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Central Heating Radiator Guide

Radiators deliver the heat to keep you warm. They work by convection, whereby hot air rises, circulates round the room, cools and then descends to be heated again. Our convector radiators are all fitted with convector fins that increase the surface area, thus dissipating more heat.

 

Choosing the right radiator
The size of a radiator needed will depend upon the heat requirements for the room. The type will be determined by:

The amount of heat needed in the room

The hanging space, height and width available

Design and appearance

 

Guide to calculating BTU required
Outputs shown are based on a mean water temperature of 80ºC and an ambient room temperature of 20ºC.
  
Multiply Room Height, Width & Length to get its volume in cubic feet.

 

For bedrooms, kitchens and hallways multiply the volume by 4.
For bathrooms, living and dining rooms, multiply the volume by 5.
If the room has large windows or outside walls, increase the total by 10%

Eg. A bedroom 12’ wide x 10’ long x 8’ high has a volume of 960 cubic feet. This is multiplied by 4 to give 3840 btus.

You can now select the appropriate radiator for the Btu required. Always choose a larger output radiator if the exact size is not available.-

To convert Btus to Watts X 0.2931

 

Where to position radiators
The best place to position a radiator is in the coldest part of the room, usually a window. To allow for an adequate air flow around a wall mounted radiator the base of the radiator should be at least 150mm from the floor. If you don’t have enough room for the right sized radiator choose two smaller ones to spread the heat more evenly.

 

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