A guide to building regulations relevant to new boilers and heating systems
Major change to boiler regulations
From April 2005 all new and replacement boilers will have to be high efficiency condensing boilers (with exemption in certain circumstances). This is the date when another amendment to Part L Building Regulations will come into force. All new and replacement boilers will have to be within the A and B energy efficiency rating bands.
Below is a brief guide to the building regulations that now apply to the installation of replacement boilers, new installations and system upgrades.
The replacement of gas and oil fired boilers and hot water cylinders are now covered under building regulations Approved Document Part L 1, England and Wales. Certification of compliance to Part L 1 can be made by a competent person, for gas, a CORGI registered installer and for oil, an OFTEC registered installer. A log book should also be kept of work undertaken. Alternatively local building control notices can be obtained.
New boilers must meet energy efficiency standards.
Hot water cylinders must meet energy efficiency standards.
Minimum requirements are set for controls and systems.
Fully pumped systems should be used.
Older gravity system will require upgrading to a fully pumped system.
Thermostatic radiator valves should be fitted to at least the bedroom radiators.
An automatic bypass valve should be fitted.
A room thermostat is required.
A cylinder thermostat is required.
Wired interlocking is required switching off both the pump and boiler when there is no demand for heat.
This is not a comprehensive list
For combination boilers not all of the above is applicable.
Further information can be obtained from your local building control office or on the internet.
(Try the ODPM website or your district council website.)
If work has not been certified there may be problems if you should try to sell the property.
Check www.boilers.org.uk/ for more information on boiler efficiency ratings, running costs etc.