SEDBUK (Seasonal Efficiency of Domestic Boilers in the UK) is the average annual efficiency achieved in typical domestic conditions, making reasonable assumptions about pattern of usage, climate, control, and other factors.
A new replacement boiler must comply the following requirements
Boiler Type |
Minimum SEDBUK Value |
Natural Gas |
78% |
Natural Gas Back Boiler |
75% |
LPG |
80% |
LPG Back Boiler |
77% |
Oil |
85% |
Oil Combi |
82% |
Soild Fuel |
Not less than HETAS recommended value |
There are two type of gas fuel for boilers; Natural Gas or Piped Gas and Liquid Petroleum Gas (LPG).
Natural Gas Boilers:
Given that piped natural gas is available for cooking, the natural gas boilers are the cheap boiler to install and maintain. They don't require fuel storage facilities and can be automatically controlled hence has lower running cost.
LPG Boilers:
The LPG Boilers are normally adapted from the standard Natural Gas Boilers, often only require smaller main burner jets because LPG supply pressure is higher than natural piped gas.
Running Cost of LPG gas boilers are similar to oil boiler. Like oil boiler the LPG gas boiler also need a storage tank and a fuel feed line from the tank to the boiler.
Types of Gas Boilers
Back Boiler
Free Standing Boiler
Wall Mounted Boiler
Combination Boiler
Condensing Boiler
List of Competent Persons who can service or repair gas boilers and certify compliance to Building Regulations is maintained by CORGI for more information see www.corgi-gas-safety.com
Solid fuel boilers were the first type of domestic heating boilers used in the 50s central heating system. They were introduced by coal utilization council. However due to the need for stoking, coal lost ground to automatically controllable gas and oil. Many solid fuel boilers are now multi-fuel and can burn both wood and coal, but the heat output of the boiler depends on the type of fuel.
Types of Solid Fuel Boilers
Back Boilers and Room Heaters
Free Standing
Cookers
List of Competent Persons who can service or repair solid fuel boilers and certify compliance to Building Regulations is maintained by HETAS for more information see www.hetas.co.uk
The oil must be stored in an oil tank. The risk of environmental damage caused by the oil spillage from the oil tank, feeding pipe line and the boiler will need to be considered. The oil tank must be protected as much as possible from the cold weather because if the oil become very cold it becomes too thick to flow through the feeding pipe line known as waxing.
Oil boiler are best in an outside boiler house ,because oil boilers make some noise and smell.
An oil fired boiler can be controlled just like a gas fired boiler, all forms of automatic controls can be used.
Types of Oil Boilers
Free Standing
Combination Boiler
List of Competent Persons who can service or repair oil boilers and certify compliance to Building Regulations is maintained by OFTEC for more information see www.oftec.org.uk
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