Heating

Heat loss, furnace and heat pump sizing, and radiators at real flow temperatures.

• Furnace Size Calculator Turns a heat loss figure into the furnace input rating to buy, allowing for efficiency and a sizing margin.
• Heat Pump Size Calculator Sizes a heat pump in tons against the heating and cooling loads, and works out the backup heat needed at design temperature.
• Heating BTU Calculator How much heat a room or a house needs on the coldest day, in BTU per hour and kilowatts.
• Radiator Size Calculator Converts a room’s heat requirement into the radiator output to specify, corrected for your actual flow temperature.