What is Benchmark?

Benchmark is a nationally recognised scheme that gives manufacturers and installers the responsibility for ensuring best practice for the installation, commissioning and servicing of domestic heating and hot water products, in accordance with the Building Regulations in England and Wales.

 

Benchmark covers:

 

  • Gas heating and hot water systems
  • Hot water storage cylinders
  • Water treatment products
  • Solar thermal systems

 

How does Benchmark work?

 

When the engineer has finished installing your product, they complete the Benchmark commissioning checklist. This is found at the back of the manufacturer's instruction manual.

 

The checklist provides you with evidence that:

 

  • The installer is competent, qualified and committed to providing high quality service
  • The installer works to the Benchmark Code of Practice
  • The product has been installed correctly
  • The installer has given you a demonstration of the product and how it works
  • The installer has given you the manufacturer's user instructions
  • You have signed to say that the installer has given you a demonstration and the handover is complete

 

How Benchmark affects your boiler warranty

 

The terms and conditions for Baxi's parts and labour warranties include the following requirements:

 

  • The installer must complete the Benchmark checklist when he finishes installing the boiler
  • We may ask to see the Benchmark checklist if you make a claim while your boiler is under warranty
  • The warranty must be registered within 30 days of installation
  • The boiler must be serviced every year by a Gas Safe registered engineer

 

What are the benefits of Benchmark?

 

A completed Benchmark checklist gives you evidence that your product has been installed and commissioned correctly.

 

If the engineer has not completed the Benchmark checklist correctly for a gas boiler installation, your warranty will not be valid.

 

This is because the UK's major gas boiler manufacturers, including Baxi, with the support of HHIC, have launched a campaign to rid the industry of incompetent installers. By linking the completion of a commissioning checklist to the warranty of a new boiler, the boiler manufacturers are supporting the large majority of heating engineers who carry out their work competently and professionally. They are also sending a clear message to illegal and cowboy installers that manufacturers will no longer carry the cost for installations that have not been carried out in line with the manufacturers' instructions.

Related FAQs

What is the Boiler Upgrade Scheme?

The Boiler Upgrade Scheme is a Government grant of £7,500 to support with the upfront costs of installing low carbon heating systems, such as an air source heat pump, subject to eligibility. A temporary uplift of £1,500 was also introduced in July 2026 to provide additional support for off-grid property owners.

What is Benchmark?

Benchmark is a nationally recognised scheme that gives manufacturers and installers the responsibility for ensuring best practice when fitting heating and hot water systems, in line with the Building Regulations in England and Wales.

What is a gas safety certificate?

A Gas Safety Certificate is a certification to state that a gas safety check has been carried out by a qualified Gas Safe registered engineer at a property and that it meets the necessary safety standards. 

Are Baxi engineers Gas Safe registered?

Baxi engineers are all Gas Safe registered and undergo regular training so you can be sure the work they do is safe and at the highest standard.

What is sludge made from?

Sludge is a buildup of undissolved components in the water of your heating system. The main component, magnetite, is formed from iron rust when water and oxygen interact with steel pipes and radiators, but it also contains limescale – deposits that form from hard water.