Heating

Boiler size calculator

Example: Boiler output: at least 29.3 kW

Heat loss calculator

Example: Heat loss: 476 W (0.48 kW) at the design temperature

Hot water cylinder size calculator

Example: Cylinder: 210 litres, about 4.1 h to heat from cold (indicative)

Radiator size calculator

Example: Buy at least 2,996 W at ΔT50 (10,222 BTU/h)

Air conditioning size calculator

Example: Cooling: 1,344 W (4,586 BTU/h): a 5,000 BTU/h unit

Expansion vessel size calculator

Example: Vessel: at least 6.77 L (indicative)

Heat pump size calculator

Example: Heat pump: at least 6.0 kW at your design conditions

Radiator ΔT converter

Example: Output at ΔT30: 1,030 W

Underfloor heating calculator

Example: 100.0 W/m² (1500 W); 100 m of pipe

kW to BTU converter

Example: 1.5 kW = 5,118 BTU/h

Heating upgrade estimator

Plan a heating upgrade: room heat loss, radiator sizes, boiler or heat pump size, cylinder and expansion vessel in one place.

Plumbing

Insulation and ventilation