What is the Benchmark commissioning checklist?

In the back of nearly every domestic boiler's installation manual sit a few pages most householders never read: the Benchmark Checklist. For the installing engineer it is ten minutes of paperwork at the end of a long day. For the customer it is the document their warranty leans on for the next decade, and one of the first things a manufacturer asks about when a claim is made. This guide covers what the scheme is, who fills the checklist in, why the first 30 days after installation matter, and which pieces of paper are worth keeping.

What is the Benchmark scheme?

Benchmark is a national scheme, managed by the Heating and Hotwater Industry Council (HHIC), that has promoted quality in the installation, commissioning and servicing of domestic heating and hot water products since 1999. Its best-known artefact is the checklist: a structured commissioning record printed in the back of the manufacturer's installation instructions, and increasingly completed digitally instead. It is not a regulator and it does not issue certificates of its own. It is the industry agreeing what a properly commissioned appliance looks like on paper, with the manufacturers behind it, which is exactly why their warranty departments treat it as the reference document.

Who completes the Benchmark checklist?

The installing engineer, at commissioning, on the day. It is not the customer's form, and not something to reconstruct from memory a fortnight after the van left. The checklist records what was actually measured and set up when the appliance was commissioned, so its value depends entirely on being completed at the appliance with the manual open. The customer's part is the handover: a good installer walks the customer through the completed checklist and the controls, then leaves the record with the manual, or shows them where the digital version lives. The checklist also carries a service interval record, which each year's service visit should add to.

What does the checklist actually record?

• The appliance details and the installer's details, including their Gas Safe registration number.
• Confirmation that the appliance was installed and commissioned in line with the manufacturer's instructions.
• The commissioning results the manual asks for, measured on the day rather than assumed.
• The controls fitted with the system, and confirmation the customer was shown how to use them.
• System preparation work, such as cleaning and water treatment, where the manual requires it.
• The service interval record, which collects each annual service against the same appliance.

You will notice this guide does not tell you what any of those commissioning values should be. That is deliberate. The correct figures are specific to each appliance and belong to that appliance's installation instructions, which is the document the engineer works from at the wall. What a homeowner or landlord needs to check is simpler: that the sections are filled in rather than blank, and that the installer's registration details are on it.

Is the Benchmark checklist a legal requirement?

Not by name, but it is doing legal work. Commissioning a new heating appliance properly is a Building Regulations requirement, and the scheme's own position is that completing the Benchmark Checklist is a means of meeting the commissioning requirements within Part L. It helps to keep three documents apart here, because they get muddled constantly. The Benchmark checklist is the commissioning record. The Building Regulations compliance certificate is a separate document that arrives after the installer notifies the installation, which for gas boilers happens through Gas Safe Register. And the CP12 is the annual landlord gas safety record, which has nothing to do with installation day at all. Three documents, three jobs, and a well-run install produces the first two without the customer having to chase either.

Why do the first 30 days matter?

Because that is typically the warranty registration window. Most manufacturers require a new boiler to be registered for its warranty within a set period of installation, commonly 30 days, and the long extended warranties that sell boilers are conditional: the appliance must be commissioned properly with the Benchmark checklist completed, registered in time, and then serviced every year with the service record kept up. Miss the registration window and the headline warranty can shrink to something much shorter. A blank checklist has a similar quality: it is the classic reason a warranty claim turns awkward years later, when the manufacturer asks for commissioning evidence nobody can produce. The fix costs nothing; it just has to actually happen on the day.

What is digital Benchmark?

The same record, moved off paper. Benchmark now runs a digital checklist through an app and a web platform, and manufacturers are increasingly steering installers to it instead of the printed pages in the manual. The practical differences are the useful part: a digital record is completed on the phone at the appliance, stored electronically rather than in a kitchen drawer, and does not go missing when the manual does. If your installer commissions digitally, the paper pages may stay blank, which is fine: just ask the installer to confirm the checklist is completed and show you where the record lives.

What should landlords and homeowners keep?

• The completed Benchmark checklist, on paper in the manual or as the digital record's confirmation.
• The Building Regulations compliance certificate that follows the installer's notification.
• The warranty registration confirmation, with the expiry date noted somewhere you will see it.
• Every annual service record, since the warranty depends on the chain staying unbroken.
• For landlords, the CP12 sits alongside all of this: the annual gas safety record is a separate duty with its own clock.

How do engineers keep commissioning paperwork under control?

The failure mode is rarely the checklist itself. It is the follow-through: the registration that was going to be done back at the house, the handover pack that never got printed, the service record that lives in a different app from the job. Commissioning paperwork is record-keeping, which is to say it is exactly the class of work that should not depend on anyone's memory. Manifold keeps jobs, certificates and records against the property, so the install visit, the documents it produced and every service and safety check that follows sit in one history, and the annual work that keeps a warranty alive gets chased automatically instead of remembered occasionally.