CONSTRUCTION CALCULATORS

Energy & HVAC Calculators

Heating, cooling, solar and insulation estimates. All tools are free and require no sign-up.

Heating & Cooling BTU CalculatorEstimate room heating or cooling capacity. › Solar Panel CalculatorEstimate panel count and nominal solar capacity from usable roof area. › Heat Loss CalculatorEstimate basic transmission heat loss through a building surface. › Air Conditioner Size CalculatorEstimate a starting air-conditioner capacity by room size. › CFM CalculatorEstimate ventilation airflow from room volume and air changes. › Furnace BTU CalculatorEstimate preliminary furnace output from room volume. › Refrigerant Line Charge CalculatorEstimate additional refrigerant for line length beyond the included allowance. › Window Air Conditioner Size CalculatorEstimate a starting window AC capacity from room dimensions. ›