It’s crucial to know the output of your underfloor heating system as this ensures your room is heated to the necessary temperature. There’s no point installing a heating system if you don’t know how to use. To therefore tell how much heat you need to heat a room, you’ll need to know the heat loss and then choose an underfloor heating system with a heat output to match.
Size of the floor
The size of the heated floor area is directly linked to the heat output as the larger the heated area, the higher the maximum heat output of the system. The size of the heated floor area in relation to the overall room size also affects the output as the larger the room gets, the higher the heat loss. If the heated area is much smaller than the overall room size, it may be difficult for an underfloor heating system to create enough heat for primary heating unless the home is well-insulated.
Floor Temperature & Floor Type
The floor temperature also will affect the heat output where, the higher the floor temperature, the higher the heat output from the floor. It’s important to know your floor type, as this can impact the temperature. Solid materials like tile and stone have good thermal conductivity meaning that the heat can better transmit from the heating element to the floor surface. Tile and stone can also be heated to 29 +°C to provide better higher output. Soft floor materials such as wood have a comparatively poor conductivity and can also be heated to 27 +°C. This means there will be a certain maximum heat output depending on the area size.
The maximum power of the system is normally specified in Watts per square metre. If your floor is well insulated and you have a reasonably modern home, the power of an underfloor heating system usually needs to be between 65-85W/m² to give the required output.
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