Heat Calculator

To arrive at the capacity/size of boiler you require, enter the room dimensions and number of water cylinders required - then print off this form for reference.
*For any room with two or more external walls, please tick the box to add 10% to your calculation.

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Living accom

LxWxH in feet

Cubic feet
*2+ External
Btu/hr required
Lounge x x =  
Dining room x x =  
Study x x =  
Playroom x x =  
Other x x =  
Bedroom and circulation areas
Bedroom 1 x x =  
Bedroom 2 x x =  
Bedroom 3 x x =  
Bedroom 4 x x =  
Bedroom 5 x x =  
Kitchen x x =  
Bathroom x x =  
Utility x x =  
Hall x x =  
Landing x x =  
Other x x =  
  No. of Water Cylinders required      
  Total boiler size required in Btu/hr