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BTU Calculator

This Calculator is for a guide only.

This calculates the results for one room only. A radiator with insufficient output may never raise the temperature to that required.

Outdoor temperatures, external walls, insulation, heated adjacent rooms (i.e. above, below and to the side) all play a part.

The boiler should be suffient to supply all connected radiators to the sum of their maxmium demand.

Room type: Is the house: Windows type:
Living Room Kitchen Sheltered Single Glazed
Dining Room Bedroom Average Double Glazed
Hallway Bathroom Exposed
Length (Metres) Width (Metres) Height (Metres)
BTU/hr
Watts