On this page
- What is the Benchmark service record?
- What goes into the Benchmark checklist?
- Why does the Benchmark record matter for your warranty?
- Why do buyers and solicitors ask for it?
- What should you do if your Benchmark record is missing?
- Are digital boiler records as good as the paper logbook?
- Getting your service recorded properly in Stoke-on-Trent
- Frequently asked questions
Quick answer
The Benchmark record is a checklist and logbook supplied with most UK boilers. The installer completes the commissioning checklist when the boiler is fitted, and a Gas Safe registered engineer fills in a service record entry at every annual service. Manufacturers use it for warranty claims, and buyers and solicitors often ask for it when a house is sold.
Key takeaways
- Benchmark is the boiler's logbook: commissioning details plus a record of every service.
- Manufacturers usually check it before accepting a warranty claim.
- Buyers and solicitors often ask for it when a property changes hands.
- If it is lost, a combination of installer, manufacturer and Gas Safe records can fill gaps.
- Digital records are increasingly common, but keep your own copy too.
Ask most homeowners where their boiler logbook is and you will get a shrug, or a vague answer about a drawer. Yet those few pages at the back of the installation manual can decide whether a manufacturer pays for a repair, or whether a buyer's solicitor raises questions during a sale. Now that spring has arrived and the heating is easing off, it is a good moment to find yours.
What is the Benchmark service record?
Benchmark is an industry scheme that gives each new boiler a standard commissioning checklist and service record. The installer fills in the checklist when the boiler is commissioned, and the engineer adds an entry each time it is serviced. Together they form a history showing the boiler was installed and maintained correctly.
On most boilers it is printed in the back of the installation and user manual. Some manufacturers and installers now complete it digitally instead, with the record held online or in an app and a copy sent to the homeowner.
What goes into the Benchmark checklist?
The commissioning checklist records how the boiler was set up on day one: gas rate and pressure, combustion readings, the controls fitted, whether the system was cleaned and treated with inhibitor, and whether a filter and scale protection were installed. Each later service entry records the date, the engineer, their Gas Safe number and the combustion readings.
| Section | Completed by | When |
|---|---|---|
| Commissioning checklist | The installing engineer | When the boiler is fitted and commissioned |
| Controls and system treatment details | The installing engineer | At installation |
| Service record entries | The servicing engineer | At every annual service |
| Notes on parts replaced | The engineer doing the work | When relevant, at service or repair |
The combustion readings in each entry are the same ones taken during flue gas analysis, so comparing entries over the years shows how the boiler is ageing.
Why does the Benchmark record matter for your warranty?
Most manufacturers make their warranty conditional on the boiler being installed correctly and serviced every year by a Gas Safe registered engineer. The Benchmark record is how you prove both. If you need a warranty repair, the manufacturer or its engineer will usually ask to see the commissioning checklist and a full run of service entries.
Gaps can cause problems. A missing year, or a service with no readings recorded, may give the manufacturer grounds to question a claim. That is why it is worth checking the engineer has filled it in before they leave, and why the interval explained in how often a boiler should be serviced matters beyond safety alone.
Why do buyers and solicitors ask for it?
When a house is sold, the buyer's solicitor usually asks about the heating system, and the seller's property information forms cover it too. A complete Benchmark record, alongside the Building Regulations compliance certificate from installation, shows the boiler was legally fitted and properly maintained.
If the paperwork is missing, a buyer may ask for a gas safety inspection before completing. For either side of a sale, we offer a home buyers and sellers gas report for £125, giving an independent written view of the gas appliances and installation.
What should you do if your Benchmark record is missing?
Do not panic. A missing logbook does not mean the boiler is unsafe, and much of the information can usually be recovered or rebuilt. The aim is to piece together proof of installation and servicing, then keep a proper record from now on.
- Ask the previous owner or the installer. Installers often keep copies of commissioning paperwork.
- Contact the manufacturer. If the boiler was registered for warranty, they may hold installation details, and most offer manuals to download.
- Check the building regulations notification. The Gas Safe Register records notified installations, and you can request a copy of the compliance certificate.
- Gather old service paperwork. Separate service sheets or invoices from past engineers still show the history.
- Start a fresh record at your next service. Your engineer can record the service and readings, and you keep it with any recovered documents.
Are digital boiler records as good as the paper logbook?
Yes, as long as you can get at them. A digital Benchmark or service record carries the same information and cannot be lost in a drawer. The risk is that it sits in an installer's or manufacturer's system you cannot easily reach, so make sure you get a copy emailed or downloadable.
If you have a paper logbook, keep using it, and ask your engineer to fill in the next entry as normal. A mix of paper and digital records is fine, provided every service is recorded somewhere you can produce it. For more on what the installer should hand over when a boiler is fitted, see our complete guide to boiler installation.
Getting your service recorded properly in Stoke-on-Trent
At every annual boiler service in Stoke-on-Trent, our engineers complete your service record with the readings taken on the day. If your logbook is missing, have whatever paperwork you have ready and we will record the service so your history starts again from there.
We cover Derbyshire as well as Staffordshire, including boiler service in Ashbourne and boiler service in Derby. To book, call 07896 677083.
Frequently asked questions
Is the Benchmark record a legal requirement?
No. Benchmark is an industry scheme rather than a law. What is required by law is that a new boiler installation is notified under the Building Regulations, which results in a compliance certificate. Benchmark sits alongside that as the standard way to record commissioning and servicing, and manufacturers rely on it for warranties.
Does a repair need to be written in the Benchmark record?
It is good practice. The service record pages usually have space to note parts replaced, and recording a repair helps the next engineer understand the boiler's history. If there is no room, keep the repair invoice or job sheet with the manual so the information is not lost.
My boiler is too old to have a Benchmark record. Does that matter?
Older boilers may predate the scheme or have a different style of logbook. It does not affect safety, but keeping your own record of each service, with the date, engineer and readings, is still worthwhile. It helps with diagnosing faults and gives a buyer confidence if you sell.
Who can fill in the Benchmark service record?
The service record should be completed by the Gas Safe registered engineer who carried out the service, with their name, registration number, the date and the readings. A homeowner should not fill it in themselves, as the entry is a record of work done and checks carried out by a qualified engineer.
Sources and further reading
Gasmaster Plumbing & Heating has served Stoke-on-Trent since 2005. Every article is written by our Gas Safe registered engineers (reg. 220932) from day to day work on boilers, heating and gas appliances across Staffordshire, Cheshire and Derbyshire.
