HVAC BTU & AC Tonnage Sizing Calculator
Estimate room heating and cooling BTU requirements and AC tonnage adjusted for ceiling height, climate zone, and insulation.
Input Parameters
Enter dimensions and specifications to estimate materials.
Recommended HVAC Capacity
AC Tonnage
1 Tons
Base Cooling Load
9000BTU
Climate Adjustment
1125BTU
Ceiling Height Adder
1125BTU
Material estimates include recommended trade waste buffer. Always confirm dimensions on site prior to ordering.
How The Calculation Works
Formulas, material coverage assumptions, waste buffers, and rounding standards.
Base cooling and heating load begins at 20 BTU per square foot for standard 8ft ceilings.
Adjusted for ceiling height, climate zone multipliers, sun exposure, and cooking appliances.
1 Ton of Air Conditioning equals 12,000 BTU/hr of cooling capacity.
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Frequently Asked Questions
Practical installation guidance and purchasing tips for hvac btu & ac tonnage sizing calculator.