Connecticut is in IECC Climate Zone 5A (Cool - Humid). Get accurate Manual J load calculations with official design temperatures and IECC requirements.
Cool - Humid
Based on Climate Zone 5A (Cool - Humid), here are typical HVAC equipment specifications for Connecticut installations.
Annual Fuel Utilization Efficiency for Connecticut furnaces
Seasonal Energy Efficiency Ratio for Connecticut AC systems
Connecticut's climate zone data ensures proper equipment sizing. No more callbacks from oversized or undersized systems.
Connecticut building departments require IECC-compliant Manual J calculations. Our tool uses official Connecticut climate data.
Right-sized systems based on Connecticut climate data reduce energy costs for homeowners and improve your reputation.
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