HVAC

BTU Load Sizing Duct Sizing

HVAC Load & Duct Calculations

These calculations are estimates for planning purposes only — not a substitute for a full ASHRAE-method load calculation, manufacturer equipment specs, or a licensed HVAC professional's judgment. Verify all final sizing against applicable code before installation.

Heat Load Calculator (Sensible / Latent / Total) Required CFM Calculator R-Value / U-Value Calculator Heat Loss/Gain Through a Surface Duct Sizing & Air Velocity Calculator Tons ↔ CFM ↔ BTU Quick Converter