Oklahoma spans 2 IECC climate zones. Find your exact zone, design temperatures, and get free Manual J load calculations for any Oklahoma location.
Warm - Humid
Mixed - Humid
Based on Climate Zone 3A (Warm - Humid), here are typical HVAC equipment specifications for Oklahoma installations.
Annual Fuel Utilization Efficiency for Oklahoma furnaces
Seasonal Energy Efficiency Ratio for Oklahoma AC systems
Oklahoma's climate zone data ensures proper equipment sizing. No more callbacks from oversized or undersized systems.
Oklahoma building departments require IECC-compliant Manual J calculations. Our tool uses official Oklahoma climate data.
Right-sized systems based on Oklahoma climate data reduce energy costs for homeowners and improve your reputation.
Upload your Oklahoma blueprint and get a professional Manual J load calculation with official climate zone data. First report is FREE.
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Get detailed climate zone information for major cities
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