Free HVAC Sizing Snapshot
Quick HVAC Load Calculator
Get a fast starting-point estimate for heating and cooling capacity based on location, square footage, ceiling height, insulation, sun exposure, windows, occupants, and internal heat sources.
Use this as a conversation starter. This calculator is designed to give a broad planning range. A professional room-by-room Manual J load calculation is still the right next step before selecting equipment, designing ductwork, or making project decisions.
Estimate Your HVAC Capacity
Enter basic home details below. The result updates after you click calculate.
Estimated Equipment Capacity
— BTU / — Tons
Complete the fields and click calculate to see a planning-range estimate.
Need a usable number? We can prepare a professional Manual J load calculation for equipment selection, design review, and project planning.
Why this is useful
It gives homeowners and contractors a quick capacity snapshot before spending money on design work.
Why it is limited
Real HVAC loads depend on windows, orientation, assemblies, infiltration, duct location, ventilation, and room-by-room details.
Best next step
Use this estimate as a starting point, then order a professional Manual J before final equipment selection.