Heating & Cooling

Material quantity calculators using standard densities and coverage rates, with sensible waste margins.

BTU Calculator

Estimate rough heating/cooling output in watts and BTU/h from room volume and insulation quality, for planning purposes.

Convert a cooling load in BTU/h (or a rough area estimate) into air-conditioning tonnage and kilowatts.

Calculate air changes per hour (ACH) from airflow and room volume, or the airflow needed to reach a target ACH.