New Hampshire is in IECC Climate Zone 6A (Cold - Humid). Get accurate Manual J load calculations with official design temperatures and IECC requirements.
Cold - Humid
Based on Climate Zone 6A (Cold - Humid), here are typical HVAC equipment specifications for New Hampshire installations.
Annual Fuel Utilization Efficiency for New Hampshire furnaces
Seasonal Energy Efficiency Ratio for New Hampshire AC systems
New Hampshire's climate zone data ensures proper equipment sizing. No more callbacks from oversized or undersized systems.
New Hampshire building departments require IECC-compliant Manual J calculations. Our tool uses official New Hampshire climate data.
Right-sized systems based on New Hampshire climate data reduce energy costs for homeowners and improve your reputation.
Upload your New Hampshire blueprint and get a professional Manual J load calculation with official climate zone data. First report is FREE.
Join 10,000+ New Hampshire contractors who trust AutoHVAC for permit-ready load calculations
Need New Hampshire HVAC permit forms and building department contacts?
View New Hampshire Permit Directory