Maryland 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 Maryland installations.
Annual Fuel Utilization Efficiency for Maryland furnaces
Seasonal Energy Efficiency Ratio for Maryland AC systems
Maryland's climate zone data ensures proper equipment sizing. No more callbacks from oversized or undersized systems.
Maryland building departments require IECC-compliant Manual J calculations. Our tool uses official Maryland climate data.
Right-sized systems based on Maryland climate data reduce energy costs for homeowners and improve your reputation.
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