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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 heat 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
    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 
    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
    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