Delaware is in IECC Climate Zone 4A (Mixed - Humid). Get accurate Manual J load calculations with official design temperatures and IECC requirements.
Mixed - Humid
Based on Climate Zone 4A (Mixed - Humid), here are typical HVAC equipment specifications for Delaware installations.
Annual Fuel Utilization Efficiency for Delaware furnaces
Seasonal Energy Efficiency Ratio for Delaware AC systems
Delaware's climate zone data ensures proper equipment sizing. No more callbacks from oversized or undersized systems.
Delaware building departments require IECC-compliant Manual J calculations. Our tool uses official Delaware climate data.
Right-sized systems based on Delaware climate data reduce energy costs for homeowners and improve your reputation.
Upload your Delaware blueprint and get a professional Manual J load calculation with official climate zone data. First report is FREE.
Join 10,000+ Delaware contractors who trust AutoHVAC for permit-ready load calculations
Need Delaware HVAC permit forms and building department contacts?
View Delaware Permit Directory