DEPARTMENT OF CONSUMER AND INDUSTRY SERVICES
Michigan Uniform Energy Code 1

Michigan Uniform Energy Code 1

R 408.31061 Definitions; A to C 1

R 408.31062 Definitions; E to G. 4

R 408.31063 Definitions; H to M. 6

R 408.31064 Definitions; O to R. 8

R 408.31065 Definitions; S to T. 11

R 408.31066 Definitions; U to Z. 13

R 408.31070 Code title, intent, compliance, exemption; adoption of standards by reference. 17

R 408.31071 Materials and equipment; identification; insulation installation, maintenance and labeling; fenestration rating, certification, and labeling.19

R 408.31072 Alternate materials, method of construction, design or insulating systems. 21

R 408.31073 Residential building design by prescriptive approach;building envelope requirements. 21

R 408.31074 Building component criteria; walls. 22

R 408.31075 Building component criteria; fenestration. 24

R 408.31076 Building component criteria; roof/ceiling. 24

R 408.31077 Building component criteria; floors over unconditionedspace. 25

R 408.31078 Building component criteria; slab-on-grade floors . 25

R 408.31079 Building component criteria; crawl space walls . 26

R 408.31080 Building component criteria; finished lower level walls. 27

R 408.31081 Building component criteria; exposed basement walls . 27

R 408.31082 Air leakage. 28

408.31083 Residential building design by systems analysis and designof buildings utilizing renewable sources. 28

R 408.31084 Renewable energy source analysis. 32

R 408.31085 Heating energy analysis comparison report. 35

R 408.31099 Rescissions. 38

Filed with the Secretary of State on These rules take effect on March 31, 1999

(By authority conferred on the director of the department of consumerand industry services by section 4 of Act No. 230 of the Public Acts of1972, as amended, and Executive Reorganization Order No. 1996-2, being;§§125.1504 and 445.2001 of the Michigan Compiled Laws)

PART 10. MICHIGAN UNIFORM ENERGY CODE

Rule 1061. As used in these rules:

(a) "Addition" means new construction which is performedon an existing building and which increases the outside dimensions of thebuilding.

(b) "Air leakage" means a measure of the airtightness ofa building shell caused by the pressure differential across the buildingenvelope and the resulting airflow rate through the envelope.

(c) "Alteration" means an enhancement, upgrading, or substantialchange or modification, other than an addition or repair, to an existingstructure.

(d) "Annual fuel utilization efficiency" or "AFUE"means the efficiency rating of the heating plant model determined on averageusage conditions as set out in the United States department of energy testprocedures. It does not include electrical energy usage for gas or oil-firedfurnace or boiler usage.

(e) "Band joist" means the peripheral edges of framed floors.

(f) "Basement" means any floor level below the first story in a building, except that a floor level in a building that has only 1 floor level shall be classified as a basement, unless the floor level qualifies as a story above grade.

(g) "Basement wall" means the opaque portion of a wall which encloses 1 side of a basement and which is partially or totally below grade.

(h) "British thermal units" or "Btu" means approximately the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit at 39.2 degrees Fahrenheit and at 1 atmosphere of pressure.

(i) "Building" means any structure which is occupied or intended to be occupied and which is for supporting or sheltering any occupancy. Portions of a building that are completely separated from other portions by fire separation walls are considered separate buildings.

 (j) "Building envelope" means the elements of a building that enclose conditioned spaces through which thermal energy may be transferred to or from the exterior or to or from spaces exempted by R 408.31070 (6).

(k) "Building official" means the person authorized under section 2 of Act No. 54 of the Public Acts of 1986, as amended, being §338.2302of the Michigan Compiled Laws, to act on behalf of the responsible government agency for the administration of the applicable building code.

(l) "Closed construction" means any building, building component, assembly, or system manufactured in a way that it cannot be inspected before installation at the building site without disassembly, damage, or destruction.

(m) "Coefficient of performance" or "COP" means the ratio of useful energy produced by a refrigeration system or heat pump divided by the energy consumed. The higher the COP value, the more efficient the heat pump. A COP of 3, for example, means that three times as much heating energy was delivered as it took to power the heat pump.

(n) "Conditioned floor area" means the horizontal projection of the portion of interior space which is contained within exterior wall sand which is conditioned directly or indirectly by an energy-using system.

(o) "Conditioned space" means space within a building that is provided with a positive heat supply.

(p) "Cost effective" means that the economic benefits of the requirements of these rules will exceed the economic costs of the requirements of these rules based on a multiyear analysis. The analysis shall be in compliance with all of the following provisions:

(I) Take into consideration the perspective of a typical first-time new home buyer.

(ii) Consider benefits and costs over a 7-year time period.

(iii) Not assume fuel price increases in excess of the assumed general rate of inflation.

(iv) Assure that the buyer of a home who qualifies to purchase the home before the addition of the energy efficiency standards would still qualify to purchase the same home after the additional cost of the energy-saving construction features.

(v) Assure that the cost of principal, interest, taxes, insurance, and utilities will not be greater after the inclusion of the cost of the additional energy-saving construction features required by this part as opposed to the provisions of R 408.31001 to R 408.31055.

(q) "Crawl space" means an area below the floor nearest grade that is supported by foundation walls and that does not qualify as a basement or story above grade due to restrictive height conditions.

(r) "Crawl space wall" means the opaque portion of a wall which encloses a crawl space and which is partially or totally below grade.

R 408.31062 Definitions; E to G.

Rule 1062. As used in these rules:

(a) "Energy" means the capacity for doing work and takes a number of forms that may be transformed from one into another, such as thermal (heat), mechanical (work), electrical, and chemical energy in customary units measured in kilowatt-hours (kWh) or British thermal units (Btu).

(b) "Energy efficiency ratio" or "EER" means the ratio of net cooling capacity in Btu per hour to total rate of electric input, in watts, under designed operating conditions.

(c) "Existing residential building" means a residential building erected before the effective date of R 408.31061, this rule, and R 408.31063to R 408.31099, a residential building for which a valid building permit or certificate of occupancy has been issued, or a residential building for which lawful construction commenced before the effective date of R 408.31061, this rule, and R 408.31063 to R 408.31099.

(d) "Existing residential structure" means a residential structure erected before the effective date of R 408.31061, this rule, and R 408.31063 to R 408.31099, a residential structure for which a valid building permit or certificate of occupancy has been issued, or a residential structure for which lawful construction commenced before the effective date of R 408.31061, this rule, and R 408.31063 to R 408.31099.

(e) "Fenestration" means all envelope component assemblies, including doors, which are in a building wall or ceiling, which are used for light transmittance, ingress, or egress, and which enclose conditioned space.

(f) "Finished lower level" means a basement, or portion ofa basement that is an enclosed area, which is suitable for year-round use, including walls, floors, and ceilings, and which meets the requirements of the applicable building code for its intended use.

(g) "Floors over unconditioned spaces" means a conditioned floor area that is over unconditioned space, outdoor air, or space exempted by R 408.31070 (6) (a) and (b).

(h) "Foundation wall" means a wall below the floor nearest grade that serves as a support for a wall or other structural part of a building.

(i) "Grade plane" means a reference plane representing the average of finished ground level adjoining the building at all exterior walls. If the finished ground level slopes away from the exterior walls, then the reference plane shall be established by the lowest points within the area between the building and the lot line or, where the lot line is more than 6 feet from the building, between the building and a point 6 feet from the building.

(j) "Gross area of exterior walls" means both of the following:

(i) The normal projection of the building envelope insulated wall area that bounds interior space which is conditioned by an energy-using system, including window, door, and opaque wall area.

(ii) All opaque insulated wall areas which are exposed to outdoor air, unconditioned spaces, or spaces exempted by R 408.31070 (6) (a) and (b)and which enclose a heated or mechanically cooled space including interstitial area between 2 heated or mechanically cooled spaces, including any of the following areas:

(A) Between-floor spandrels.

(B) Peripheral edges of floors.

(C) Window areas, including sash, and door areas.

(k) "Ground source heat pump" means a mechanical device which is used for heating and cooling and which operates by using the earth as a heat source and heat sink. The system circulates fluid through a heat exchanger to extract or reject heat from a ground or water source.

Rule 1063. As used in these rules:

(a) "Heated slab" means slab-on-grade construction in which the heating elements or hot air distribution system is in contact with, or placed within, the slab or the sub grade.

(b) "Heated space" means space within a building that is provided with a positive heat supply. Finished lower level space within a basement that has registers or heating devices designed to supply heat to the space is heated space.

(c) "Heating degree day" or "HDD" means a unit of temperature and time that may be used to estimate fuel consumption, specify fuel consumption, and specify nominal heating load of a building in winter. A heating degree-day accrues for every degree that mean outdoor temperature for a 24-hour period falls below 65 degrees Fahrenheit.

(d) "Heating seasonal performance factor" or "HSPF" means the total heating output of a heat pump during its normal annual usage period for heating, in Btu, divided by the total electric energy input during the same period, in watt hours, as determined by 10 C.F.R. part 430, subpart B, test procedure.

(e) "HVAC" means heating, ventilating, air conditioning.

(f) "HVAC system equipment" means equipment that provides, in 1 single package or more (split system) factory-assembled packages, a means for air circulation, air cleaning, or air cooling with controlled temperature. The cooling function may be either electrically operated or heat operated. The refrigerant condenser may be air, water, or evaporatively cooled. If the equipment is provided in more than 1 package, then the separate packages shall be designed by the manufacturer to be used together. The equipment may provide the heating function as a heat pump or through the use of electric or fossil fuel-fired elements.

(g) "Infiltration" means the uncontrolled inward air leakage which occurs through cracks and interstices in any building element and + around windows and doors of a building and which is caused by the pressure effects of wind or temperature differences, or both, or appliance-induced pressures.

(h) "Insulation component" means insulating materials or combinations of insulating materials which are used in the course of construction as insulation, which are certified to meet ASTM C-578 standard, and which are in compliance with R 408.31071.

(i) "Manufactured building" means any closed construction building, except for a mobile home, that is made or assembled in manufacturing facilities on or off the building site. The term also means any open construction building that is made away from the building site for installation or assembly and installation on the building site.

 (j) "Mobile home" means a factory-assembled, movable dwelling which is designed and constructed to meet United States housing and urban development department (HUD) standards and to be towed on its own chassis that is comprised of the frame and wheels and which is distinguishable from other types of dwellings in that the standards to which it is built include provisions for its mobility on a chassis as a vehicle.

Rule 1064. As used in these rules:

(a) "Occupied" means a building in which a person resides or which is intended, arranged, or designated to be occupied.

(b) "Opaque area" means any exposed area of a building envelope that encloses conditioned space, except openings for windows, skylights, doors, and building service systems.

(c) "Opaque exterior building envelope" means all exposed areas of a building envelope that enclose conditioned space, except openings for windows, skylights, doors, and building service systems.

(d) "Open construction" means any building, building component, assembly, or system that is manufactured in a way that it can readily be inspected at the building site without disassembly, damage, or destruction.

(e) "Openings" means fenestration areas that penetrate and comprise part of the gross area of exterior walls (jamb size).

(f) "Overall thermal transmittance" or "Uo" means the area-weighted average of the thermal transmittance values of all material, including framing and fenestration, as well as the component assemblies, such as air film, insulation, drywall, framing, and glazing, that make up the building envelope.

(g) "Permit" means an official document or certificate which is issued by the governmental subdivision and which authorizes performance of a specified activity.

(h) "Positive heat supply" means either of the following:

(i) Heat directly supplied to a space by design, such as a supply register, radiator, or heating element.

(ii) Heat indirectly supplied to a space by convection from the energy-consuming systems if the energy-consuming systems are not insulated and continually maintain air temperature within the space of 50 degrees Fahrenheit or higher during normal operation.

(i) "Prescriptive requirements" means specified values or rules representing the requirements that must be met to achieve compliance with R 408.31073, R 408.31074 to R 408.31081, R 408.31082 and 408.31083.

(j) "Renewable energy sources" mean sources of energy, excluding minerals, derived from incoming solar radiation, including any of the following:

(i) Natural day light and photosynthetic processes.

(ii) Phenomena resulting from natural day light and photosynthetic processes, including wind, waves, and tides and lake or pond thermal differences.

(iii) The internal heat of the earth, including nocturnal thermal exchanges.

(k) "Repair" means the act or process of restoring to original soundness, including, but not limited to, any of the following:

(i) Redecorating.

(ii) Refinishing.

(iii) Nonstructural repairs.

(iv) Maintenance repairs or replacement of existing fixtures, systems, or equipment.

(l) "Residential buildings" means any of the following:

(i) Detached 1 and 2-family dwellings.

(ii) Other residential buildings that are 3 stories or less in height.

(iii) A building or structure which is incidental to the use of the main residential building and which is located within the apartment complex or subdivision.

(m) "Roof/ceiling assembly" means a roof/ceiling assembly and all components of the roof/ceiling envelope through which heat flow sand creates a building transmission heat loss or gain where the assembly is exposed to outdoor air and encloses a heated or mechanically cooled space. The gross area of a roof/ceiling assembly consists of the total interior surface of the assembly, including skylights exposed to the heated or mechanically cooled space.

(n) "R-value" means the measure of thermal resistance, that is, how well a material or series of materials resists the flow of heat. R-value is the reciprocal of thermal transmittance or ( R=1/U ).

Rule 1065. As used in these rules:

(a) "Sash crack" means the sum of all weather-stripped perimeters of window sashes, skylights, and doors. The sum shall be based on overall dimensions of the weather stripped perimeters of window sashes, skylights, and doors, expressed in feet. If a portion of one sash perimeter over laps a portion of another sash perimeter, then the length of the over lapping portions is counted once.

(b) "Seasonal energy efficiency ratio" or "SEER" means the total cooling output of an air conditioner during its normal annual usage period for cooling, in Btu/h, divided by the total electric energy input during the same period, in watt-hours, as determined by 10 C.F.R. part 430, subpart B, test procedure.

(c) "Slab-on-grade floor insulation" means insulation around the perimeter of the floor slab or its supporting foundation when the top edge of the floor perimeter slab is above the finished grade or 12 inches or less below the finished grade.

(d) "Story" means the portion of a building included between the upper surface of a floor and the upper surface of the floor or roof next above.

(e) "Story above grade" means any story that has its finished floor surface entirely above grade, except that a basement shall be considered as a story above grade if the finished surface of the floor above the basement is any of the following:

(i) More than 6 feet above grade plane.

(ii) More than 6 feet above the finished ground level for more than50% of the total building perimeter.

(iii) More than 12 feet above the finished ground level at any point.

(f) "Structure" means that which is built or constructed or a portion of something that is built or constructed.

(g) "System" means a combination of central or terminal equipment or components, or controls, accessories, interconnecting means, and terminal devices, by which energy is transformed so as to perform a specific function, such as HVAC.

(h) "Thermal resistance" or "R" means a measure of the ability to retard the flow of heat. The R-value is the reciprocal of thermal transmittance or R=1/U.

(i) "Thermal transmittance" or "U" means time rate of heat flow through a body or assembly that is located in 2 different environments, expressed in Btu per (hour)(square foot)(degree Fahrenheit). The U-value applies to all of the following:

(i) The combination of different materials used in series along the heat flow path.

(ii) Single materials that comprise a building section.

(iii) Cavity air spaces.

(iv) Surface air films on both sides.

R 408.31066 Definitions; U to Z.

Rule 1066. As used in these rules:

(a) "Unconditioned space" means space within a building that is not conditioned space.

(b) "Walls" means the portions of the building envelope that are vertical or tilted at an angle of 30 degrees or less from the vertical plane.

(c) "Warm air furnace" means a self-contained, indirect-fired or electrically heated furnace that supplies heated air through ducts to spaces that require it.

(d) "Zone 1" means the following counties:

(i) Allegan.

(ii) Barry.

(iii) Berrien.

(iv) Branch.

(v) Calhoun.

(vi) Cass.

(vii) Clinton.

(viii) Eaton.

(ix) Genessee.

(x) Gratiot.

(xi) Hillsdale.

(xii) Huron.

(xiii) Ingham.

(xiv) Ionia.

(xv) Jackson.

(xvi) Kalamazoo.

(xvii) Kent.

(xviii) Lapeer.

(xix) Lenawee.

(xx) Livingston.

(xxi) Macomb.

(xxii) Monroe.

(xxiii) Montcalm.

(xxiv) Muskegon.

(xxv) Oakland.

(xxvi) Ottawa.

(xxvii) Saginaw.

(xxviii) Sanilac.

(xxix) Shiawassee.

(xxx) St. Clair.

(xxxi) St. Joseph.

(xxxii) Tuscola.

(xxxiii) Van Buren.

(xxxiv) Washtenaw.

(xxxv) Wayne.

(e) "Zone 2" means the following counties:

(i) Alcona.

(ii) Alpena.

(iii) Antrim.

(iv) Arenac.

(v) Bay.

(vi) Benzie.

(vii) Charlevoix.

(viii) Cheboygan.

(ix) Clare.

(x) Crawford.

(xi) Emmet.

(xii) Gladwin.

(xiii) Grand Traverse.

(xiv) Iosco.

(xv) Isabella.

(xvi) Kalkaska.

(xvii) Lake.

(xviii) Leelanau.

(xix) Manistee.

(xx) Mason.

(xxi) Mecosta.

(xxii) Midland.

(xxiii) Missaukee.

(xxiv) Montmorency.

(xxv) Newaygo.

(xxvi) Oceana.

(xxvii) Ogemaw.

(xxviii) Osceola.

(xxix) Oscoda.

(xxx) Otsego.

(xxxi) Presque Isle.

(xxxii) Roscommon.

(xxxiii) Wexford.

(f) "Zone 3" means the following counties:

(i) Alger.

(ii) Baraga.

(iii) Chippewa.

(iv) Delta.

(v) Dickinson.

(vi) Gogebic.

(vii) Houghton.

(viii) Iron.

(ix) Keweenaw.

(x) Luce.

(xi) Mackinac.

(xii) Marquette.

(xiii) Menominee.

(xiv) Ontonagon.

(xv) Schoolcraft.

Rule 1070. (1) These rules shall be known as the Michigan uniform energy code.

(2) The intent of the Michigan uniform energy code, referred to as" the code," is to provide cost-effective minimum energy conservation requirements when designing or building new residential buildings or structures. The code is not intended to be, nor should it be construed as, the optimization of energy-conserving practices. The code provides flexibility to permit the use of innovative approaches and techniques to achieve the effective utilization of energy.

(3) Residential buildings shall be designed and constructed to comply with either the requirements of R 408.31073, R 408.31074 to R 408.31081,R 408.31082 and R 408.31083 or the requirements of R 408.31084, R 408.31085 and R 408.31086.

(4) Residential buildings that have more than 1 occupancy shall conform each portion of the building to the requirements for the occupancy within that portion. If minor accessory uses do not occupy more than 10% of the area of any floor of a building, then the major use shall be considered the building occupancy.

(5) Compliance with the code shall be achieved by 1 of the methods specified in this sub rule. The decision of which method to use to achieve compliance with the code shall be the sole discretion of the builder and shall be accepted by the building official. The methods are as follows:

(a) A prescriptive approach for insulating components as required in R 408.31073,

(b) A systems approach for the entire building performance as required in R 408.31084,

(6) All of the following buildings are exempt from the code:

(a) A residential building or portion of a residential building that has an intended maximum rate of energy usage less than 3.4 Btu/h per square foot of floor area for all purposes.

(b) A residential building or portion of a residential building that is not heated or mechanically cooled.

(c) An existing building.

(d) An alteration of any existing residential building or structure or portion of a residential building.

(e) An addition to any existing residential building or structure.

(f) An existing residential building moved into or within the jurisdiction. A manufactured building that is shipped for initial installation or initial assembly and installation on a building site shall not be considered a moved structure.

(7) A building, other than a residential building, shall be designed and constructed to comply with the requirements of ASHRAE 90A-1980 and 90B-1975.

R 408.31071 Materials and equipment; identification; insulation installation, maintenance, and labeling; fenestration rating, certification, and labeling.

Rule 1071. (1) As required by the code, materials and equipment shall be identified to show compliance with the code.

(2) Either each piece of building envelope insulation that is 12 inches or more in width shall have a manufacturer-applied thermal resistance (R)identification mark or the insulation installer shall provide a signed and dated certification for the insulation installed in each element of thebuilding envelope. The certification shall list the type of insulation, the manufacturer, and the R-value. For blown-in or sprayed insulation, the installer shall also provide all of the following information:

(a) the initial installed thickness.

(b) the settled thickness.

(c) the coverage area.

(d) the number of bags installed.

 The installer shall provide the certification to the building official.

(3) The amount of air leakage of pre manufactured fenestration products, including windows, doors, and skylights in locations separating outdoor ambient conditions or exempted portions of the building from interior spaces that are heated or mechanically cooled, shall be labeled or certified by the manufacturer not to be more than .37 cubic feet per minute (CFM) of air leakage per lineal foot of sash crack perimeter at an air pressure of1.56 pounds per square foot (PSF) (25 MPH) using ASTM-E283 procedures. Certified or labeled values shall be accepted in determining compliance with the building envelope requirements of the code.

Custom-installed windows and doors that are not pre manufactured are exempt from product rating requirements for air leakage. The installation of custom fenestration products shall comply with R 408.31082.

(4) Roof/ceiling, floor, and wall cavity insulation shall be installed so that the manufacturer's R-value identification mark can be readily inspected. For roof/ceiling insulation, the thickness of the insulation that is either blown in or sprayed by thickness shall be identified by markers that are labeled in inches. The markers shall be installed in not less than 5 locations in each separate attic area. Four markers shall be evenly spaced around the perimeter of the space and 1 shall be located near the access opening. The markers shall be affixed to the truss or joist/rafter framing before application of the loose-fill insulation and shall be marked with the minimum initial installed thickness recommended by the loose-fill manufacturer and also, when given on the manufacturer's label, shall mark the minimum settled thickness. The markers shall be installed to accurately indicate the depth of installed insulation.

(5) An installer shall install the loose-fill insulation at a uniform depth throughout the open area of the attic. The depth shall equal or exceed the minimum initial installed thickness shown on the markers. The minimum bags per 1,000 square feet recommended by the manufacturer shall be installed.

(6) All needed maintenance actions that must be performed on a regular basis shall be clearly stated and incorporated on a readily accessible label. The label shall be easily accessed and indicate, by title or publication number, the manual for the particular model and type of product that provides operation and maintenance requirements and instructions. Maintenance instructions shall be provided for any equipment that requires preventive maintenance for efficient operation.

(7) R-values of fenestration products, including windows, doors, and skylights, shall be determined from the center of the unit or glass by an accredited independent laboratory and labeled or shall be certified by the manufacturer or fabricator. Labeled or certified values shall be accepted for purposes of determining compliance with the building envelope requirements of the code.

R 408.31072 Alternate materials, method of construction, design, or insulating systems.

Rule 1072. The code is not intended to preclude the use of any material, method of construction, design, or insulating system not specifically mentioned in the code if the material, method of construction, design, or insulating system has been approved by the building official as meeting the intent of the code.

R 408.31073 Residential building design by prescriptive approach; buildingenvelope requirements.

Rule 1073. (1) This rule applies to residential buildings that are to be heated or mechanically cooled and are designed or constructed in accordance with this rule,

R 408.31074 to R 408.31081, R 408.31082 and 408.31083.

(2) The requirements in R 408.31074 to R 408.31081 are not intended to be limiting. Methods of construction that combine insulating materials may be used if documentation is submitted to the building official indicating the thermal resistance value (R) of the total insulation materials. The documentation shall be in accordance with accepted engineering practice. Documentation submitted by a person licensed under article 24 of Act No.299 of the Public Acts of 1980, as amended, being §339.2401 et seq. of the Michigan Compiled Laws, need not be prepared, sealed, or submitted by an architect, professional engineer, or other consultant.

(3) The design shall not create conditions of accelerated deterioration from moisture condensation. In all frame walls, floors, and ceilings not ventilated to allow moisture to escape, an approved vapor retarder that has a maximum perm rating of 1.0 shall be used on the warm-in-winter side of the thermal insulation.

Rule 1074. (1) The thermal resistance value (R) of the insulation or the exterior walls and band joists comprising the building envelope above the foundation wall shall not be less than the value specified in table 1074, as follows:

(a) R13 for zone 1.

(b) R15 for zone 2.

(c) R19 for zone 3.

(2) Table 1074 reads as follows:

Building Component

Zone 1

Zone 2

Zone 3

R 408.31074 Walls

R13

R15

R19

R 480.31075 Fenestration/openings Up to and including 15% gross exterior wall area

R1.9

R1.9

R1.9

Over 15% and including 20% gross exterior wall area

R2.5

R2.5

R2.5

Over 20% gross exterior wall area Refer to building envelope opening allowance trade-off options (R408.31083)

R 408.31076 Roof/ceiling

Skylights follow fenestration requirements for R values and are limited to 10% of gross roof/ceiling area

R30

R38

R38

R 408.31077 Floors over unconditioned spaces (including outdoor overhangs)

R21

R30

R30

R 408.31078 Slab-on-grade floors Unheated slabs

Heated slabs

R5

R10

R5

R10

R5

R10

R 408.31079 Crawl space walls

R5

R5

R5

R 408.31080 Finished lower level walls

R5

R5

R5

R 408.31081 Exposed basement walls (More than 7% of the gross exterior wall area)

R5

R5

R5

R 408.31075 Building component criteria; fenestration.

Rule 1075. All of the following provisions apply to fenestration:

(1) Openings, including doors, in the opaque exterior building envelope up to and including 15% of gross exterior wall area shall have a thermal resistance R-value that is not less than the value specified in table 1074,being R1.9 for zone 1, zone 2, and zone 3.

(2) If openings, including doors, in the opaque exterior building envelope exceed 15% up to and including 20% of gross exterior wall area, they shall have a thermal resistance R-value that is not less than the value specified in table 1074, being R2.5 for zone 1, zone 2, and zone 3.

(3) If openings, including doors, in the exterior building envelope exceed 20% of the gross area of exterior walls, then the requirements of R 408.31083 shall apply.

R 408.31076 Building component criteria; roof/ceiling.

Rule 1076. The thermal resistance value (R) of the insulation for the roof/ceiling assembly comprising the building envelope shall not be less than the value specified in table 1074, as follows:

(a) R30 for zone 1.

(b) R38 for zone 2 and zone 3.

R 408.31077 Building component criteria; floors over unconditioned space.

Rule 1077. The thermal resistance value (R) of the insulation for floors over unconditioned spaces comprising the building envelope, including outdoor overhangs, shall not be less than the value specified in table 1074,as follows:

(a) R21 for zone 1.

(b) R30 for zone 2 and zone 3.

R 408.31078 Building component criteria; slab-on-grade floors.

Rule 1078. All of the following provisions apply to slab-on-grade floors:

(a) The thermal resistance value (R) of the insulation around the perimeter of the floor comprising the building envelope shall be not less than the value specified in table 1074, as follows:

(i) R5 for unheated slabs for zone 1, zone 2, and zone 3.

(ii) R10 for heated slabs for zone 1, zone 2, and zone 3.

(b) Insulation shall be placed around the perimeter of the floor slab or its supporting foundation when the top edge of the floor perimeter slab is above the finished grade or 12 inches or less below the finished grade.

(c) The insulation shall extend downward from the elevation of the top of the slab for a minimum distance of 24 inches or downward to at least the bottom of the slab and then horizontally to the interior or exterior for a minimum total distance of 24 inches.

(d) The insulation shall be of an approved type.

(e) Horizontal insulation extending outside of the foundation shall be covered by a protective material or by soil that is a minimum of 10 inches thick.

(f) The top edge of the insulation installed between the exterior wall and the edge of the interior slab shall be permitted to be cut at a 45-degreeangle away from the exterior wall.

R 408.31079 Building component criteria; crawl space walls.

Rule 1079. The exterior walls of crawl spaces comprising the building envelope and below uninsulated floors shall have insulation that has a thermal resistance value (R) of not less than R5 for zone 1, zone 2, and zone 3,as specified in table 1074. All of the following provisions apply to crawl space walls:

(a) The crawl space wall insulation shall extend vertically from the top of the foundation wall to the outside finished ground level.

(b) The insulation shall also extend not less than 24 inches below outside finished ground level or a combined vertical and horizontal distance of 24 inches from the outside finished ground level.

(c) Horizontal insulation extending outside of the foundation shall be covered by a protective material or by soil that is a minimum of 10 inches thick.

(d) The insulated crawl space walls are included as part of the gross area of exterior walls from the top of the foundation wall to the outside finished ground level.

(e) When crawl spaces below uninsulated floors are ventilated during the summer, the vent area shall be provided at a ratio of 1 square foot per 1,500 square feet of crawl space floor area. The ground surface (floor) within the crawl space shall be covered with a material that has a rating of 1.0 perm or less.

(f) An insulated crawl space that comprises the building envelope and is a heated space through the existence of a positive heat supply is not required to be ventilated during the heating season.

R 408.31080 Building component criteria; finished lower level walls.

Rule 1080. The exterior walls of heated finished lower levels shall have insulation that has a thermal resistance value (R) of not less than R5 for zone 1, zone 2, and zone 3, as specified in table 1074. Both of the following provisions apply to finished lower level walls:

(a) The wall insulation shall extend vertically from the top of the foundation wall to floor of the finished lower level.

(b) Insulated lower level walls, including the below-grade portion, are included as part of the gross area of exterior walls, if the window sand doors meet the fenestration and door requirements in R 408.31071(3)and R 408.31075.

R 408.31081 Building component criteria; exposed basement walls.

Rule 1081. The exterior basement walls, but not including masonry veneer, comprising the building envelope shall not have an uninsulated exposed area above finished grade that is more than 7% of the gross area of exterior walls. All of the following provisions apply to exposed basement walls that are exposed more than the 7% limit:

(a) Basement wall areas that are exposed more than the 7% limit shall be insulated with insulation that has a minimum thermal resistance value (R) of R5 as specified in table 1074 for zone 1, zone 2, and zone 3, until the uninsulated exposed area has been reduced to 7% or less of the gross area of exterior walls.

(b) The method or area of insulating shall be at the discretion of the builder.

(c) The insulated area of the basement walls are included as part of the gross area of exterior walls.

(d) If insulation is placed on the exterior of a foundation supporting a masonry veneer exterior, then the horizontal foundation surface supporting the veneer is not required to be insulated to satisfy the exposed basement wall criteria.

R 408.31082 Air leakage.

Rule 1082. (1) This rule applies to locations that separate outdoor ambient conditions or exempted portions of the building from interior spaces that are heated or mechanically cooled. This rule is not applicable to the separation of interior conditioned spaces from each other.

(2) Exterior joints in the building envelope that are sources of air leakage shall be caulked, gasketed, weather-stripped, or otherwise sealed. The areas may include joints around window and door frames, between wall and foundation, between wall panels, or penetrations and utility services through walls, floors, and roof/ceiling assemblies that comprise the building envelope.

Rule 1083. (1) A proposed building which is designed under R 408.31073,R 408.31074 to R 408.31081, R408.31082, and this rule and which exceeds20% fenestration and door openings of the gross area of exterior walls shall be in compliance with one of the following trade-off options:

(a) High-efficiency HVAC equipment trade-off option, subrule (2) of this rule.

(b) High-efficiency windows and doors trade-off option, subrule (3)of this rule.

(c) Roof/ceiling and wall trade-off option, subrule (4) of this rule.

(d) Basement insulation trade-off option, subrule (5) of this rule.

(e) Air leakage control trade-off option, subrule (6) of this rule.

(2) This subrule applies to equipment and mechanical component performance for heating, ventilating, and air-conditioning systems. All of the following provisions apply to the high-efficiency HVAC equipment trade-off option:

(a) With respect to warm air furnaces and combination warm air furnaces/air-conditioning units, gas and oil-fired comfort equipment shall have minimum efficiency levels of not less than 90% AFUE (heating) or an HSPF of not less than 7.8and a SEER of not less than 12 for cooling equipment.

(b) Gas and oil-fired comfort equipment (hot water boilers) shall have minimum efficiency levels of not less than 83% AFUE.

(c) Ground source heat pump systems shall have minimum efficiency levels of not less than 3.0 COP.

(d) Data furnished by the equipment supplier or certified under anationally recognized certification program or rating procedure shall be used to satisfy the requirements of this subrule.

(3) With respect to high-efficiency windows and doors trade-off option, openings in the opaque exterior building envelope shall have a thermal resistance value (R) of not less than R3.5.

(4) Both of the following provisions apply to roof/ceiling and wall insulation trade-off option:

(a) The thermal resistance value (R) of the insulation for the roof/ceiling assembly comprising the building envelope shall not be less than R38 in all zones.

(b) The thermal resistance value (R) of the insulation for the exterior walls comprising the building envelope above the foundation wall shall not be less than the following:

(i) R15 for zone 1.

(ii) R19 for zone 2.

(iii) R24 for zone 3.

(5) All of the following provisions apply to the basement insulation option:

(a) The exterior basement walls comprising the building envelope shall have insulation that has a thermal resistance R-value of not less than R5for all zones. The wall insulation shall extend from the top of the foundation wall to the level of the basement floor. The insulation shall be an approved type for the conditions implemented. The method of insulating shall beat the discretion of the builder.

(b) Insulated basement walls, including the below-grade portion, are included as part of the gross area of exterior walls if the windows and doors meet the fenestration and door requirements in R 408.31075 and R 408.31082(2).

(c) To be eligible as an insulation trade-off option, basement walls shall be in compliance with all of the following provisions:

(i) Be exterior walls comprising the building envelope and not supporting an insulated floor.

(ii) Not be required to be insulated by R 408.31080.

(iii) Be not less than 50% of the total basement wall area.

(6) All of the following provisions apply to the air leakage control trade-off option:

(a) Air leakage locations to be treated are openings in the buildingenvelope between conditioned space and unconditioned space or the outside. Air leakage locations include locations that have opening, cracks, and joints, as follows:

(i) Between wall cavities and window or door frames.

(ii) Between wall assemblies or their sill plates and foundations.

(iii) Between walls and roof/ceiling or attic/ceiling seals.

(iv) Between separate wall panels.

(v) Penetrations of utility services through walls, floors, and roof assemblies.

(vi) Penetrations of the wall cavities, including interior walls, through the top plates or bottom plates, or both..

(b) Air leakage control treatment includes sealing around all plumbing and electrical penetrations, recessed lights, bathtubs, and showers and at attic, knee wall, and crawl space access panels.

(c) Exterior joints, seams, or penetrations in the building envelope that are sources of air leakage shall be sealed with durable sealant materials or closed with gasketing systems.

(d) When installed in the building envelope, a recessed lighting fixture shall be in compliance with either of the following:

(i) A type IC rated, installed lighting fixture inside a sealed container constructed from appropriate fire rated materials or other airtight assembly manufactured to house a type IC rated lighting fixture.

(ii) A type IC airtight or equally rated lighting fixture which is tested at 75 Pascal (Pa) (1.57 pounds per square foot) with an air leakage rating of 2.0 cubic feet per minute (cfm) or less or which is in compliance with the state of Washington restricted airflow requirements and is labeled as such.

(e) Documentation of proposed measures providing a reduction in air changes per hour (ACH) or results of a post-construction blower-door test(0.50 ACH) may be provided to the building official to receive credit for the air leakage control trade-off option. Documentation submitted by a person licensed under article 24 of Act No. 299 of the Public Acts of 1980, as amended, being §339.2401 et seq. of the Michigan Compiled Laws, shall not be required to be prepared, sealed, or submitted by an architect, professional engineer, or other consultant.

(7) The decision of which trade-off option to use to achieve compliance with the code shall be at the sole discretion of the builder and shall be accepted by the building official.

(8) Electing a trade-off option does not exempt conformance with other requirements in

R 408.31073 and R 408.31082.

R 408.31084 Residential building design by systems analysis and designof buildings utilizing renewable sources.

Rule 1084. (1) This rule establishes design criteria, in terms of heat energy use, in a residential building, including the building envelope components. Compliance with this rule shall require an analysis of thebuilding energy usage as a system of the building envelope components and the heating source or sources proposed, hereinafter called an "energy analysis." A building designed in accordance with the code will be deemed as complying with the code if the calculated heating energy consumption is not more than that of a standard design building which has a buildingenvelope designed in accordance with this rule,

R 408.31073, R 408.31074 to R 408.31081, R 408.31082 and 408.31083, and which has a heating source that has an efficiency of 78% AFUE. For a proposed alternate building design to be considered similar to the standard design, the proposed alternate building design shall be the same as the standard design for all of the following:

(a) Equal floor area.

(b) Thermal envelope area.

(c) Exterior design conditions.

(d) Occupancy.

(e) Climate data.

(f) Usage operational schedule.

(2) The standard building design that is in compliance with the requirements of

R 408.31073, R 408.31074 to R 408.31081, R 408.31082, and 408.31083 shall be designed to include all of the following:

(a) Gas and oil-fired comfort equipment that has an efficiency level of 78% AFUE.

(b) An air changes per hour (ACH) rate of 0.80 for the purpose of calculation only.

(c) If the proposed design takes credit for reduced ACH levels, then documentation of measures for the reduction or results of a post-construction blower-door test may be provided to the building official to receive credit for the air leakage reduction. Documents submitted by a person licensed under article 24 of Act No. 299 of the Public Acts of 1980, as amended, being §339.2401 et seq. of the Michigan Compiled Laws, need not be prepared, sealed, or submitted by an architect, professional engineer, or other consultant.

(d) The typical meteorological year (TMY), or its ersatz equivalent, from the national oceanic and atmospheric administration (NOAA) or an approved equivalent, for the closest available location, shall be the same for the proposed alternative design. The builder may choose a simplified heating degree day (HDD) approach for the appropriate zone, as follows:

(i) Zone 1 6900 HDD.

(ii) Zone 2 7900 HDD.

(iii) Zone 3 9300 HDD.

The decision of which method to use shall be the sole discretion of the builder and shall be accepted by the building official.

(3) The analysis of the heating energy usage of the standard and the proposed alternative building design shall use the same methodology or calculation tool for comparison.

(4) A proposed alternative design that is submitted as an exception to the standard design criteria shall be accompanied by a heating energy analysis comparison report. The report shall provide technical detail on the 2 building and system designs and on the data used in, and resulting from, the comparative analysis to verify that both the analysis and the design meet the criteria of this rule, R 408.31085, and R 408.31086. A report submitted by a person licensed under article 24 of Act No. 299 of the Public Acts of 1980, as amended, being §339.2401 et seq. of the Michigan Compiled Laws, to a building official shall not be required to be prepared, sealed, or submitted by an architect, professional engineer, or other consultant.

R 408.31085 Renewable energy source analysis.

Rule 1085. (1) A proposed building that utilizes renewable energy sources for all or part of its energy source shall be in compliance with the requirements of R 408.31084, except that the renewable energy may be excluded from the total heating energy consumption allowed for the building.

(2) To qualify for the exclusion specified in subrule (1) of this rule, a renewable energy shall be derived from a specific collection, storage, or distribution system.

(3) The criteria specified in R 408.31084 shall apply to the proposed alternative designs that utilize renewable sources of energy.

(4) The heating energy derived from renewable sources and the reduction in conventional heating energy requirements shall be separately identified from the overall building energy use.

(5) Supporting documentation on the basis of the performance estimates for the renewable energy sources shall be submitted to the building official.

(6) If a person licensed under article 24 of Act No. 299 of the Public Acts of 1980, as amended, being §339.2401 et seq. of the Michigan Compiled Laws, submits the documentation specified in subrule (5) of this rule, then a building official shall not require that the documentation be prepared, sealed, or submitted by an architect, professional engineer, or other consultant.

R 480.31086 Heating energy analysis comparison report.

Rule 1086. (1) This rule provides a minimum requirement for a heating energy analysis comparison report. This rule provides flexibility to permit the use of innovative approaches and techniques.

(2) A comparison report shall include a basic description of the proposed alternate building design and shall identify any exceptions to the standard design criteria.

(3) The abbreviated report form 1086.3 may be used to compare a proposed alternative house with a standard design house that is in compliance with this rule through the systems analysis method. The standard design house uses the same total area of each building envelope component from the proposed alternative house. If the proposed alternative house A/R total (line 14or line 17 of form 1086.3) is less than or equal to the standard design house (line I or line L of form 1086.3), then the house is in compliance with the code.

(4) Alternative standard design constants (table 1086.4) may be used for the specific site weather data (heating degree days ) of the proposed alternative house location.

(5) Abbreviated report form 1086.3 reads as follows:

_______________________ A1 /R 1+ A 2 /R 2+ A 3/R =

Total Roof/Ceiling Area

 __________ Line 1 ROOF/CEILING (INC.. SKYLIGHTS) Z 10.036 _______________ x Z20.032 =

Line A

GROSS WALL

Opaque Wall (Does not include band joist, windows, doors, etc.)

A1 _____ /R 1 ______ = A 1 /R 1 ______

A2 _____ /R 2 ______ = A 2 /R 2 ______

A1 /R 1+ A 2 /R2=

Band Joist

A _____ /R ______ = A/R ________ =

Fenestration and Doors, Windows

A1 _____ /R 1 ______ = A 1 /R 1 ______

A2 _____ /R 2 ______ = A 2 /R 2 ______

A3 _____ /R 3 ______ = A 3 /R 3 ______

A1/R 1+ A 2 /R 2+ A 3/R 3=

Doors

A1 _____ /R 1 ______ = A 1 /R 1 ______

A2 _____ /R 2 ______ = A 2 /R 2 ______

A1 /R1 + A 2 /R2= Other

A _____ /R ______ = A/R ________ = _____________________

Total Gross Wall Area ________ Line 2 ________ Line 3 ________ Line 4 ________ Line 5 _______ Line 6

GROSS WALL

Z10.16 _______________ X Z20.15 = Total Gross Wall Area Z30.13 GROSS WALL SUBTOTAL A/R

(LINES: 2+3+4+5+6) __________ Line 7 _________ Line B

FOUNDATION/FLOOR

Floors Over Unconditioned Spaces

A _____ /R ______ = A/R _______ =

Slab on Grade Floors (Area = Perimeter x 2')

A _____ /R ______ = A/R _______ =

Crawl Space Walls (Area : Top foundation wall to average finished grade).

A _____ /R ______ = A/R _______ =

Basement Walls (Area: Top foundation wall to average finished grade).

A 1 _____ /R 1 ______ = A 1 /R 1 _______

A 2 _____ /R2 ______ = A2 /R 2 _______

A 1 /R 1 + A 2 /R2 =

Basement Windows

A ____ /R _____ = A/R ________ = _________________________

Total Gross Basement Wall Area _______ Line 8 ________ Line 9 _______ Line 10 ________ Line 11 _______ Line 12

FOUNDATION/FLOOR

Floors Over Unconditioned Spaces

Z10.05 ________________ x Z20.05 = Total Floor Area Z30.033

Slab on Grade (Unheated) Z10.17

_________________ x Z20.15 =

Total Slab Edge Area Z30.13

Slab on Grade (Heated) Z10.12

___________________ x Z20.11 =

Total Slab Edge Area Z30.10

Crawl Space Z10.16

_____________ x Z20.15 = Total Crawl Space Wall Area Z30.13

Basement Walls Z10.16

______________ x Z20.15 =

Total Gross Basement Wall Area Z30.13

________ Line C  __________ Line D  __________ Line E __________ Line F _________ Line G

FOUNDATION / FLOOR SUBTOTAL A/R

(LINES: 8+9+10+11+12) ___________ Line 13

FOUNDATION / FLOOR SUBTOTAL A/R

(LINES: C+D+E+F+G) ____________ Line H

PROPOSED ALTERNATIVE HOUSE

SUB-TOTAL A/R (LINES: 1+7+13) ___________

Line 14

STANDARD DESIGN HOUSE

SUB-TOTAL A/R (LINES: A+B+H) ____________

Line 1

HEATING EQUIPMENT EFFICIENCY

(If the same as Standard House, go to line 16 or 17)

(Oil or Gas Fired) AFUE: ________%

Line 14________ = Adjusted A/R =

0. AFUE

 _________

Line 15

HEATING EQUIPMENT EFFICIENCY

(Oil or Gas Fired) AFUE: 78%

Line 1 __________ = Adjusted A/R =

0.78 AFUE

__________

Line J

AIR LEAKAGE RATE

(If the same as Standard House, go to line 17)

___________ ACH x ________ ft 3 x 0.018 =

Air Charges per Hour Volume of House

__________

Line 16

AIR LEAKAGE RATE

0.8 ACH x ______ ft 3 x 0.018 = Volume of House

_________ Line K

PROPOSED ALTERNATIVE HOUSE TOTAL _______

Equal to or less than line L to pass (LINES: 15 + 16) Line17

STANDARD DESIGN LIMIT TOTAL _______

(LINES: J + K) Line L

(6) Table 1086.4 reads as follows:

TABLE 1086.4

ALTERNATIVE STANDARD DESIGN CONSTANTS (1/R)

FOR SYSTEMS ANALYSIS APPROACH

Heating Degree Days

6000-

6499

6500-

6999

7000-

7499

7500-7999

8000-

8499

8500-

8999

9000+

Roof/ceiling

0.038

0.036

0.034

0.032

0.03

0.03

0.03

Gross wall

0.2

0.16

0.15

0.15

0.14

0.14

0.13

Foundation/floor

° Floors over

Unconditioned space

0.05

0.05

0.05

0.05

0.033

0.033

0.033

° Slab-on-grade

Unheated slab

0.18

0.17

0.16

0.15

0.14

0.13

0.13

Heated slab

0.13

0.12

0.12

0.11

0.1

0.1

0.1

° Crawl space

0.2

0.16

0.15

0.15

0.14

0.14

0.13

& deg; Basement wall

0.2

0.16

0.15

0.15

0.14

0.14

0.13

R 408.31099 Rescission.

Rule 1099. R 408.31001 to R 408.31055 of the Michigan Administrative Code, appearing on pages 4149 to 4152 of the 1979 Michigan Administrative Code and pages 602 and 603 of the 1981 Annual Supplement to the Code, are rescinded. Line A

Total Gross Wall Area

________

Line 2

________

Line 3

________

Line 4

________

Line 5

_______

Line 6

GROSS WALL

Z10.16

_______________ X Z20.15 =

Total Gross Wall Area Z30.13

PROPOSED ALTERNATIVE HOUSE TOTAL _______

Equal to or less than line L to pass (LINES: 15 + 16) Line17

TABLE 1086.4

ALTERNATIVE STANDARD DESIGN CONSTANTS (1/R)

FOR SYSTEMS ANALYSIS APPROACH

6000-

6499

7000-

7499

8000-

8499

9000+

Roof/ceiling

0.038

0.036

0.034

0.032

0.03

0.03

0.03

Gross wall

0.2

0.16

0.15

0.15

0.14

0.14

0.13

Foundation/floor

° Floors over

Unconditioned space

0.05

0.05

0.05

0.05

0.033

0.033

0.033

° Slab-on-grade

Unheated slab

0.18

0.17

0.16

0.15

0.14

0.13

0.13

Heated slab

0.13

0.12

0.12

0.11

0.1

0.1

0.1

° Crawl space

0.2

0.16

0.15

0.15

0.14

0.14

0.13

° Basement wall

0.2

0.16

0.15

0.15

0.14

0.14

0.13

R 408.31099 Rescission.

Rule 1099. R 408.31001 to R 408.31055 of the Michigan Administrative Code, appearing on pages 4149 to 4152 of the 1979 Michigan Administrative Code and pages 602 and 603 of the 1981 Annual Supplement to the Code, are rescinded.

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