New Hampshire: Attic Insulation Payback by County

New Hampshire: 10 counties covered

New Hampshire spans DOE climate zones 5, 6. Across its 10 counties tracked here, an uninsulated attic saves an estimated $2,071/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.

• Coos County — zone 6, ~$2,372/yr
• Carroll County — zone 6, ~$2,230/yr
• Grafton County — zone 6, ~$2,152/yr
• Sullivan County — zone 6, ~$2,148/yr
• Cheshire County — zone 5, ~$2,066/yr
• Merrimack County — zone 6, ~$2,035/yr
• Belknap County — zone 6, ~$1,984/yr
• Rockingham County — zone 5, ~$1,916/yr
• Hillsborough County — zone 5, ~$1,913/yr
• Strafford County — zone 5, ~$1,897/yr