Heating

Heating tools: size a gas heater or heat pump, estimate heat-up time, work out heating cost from the energy rate you enter, and size a solar collector array.

Heater SizeSize a pool heater in BTU/hr from your pool volume, temperature rise and target heat-up time. Includes the sizing formula and a worked example.Heat-Pump SizeSize a pool heat pump in BTU/hr from your pool volume, temperature rise and a realistic run time, with the energy formula and a worked example.Heat-Up TimeFind out how long it takes to heat your pool: enter volume, temperature rise and heater BTU rating. Includes the formula and a worked example.Heating CostEstimate the cost to heat your pool with gas or a heat pump using your own energy rate. Free calculator with the formula and a worked example.Solar HeaterSize a solar pool heating system: estimate the collector area you need from your pool surface. Includes the rule of thumb and a worked example.

Every Heating tool is calculated server-side — visible immediately — with its formula, a worked example and a reference table. Background reading is in the guides.