Heating Calculators & Planners

Radiator BTU Calculator

Work out the BTU output you need to heat a room properly based on its size and type.

Log Burner Size Calculator

Calculate the stove kW rating that suits your room volume so it heats properly without overpowering it.

Air Conditioner Cooling Calculator

Work out the BTU cooling capacity you need for a room based on its size and how much heat it generates.

Electric Heater Running Cost Calculator

Estimate the running cost of an electric heater based on its wattage and how long you run it.

Gas vs Electric Patio Heater Cost Calculator

Compare the annual running cost of a gas patio heater against an electric one, based on your own bottle price, electricity rate and usage.

Fireplace Hearth Size Calculator

Work out the minimum hearth size needed around your fireplace opening.

Flue Liner Length Calculator

Work out how much flue liner you need between your stove and chimney pot.

Patio Heater Gas Bottle Runtime Calculator

Work out how many hours a gas bottle will run your patio heater for.

Thermostat Turn-Down Savings Calculator

Estimate how much you could save on heating bills by turning your thermostat down.

Underfloor Heating Output Calculator

Check whether underfloor heating alone can meet a room’s heat output needs.