BTU
British Thermal Unit — the heat to raise one pound of water 1°F, and HVAC's sizing currency. Cooling loads run 20–25 BTU per square foot before climate adjustment; 12,000 BTU equals one ton of air conditioning.
Where this appears in real estimates
This term isn't trivia — it's a working variable. These tools use it directly:
- btu calculator — Heating and cooling BTUs from room area, climate and insulation.…
- hvac size calculator — Whole-home HVAC tonnage estimate from conditioned area and climate.…
Go deeper
- Asphalt vs Concrete Driveway — head-to-head decision guide
- Yard Drainage Fix — full project walkthrough
- Excavation in New York — local pricing & climate
- Read the field guide on the blog — practitioner-level detail
- Related engineering article — from our licensed engineer
Reviewed: · Part of the CalculatorAsphalt Construction Glossary · Sources: see methodology & standards.