The calculation is shown as a range to take into account unknown variables such as external temperature and insulation levels in the home.
Larger rooms may require more than one radiator positioned throughout the room. If you increase the number of radiators, the value will be divided evenly amongst each radiator.
Calculations are measured at Delta-T 50°C).
Room type – Different rooms types require different levels of heating due to heat loss. These factors are based on general room type assumptions.
Glazing – More heat will be lost through single glazing than double glazing so we need to factor this in.
Property type – The exposure of your room affects the heating requirements. A terraced house room maybe surrounded by other heated rooms, a semi-detached house may partly exposed on one side and a detached house room may be exposed to outside walls.
Radiators – If you select 1 radiator you’ll see the total BTU for the room and the single radiator. If you select more than one, the total BTU will be divided amongst the number of radiators.
Other Factors – There may be other factors that will affect the required heating output, such as insulation, floor type and large areas of glass (e.g. french doors). It’s always best to consult a heating installer who can advise you accordingly.