HVAC & Airflow
2 CalculatorsBTU sizing, heating & cooling loads, AC tonnage, duct sizing, CFM airflow, and ventilation calculators.
Available Calculators in Suite
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HVAC BTU Heating & Cooling Load Calculator
Calculate heating and cooling BTU/hr loads, recommended AC tonnage (1.5 to 5 tons), mini-split sizing, and sensible/latent heat gains across climate zones.
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Deterministic Engine1 Inputs
HVAC Duct Sizing & CFM Airflow Calculator
Calculate round duct diameters, rectangular equivalent dimensions, air velocity (FPM), friction loss, and room branch distribution for HVAC systems.
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