INSTALLATION
3. HEATING CIRCUIT
All water heating installations should be designed, before product installation, and installed by a competent heating engineer in conjunction with the requirements detailed in the following: The Building Regulations
The Local Water Authority Bylaws
IEE Wiring Regulations
BS 5449: 1
Any other relevant Local Authority Regulations
BS 5449: 1 gives detailed recommendations of water circulation systems.
This manual gives only give basic advice about system design. The full system should be designed with regard to individual requirements of the installation.
Sizing Radiators
The size of radiator required for a room depends the following factors.
a)The temperature that you want it to be able to maintain, the table below is a guide: Ideal Room Temperatures: -
Lounge | 21 C |
Dining Room | 21 C |
Kitchen | 16 C |
Bedrooms | 15 C |
Bathroom | 23 C |
Stairs | 18 C |
b) The heat loss from the room.
The calculations for this depend upon the size of room, number of windows, numbers of doors and, the construction materials used in the building. Too big and the system will overshoot its temperature and be less economical to run, too small and it won't reach its desired temperature. The calculation produces a heat loss figure in watts, of how much heat you need to warm that room up to the design temperature. The calculation can be done by using the radiator manufacturer's heat loss calculators, and should be completed by a qualified heating engineer.
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