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• Job Site Address:' 512- Q>� L- -\ -e5 ire�T "CATEGORY 1" ALTERNATE FOR k` TWO FAMILY DWELLINGS :,:; � � � Y ONE & INSTRUCTIONS: This alternative may be used for one- and two-family dwellings built to meet the Category 1 requirements of Minnesota Rules, Chapter 7670. Complete Parts A, B, and C. Clearly mark plans with: insulation R-values; window and skylight U- values; size and type of equipment; equipment controls; and location of vapor retarder and windwash barriers. More detailed information can be found in the Minnesota Energy Code summary sheets available from the Minnesota Department of Commerce. Part A. BUILDING ENVELOPE Check proposed envelope joint sealing option 4 ® Prescriptive(caulking,gaskets,etc.) ❑ Performance(test per 7670.0470 subp. 7.C.) Check thermal energy calculation option used 4 ❑ "Cookbook" (complete worksheet below) 8 MnCheck method(attach report) 0 Performance (attach U-value calculations) ❑ Systems Analysis method(attach analysis) MINIMUM REQUIREMENTS "Cookbook" Worksheet (for"Cookbook"option only) ❑ Ceiling Insulation: Minimum R-38 with 7%,"energy heel; or INSTRUCTIONS Minimum R-44 with low truss heel; or Step I. Check item(s)that design meets on Minimum Requirements list Minimum R-38 with R-5 sheathing when no attic. to the right. Must meet all items to use"Cookbook"option. 0 Entry Doors: Max. U-value of 0.30 or 1'/1"solid wood with storm Step 2. Indicate proposed wall type on table below. ❑ Rim Joist Insulation: Minimum R-19 Step 3. Indicate Window U-value and source. ❑ Floors over unconditioned spaces: Minimum R-24 Step 4. Verify total window(including area of all foundation windows) 0 Foundation Insulation: Minimum R-10 and door area is equal or less than allowable percentage. 0 Foundation windows: '/"insulated glass,wood or vinyl frame TABLE FOR DETERMINING MAXIMUM WINDOW AND DOOR AREA Maximum Allowable Total Window and Door Area as a Percentage of Exposed Wall > 12% 14% 16% 18% 20% 22% 24% 26% 28% _Wall Type (Standard Framing): Maximum Average Window U-value(except foundation windows): ❑ 2x4,R-13 insulation,Z R-7 sheathing 0.55 0.47 0.41 0.36 0.33 0.30 0.27 0.25 0.23 ❑ 2x4,R-15 insulation,2 R-5 sheathing 0.52 0.45 0.39 0.35 0.31 0.28 0.26 0.24 0.22 ❑ 2x6,R-l9 insulation,<R-5 sheathing 0.48 0.41 0.36 0.32 0.29 0.26 0.24 0.22 0.21 ❑ 2x6,R-19 insulation,2 R-5 sheathing 0.56 0.48 0.42 0,37 0.34 0.31 0.28 0.26 0.24 ❑ 2x6,R-2I insulation,<R-5 sheathing 0.51 0.43 0.38 0.34 0.30 0.28 0.25 0.23 0.22 ❑ 2x6,R-2l insulation,Z R-5 sheathing 0.58 0.50 0.44 0.39 0.35 0.32 0.29 0.27 0.25 Wall Type (Advanced Framing): Maximum Average Window U-value(except foundation windows): ❑ 2x6,R-19 insulation,<R-5 sheathing 0.52 0.45 0.39 0.35 0.31 0.28 0.26 0.24 0.22 ❑ 2x6,R-19 insulation,2 R-5 sheathing 0.58 0.50 0.44 0.39 0.35 0.32 0.29 0.27 0.25 ❑ 2x6,R-2l insulation,<R-5 sheathing 0.55 0.47 0.41 0.36 0.33 0.30 0.27 0.25 0.23 ❑ 2x6,R-21 insulation,Z R-5 sheathing 0.60 0.52 0.46 0.41 0.36 0.33 0.30 0.28 0.26 Window U-value: Source: ❑NFRC ❑ ASHRAE 1993 Handbook 100 x = % i < % window&door area gross exposed wall area DESIGN ALLOWABLE (from table above) MINNESOTA ENERGY CODE - WHICH RULES MAY I USE ? TYPE OF RESIDENTIAL BUILDING APPLICABLE RULES Detached R-3 occupancy 1-and 2-family dwellings Chapter 7672; or Examples: single family,twin homes,duplexes Chapter 7670"Category 1" with statutory depressurization and ventilation requirements Attached R-3 occupancy dwellings Chapter 7674; or Examples: triplex townhouses and row houses Chapter 7670 with either"Category l" or "Category 2" provisions R-1 occupancy buildings of 3 stories or less Chapter 7674; or Examples: condominiums or apartments Chapter 7670 with either"Category I" or "Category 2" provisions R-I occupancy buildings over 3 stories high Chapter 7676 , 4-112000 Examples: high rise condos or apartments