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The product selector and range overview gives you easy access to full details on every model in the Clyde Radiators cast iron, steel and designer ranges.
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Heat loss calculator
A heat loss calculator predicts the required heat output of a radiator , or radiators, to keep a room at a comfortable temperature when it is coldest outside (usually -1°C).

It calculates the heat needed to keep the room temperature constant taking into account the heat being lost through outside walls, windows, roofs, etc. Once the heat loss has been determined, one or several radiators can be selected that are both the correct heat output for comfort and the right height, length and depth for their location.

Useful conversion factors :

1 watt = 3.412 Btu/h

1 Btu/h = 0.293 watt
Room Details * Required information
Room Name:
Outside Wall Type:
Window Type:
Window Area (m²):  *
No. of Outside Walls:
Room Dimensions
Room Height (m):  *
Room Width (m):  *
Room Length (m):  * Update
Heat Loss
Room Heatloss: watts btu