image of a calculator If you need a quick idea of how much heat you need for a room, please use the guide below.

Please bear in mind the calculations returned should be taken as a guide only and are not detailed heat loss calculations.

Whilst this guide can be used for multiple rooms, it treats each room individually and assumes adjacent rooms are unheated.

If your room/property does not fit into the descriptions provided, or you would like a more detailed assessment please visit the heating design section in the left hand menu, or contact our customer care team.

About Your Room

What room do you want to heat:
What are the dimensions of the room: Length m
Breadth m
Height m
What is the TOTAL window area: m2
How many of the walls are also outside walls:
What level within the property is the room on:
(for middle floor rooms, select single storey)

About Your Property

Construction Type 'U' Value
What is the main type of outside wall:
How much roof insulation do you have:
What type of windows do you have:
What is the floor construction:


Please enter the approximate external temperature:
What is the approximate room temperature: (change if required)

Select a Dimplex Product

What Dimplex product do you want a recommendation for:

Name and Registered Office: Dimplex - a division of the GDC Group, Millbrook House, Grange Drive, Hedge End, Southampton, Hants, SO30 2DF, United Kingdom.
Company No.1313016 EEE Producer Registration Number WEE/GE0057TS
WEEE Distributor Take Back Scheme - Registration ID: 6131
This is an official website of GDC Group Limited. The GDC Group manages the Dimplex brand.
Neither the GDC Group nor Dimplex are associated with any other website containing the Dimplex brand name