Hawaii: Attic Insulation Payback by County

Hawaii: 5 counties covered

Hawaii spans DOE climate zone 1. Across its 5 counties tracked here, an uninsulated attic saves an estimated $808/year on average once topped up to the recommended R-value — actual savings depend on each county's own heating and cooling degree days, shown below.

• Hawaii County — zone 1, ~$1,786/yr
• Kalawao County — zone 1, ~$617/yr
• Honolulu County — zone 1, ~$560/yr
• Kauai County — zone 1, ~$560/yr
• Maui County — zone 1, ~$518/yr