Heat Requirement Calculator | Geyser

Use the options below to calculate your heat output requirements for both central heating systems (BTUs) and electric heating (watts). You can save every room in your house and then print out the results.

Heating Type

Preferred Metric

Central Heating: Requirements for Water Based, Piped system.

Electric Heating: Requirements for Electric Only heating.

Room Location

Room Name (Optional)

L (m):

W (m):

H (m):

Note: Average British Room Height is 2.4 metres / 8 foot high

Window Glazing

Window Area

External Wall Type

External facing wall length

Total Lengh of all walls facing outside, in a typical home this will be equal to the length+width of the room.

This Room

Save this room

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Heat Requirement Calculator | Geyser

This Room

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