For One Room

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

THIS CALCULATOR IS A GUIDE ONLY

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