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New and Replacement Boilers

Domestic Gas BoilerThis page contains information regarding the provision of new and replacement domestic central heating boilers, including a list of approved competent person schemes for gas, oil and solid fuel combustion appliances.

Introduction

From 1st April 2005 the energy performance standard for new and replacement gas fired hot water central heating boilers was raised. In normal circumstances when a new boiler is installed or an existing one is replaced, you will need a condensing type boiler to meet the higher energy efficiency standards

As of 1st April 2007 similar standards now apply to new and replacement oil fired hot water central heating boilers.

Condensing boilers are more efficient than the traditional boilers and produce less carbon dioxide. They work by reducing the amount of heat that escapes out of the flue, converting approximately 86 per cent or more of the fuel they burn into useful heat. In comparison a non condensing boiler converts as little as sixty per cent of the fuel used into heat.

Boiler efficiency

A boilers efficiency is know as its SEDBUK (Seasonal Efficiency of Domestic Boilers in the United Kingdom) rating. You can check the efficiency of your current or proposed boiler on the boiler database at www.sedbuk.com [external link].

As a simple guide to efficiency, a scheme has been created with SEDBUK efficiency bands assigned to boilers on an 'A' to 'G' scale. The band may be used on product literature and labels, though there is no requirement for manufacturers to do so.

Band

SEDBUK range (percentage)

A

90 and above

B

86 to 90

C

82 to 86

D

78 to 82

E

74 to 78

F

70 to 74

G

below 70

Important changes to gas safety

Gas Safe Register LogoFrom the 31st March 2009 it has become illegal for any person to carry out works to gas services and appliances other than a person registered on the Gas Safe Register. Gas Safe Register will be the new name and the official mark for gas safety in Great Britain which replaces the CORGI (Council for Registered Gas Installers) gas registration scheme. Further information can be found within the Gas Safe Register consumer leaflet below.

Gas safe register consumer leaflet (PDF Document, 837.56 Kb)

Installation of boilers

Boilers of any fuel type must always be installed by a person who is both suitably qualified and competent. They should also hold a Certificate in Energy Efficiency for Domestic Heating or an equivalent qualification.

Gas Combustion Appliances

For gas fired combustion appliances, the installer that you employ must be a member of the Gas Safe Register.

For Oil Fired Combustion Appliances (Including Liquid Biofuels)

The installer that you employ can be registered on any of the following scheme types:-

  1. APHC (Association of Plumbing and Heating Contractors (Certification) Limited), however an APHC contractor cannot be used for appliances over 100 kilowatts output or in buildings of more than three storeys),
  2. BESCA Limited (Building Engineering Services Competence Accreditation),
  3. CORGI (Benchmark Certification Limited),
  4. ELECSA (ECA Certification Limited),
  5. HETAS (HETAS limited),
  6. NAPIT Registration Limited (National Association of Professional Inspectors and Testers),
  7. NICEIC (Ascertiva Group Limited) or
  8. OFTEC (Oil Firing Technical Association Limited) registered installer.

Gas Combustion Appliances (Including Biomass)

The installer that you employ can be registered on any of the following scheme types:-

  1. APHC (Association of Plumbing and Heating Contractors (Certification) Limited), however an APHC contractor cannot be used for appliances over 100 kilowatts output or in buildings of more than three storeys),
  2. BESCA Limited (Building Engineering Services Competence Accreditation),
  3. CORGI (Benchmark Certification Limited),
  4. ELECSA (ECA Certification Limited),
  5. HETAS (HETAS limited),
  6. NAPIT Registration Limited (National Association of Professional Inspectors and Testers) or
  7. NICEIC (Ascertiva Group Limited).

In all cases you should check that your installer has the required qualifications and is registered on the appropriate competent persons scheme for the work they undertake.

Certification

In exceptional circumstances it is permissible to install a non condensing boiler instead of a condensing boiler, provided that an assessment of the property has been undertaken by the installer and this confirms that the additional cost of installing a condensing boiler is exceptionally high. The assessor must identify the lowest additional cost for an installation anywhere in the building, irrespective of the boiler position chosen by the owner. Where it is unreasonable to install a condensing boiler the installer must provide a declaration stating this for you to retain as proof.

Once your boiler installation has been completed by the registered installer, you will receive a building regulations compliance certificate direct from the relevant competent persons scheme provider to show that the work meets with the requirements of the building regulations. The scheme provider will also notify the council of the installation.

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