Mich. Admin. Code R. 408.30547e - Simulated performance alternative
Rule 547e.
Table N1105.5.2(1) [R405.5.2(1)] of the
TABLE N1105.5.2(1) [R405.5.2(1)]
SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
|
STANDARD REFERENCE DESIGN |
PROPOSED DESIGN |
Above- |
Type: mass wall if proposed wall is mass; otherwise wood frame. Gross area: same as proposed U-factor: from Table N1102.1.3 Solar absorptance = 0.75 Remittance = 0.90 |
As proposed As proposed As proposed As proposed As proposed |
|
Type: same as proposed Gross area: same as proposed U-factor: from Table N1102.1.3, with insulation layer on interior side of walls. |
As proposed As proposed As proposed |
Above- |
Type: wood frame Gross area: same as proposed U-factor: from Table N1102.1.4 |
As proposed As proposed As proposed |
Ceilings |
Type: wood frame Gross area: same as proposed U-factor: from Table N1102.1.4 |
As proposed As proposed As proposed |
Roofs |
Type: composition shingle on wood sheathing Gross area: same as proposed Solar absorptance = 0.75 Emittance = 0.90 |
As proposed As proposed As proposed As proposed |
Attics |
Type: vented with aperture = 1 ft2 per 300 ft2 ceiling area |
As proposed |
Foundations |
Type: same as proposed foundation wall area
above and below |
As proposed As proposed |
Doors |
Area: 40 ft2 Orientation: North U-factor: same as fenestration from Table N1102.1.3. |
As proposed As proposed As proposed |
Glazing |
Totalb = (a) The proposed glazing area: where proposed glazing area is less than 15% of the conditioned floor area. (b) 15% of the conditioned floor area; where the proposed glazing area is 15% or more of the conditioned floor area. Orientation: equally distributed to four cardinal compass orientations (N, E, S & W). U-factor: from Table N1102.1.4 SHGC: From Table N1102.1.2 except that for climates with no requirement (NR) SHGC = 0.40 shall be used. Interior shade fraction: 0.92-(0.21 x SHGC for the standard reference design) External shading: none |
As proposed As proposed As proposed As proposed 0.92-(0.21 x SHGC as proposed) As proposed |
Skylights |
None |
As proposed |
Thermally isolated sunrooms |
None |
As proposed |
Air exchange rate |
Air leakage rate of 4 air changes per hour at a
CFA = conditioned floor area Nbr = number of bedrooms Energy recovery shall not be assumed for mechanical ventilation. |
The measured air exchange ratec. The mechanical ventilation rated shall be in addition to the air leakage rate and shall be as proposed. |
Internal gains |
IGain = 17,900 + 23.8 x CFA + 4104 x Nbr (Btu/day per dwelling unit) |
Same as standard reference design. |
Internal mass |
An internal mass for furniture and contents of 8 pounds per square foot of floor area. |
Same as standard reference design, plus any
additional mass specifically designed as a thermal storage
elementc but not integral to the |
Structural mass |
For masonry floor slabs, 80% of floor area
covered by R-2 carpet and pad, and 20% of floor directly exposed to For Masonry Table R402.1.4 located on the interior side of the walls. For other walls, for ceilings, floors, and interior walls, wood frame construction. |
As proposed As proposed As proposed |
Heating
|
As proposed for other than electric heating
without a heat pump. Where the proposed design utilizes electric heating
without a heat pump the standard reference design shall be an air source heat
pump meeting the requirements of the Michigan energy |
As proposed |
Cooling
|
As proposed
|
As proposed |
|
As proposed Use: same as proposed design |
As proposed |
Thermal |
Untested distribution systems: DSE = 0.88 Tested ducts: Leakage rate to outside conditioned space as specified Section N1103.3.2 Tested duct Tested duct insulation: in accordance with Section N1103.3.1 |
Untested distribution systems: DSE from Table N1105.5.2(2) Tested ducts: Tested leakage rate to outside conditioned space Duct Duct insulation: As proposed |
Thermostat |
Type: Manual, cooling temperature setpoint = 75°F; Heating temperature setpoint = 72°F |
Same as standard reference |
For SI: 1 square foot = 0.93
m2, 1
AF = As x FA x F
where:
AF = Total glazing area.
As = Standard reference design total glazing area.
FA = (Above-
F = (Above-
and where:
Thermal boundary wall is any wall that separates conditioned space from unconditioned space from unconditioned space or ambient conditions.
Above-
Below-
Common wall area is the area of walls shared with an adjoining dwelling unit.
L and CFA are in the same units.
Notes
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