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Stove kilowatt calculator

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Our stove kilowatt calculator will give you a good idea of the maximum heat output needed for your room in kW. If the room has stairs leading off it, is badly insulated, or has many windows/doors then you will need to adjust the heat output needed upwards. Enter the rooms dimensions below in mm or feet. Our team would also love to help you one-to-one with picking the sizing and type of stove for your needs. We can also calculate heat outputs for whole house heating systems.

KiloWatt Calculator
Measured in..
Width
Height
Length
Insulation

A note about the types of houses on here:

Uninsulated: is either a townhouse with double brick walls, single glazing, uninsulated roof, and poor draughtproofing, or a farmhouse with stone walls (and the rest of the details the same).

Uninsulated Townhouse with cavity: has cavity walls, single glazing, 50mm roof insulation, and poor draughtproofing.

Renovated Townhouse without cavity: has double brick walls, double glazing, 100mm roof insulation, draughtproofing and floor insulation.

Renovated Townhouse with cavity: has insulated cavity walls, double glazing, 100mm roof insulation, draughtproofing and floor insulation.

Newbuild: is a house built to current building regs.

Passive House: is a mega insulated house with heat recovery insulation and the works.


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