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"State Specific Zones (not REScheck™ zones)"
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REScheck™ was developed by Pacific Northwest National Labs (PNNL) as a fairly easy way to see if homes meet the Model Energy Code.
If you are unsure which county is in which zone |
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Examples
of Code Compliant Residential Insulation Levels
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MININUM
INSULATION R VALUES
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MAXIMUM
WINDOW & DOOR AREA
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ZONE
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CEILING
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WALL
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FLOOR
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BASEMENT
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MININUM EFFICIENCY HEATING ANDCOOLING |
HIGH COOLING ONLY |
HIGH HEATING ONLY |
HIGH EFFICIENCY HEATING &COOLING |
| DOUBLE PANE METAL WITH THERMAL BREAK (U = 0.67 R = 1.49) | ||||||||
| 1 [1900 HDD] |
30
|
13
|
19
|
5
|
23.2% | 27% | 30.4% | 34.2% |
| 2 [2500 HDD] |
30
|
13
|
19
|
5
|
19.6% | 22.5% | 26.9% | 29.8% |
| 3 [3500 HDD] |
30
|
13
|
19
|
5
|
11.9% | 13.3% | 18.8% | 20.2% |
| 4 [4500 HDD] |
30
|
13
|
19
|
7
|
9.3% | 10.4% | 16.0% | 17.2% |
| DOUBLE PANE WOOD OR VINYL (U = 0.56 R = 1.79 ) | ||||||||
| 1 [1900 HDD] |
30
|
13
|
19
|
5
|
28.5% | 33.3% | 37.4% | 42.4% |
| 2 [2500 HDD] |
30
|
13
|
19
|
5
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24.2% | 27.7% | 33.2% | 36.7% |
| 3 [3500 HDD] |
30
|
13
|
19
|
5
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14.7% | 16.4% | 23.2% | 24.9% |
| 4 [4500 HDD] |
30
|
13
|
19
|
7
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11.4% | 12.8% | 19.8% | 21.2% |
| DOUBLE PANE WOOD OR VINYL, LOW-E ( U = 0.52 R = 1.92) | ||||||||
| 1 [1900 HDD] |
30
|
13
|
19
|
5
|
31.2% | 36.3% | 40.9% | 46.0% |
| 2 [2500 HDD] |
30
|
13
|
19
|
5
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26.4% | 30.3% | 36.3% | 40.1% |
| 3 [3500 HDD] |
30
|
13
|
19
|
5
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16.1% | 17.9% | 25.3% | 27.2% |
| 4 [4500 HDD] |
30
|
13
|
19
|
7
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12.5% | 14.0% | 21.6% | 23.7% |
| DOUBLE PANE WOOD OR VINYL, LOW E, INERT GAS, & 1/2" AIR SPACE OR TRIPLE PANE ( U = 0.43 R = 2.33 ) | ||||||||
| 1 [1900 HDD] |
30
|
13
|
19
|
5
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39.3% | 45.8% | 51.6% | 58.1% |
| 2 [2500 HDD] |
30
|
13
|
19
|
5
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33.4% | 38.2% | 45.7% | 50.5% |
| 3 [3500 HDD] |
30
|
13
|
19
|
5
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20.3% | 22.6% | 32% | 34.4% |
| 4 [4500 HDD] |
30
|
13
|
19
|
7
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15.7% | 17.7% | 27.2% | 29.2% |
1. May use R-19 on sloped ceilings and under HVAC equipment for up to 25% of ceiling area
2. Wall R-values represent the sum of the wall cavity insulation plus insulating sheathing. 25% of gross exterior wall area may have plywood, OSB,or gypsum (garage walls) instead of insulating sheathing.
3. High Heating means a furnace AFUE of 90% or more, or a heat pump HSPF of 7.8 or more. High Cooling means a SEER of 12 or more.High Heating & Cooling means both heating and cooling equipment must meet these minimum efficiencies.
