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Insulation R-Value Guide
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HVAC
Insulation R-Value Guide
Determine appropriate insulation R-value for your climate zone.
Climate Zone
Zone 1 (Hot — FL, HI, south TX)
Zone 2 (Warm — CA, GA, AZ)
Zone 3 (Moderate — NC, VA, TX)
Zone 4 (Cold — NY, PA, IL)
Zone 5 (Very Cold — MN, WI, MT)
Zone 6 (Subarctic — ND, SD, ME)
Zone 7 (Arctic — AK)
Area to Insulate
Attic ceiling
Exterior walls
Floors above unheated space
Basement walls
Calculate
Min R-Value
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Recommended
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