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Size Guide

Ensuring your heat pump is the right size for your home is just as important as choosing the right style.
Correct sizing is crucial in ensuring you receive optimal comfort levels for your home. Selecting a heat pump which is too small for the area you are trying to heat will result i increased noise, poor performance and higher power consumption as the unit works to achieve heating levels beyond its capability. Installing a heatr pump which is too large will create draughts and uneven heat output. Factors such as the age of the home, adequate insulation, the amount of glass windows and the climate of the area you live in must also be considered before installation takes place, as these have direct bearing on the performance required. Below is a guide to help you determine the approximate heating requirement of your room.

New or Well Insulated House Guide

Room Size Ceiling Height Room Volume Room Size Factor kW Heating
Small Rooms
4m x 3m 2.4m 28.8m³ 55 watts per m³ 1.6kW
4m x 4m 2.4m 38.4m³ 55 watts per m³ 2.1kW
4m x 5m 2.4m 48.0m³ 55 watts per m³ 2.6kW
5m x 5m 2.4m 60.0m³ 55 watts per m³ 3.3kW
6m x 5m 2.4m 72.0m³ 55 watts per m³ 4.0kW
Medium Rooms
6m x 6m 2.4m 86.4m³ 55 watts per m³ 4.7kW
6m x 7m 2.4m 100.8m³ 55 watts per m³ 5.5kW
7m x 7m 2.4m 117.6m³ 55 watts per m³ 6.5kW
Large Rooms
7m x 8m 2.4m 134.4m³ 55 watts per m³ 7.4kW
8m x 8m 2.4m 153.6m³ 55 watts per m³ 8.4kW

Cold Damp House or Lots of Glass Guide

Room Size Ceiling Height Room Volume Room Size Factor kW Heating
4m x 3m 2.4m 28.8m³ 65 watts per m³ 1.9kW
4m x 4m 2.4m 38.4m³ 65 watts per m³ 2.5kW
4m x 5m 2.4m 48.0m³ 65 watts per m³ 3.1kW
5m x 5m 2.4m 60.0m³ 65 watts per m³ 3.9kW
6m x 5m 2.4m 72.0m³ 65 watts per m³ 4.7kW
6m x 6m 2.4m 86.4m³ 65 watts per m³ 5.6kW
6m x 7m 2.4m 100.8m³ 65 watts per m³ 6.5kW
7m x 7m 2.4m 117.6m³ 65 watts per m³ 7.6kW
7m x 8m 2.4m 134.4m³ 65 watts per m³ 8.1kW