#Benchmark Certificates and Boiler Warranties: What Installers Need to Know

Ten-year warranties sell boilers. But the small print behind every one of them says roughly the same thing: no completed Benchmark, no properly commissioned appliance, no annual service history — no claim. The Benchmark checklist takes ten minutes at handover, and skipping it is the cheapest way to turn a warranty repair into an argument between your customer, the manufacturer and you. Here's what Benchmark actually is, what to record, and how to keep the records that make claims painless.

#What Benchmark is

Benchmark is the industry-standard commissioning checklist and service record scheme, administered by the Heating and Hotwater Industry Council (HHIC). In its paper form it's the checklist printed in the back of the installation manual of virtually every domestic boiler sold in the UK — plus equivalent checklists for hot water cylinders and other heating products.

Completing it does two things:

1. Records that the appliance was installed and commissioned to the manufacturer's instructions — the readings, the system checks and the handover, signed and dated.
2. Creates the baseline for the service history — the back pages hold the annual service entries that keep the record (and usually the warranty) alive.

It isn't a Gas Safe document and it isn't the Building Regulations notification — it sits alongside both. The Gas Safe notification generates the Building Regulations compliance certificate; Benchmark is the evidence the appliance was commissioned properly, which is itself part of complying with the Building Regulations requirement to commission.

#Why manufacturers tie warranties to it

Extended warranties — 7, 10, 12 years — are underwritten on the assumption the boiler was set up correctly and maintained. So manufacturers typically make three things conditions of the warranty:

• A completed Benchmark checklist at installation, signed by the Gas Safe registered installer
• Registration/notification — the Gas Safe notification within 30 days, and usually registering the appliance with the manufacturer for the extended term
• Annual servicing, evidenced by the service record pages being completed each year

Miss any leg and the manufacturer has grounds to reduce the claim to the statutory guarantee, charge for the visit, or refuse it. The engineer who attends a warranty call will ask for the Benchmark record — and an empty checklist in the back of the manual is the first thing that gets photographed.

#What gets recorded at commissioning

The exact fields vary by appliance, but the boiler checklist follows a consistent pattern. Treat it as the definition of "commissioned":

Two of these deserve emphasis because they're the ones most often skipped and most often cited in disputes:

• The gas rate and combustion figures prove the appliance was actually set up, not just plumbed in. Write down the real numbers, not the badge numbers.
• The water treatment entries (cleanse and inhibitor to BS 7593) are the manufacturer's defence against sludge-related heat exchanger failures — the single most common warranty battleground. If you powerflushed the system, a powerflush certificate is the evidence that supports the Benchmark entry.

Cylinders have their own Benchmark checklist — storage temperature, thermostat settings, expansion and safety device checks, flow rates and the customer demonstration — recorded on a cylinder commissioning certificate with the same warranty implications.

#Digital Benchmark

Benchmark no longer has to mean the paper pages in the back of the manual. HHIC supports digital completion, and manufacturers accept electronic Benchmark records — what matters is that the required fields are completed, signed and available to the customer, not the format. Digital records have practical advantages the paper version can't match: they don't get lost when the manual goes in a kitchen drawer for a decade, they're legible, and you keep your own copy against the job for the day a claim or a complaint surfaces.

#The annual service pages

The commissioning checklist is only half the document. The service record pages are what keep an extended warranty valid year after year — most manufacturers require a service every 12 months, recorded with the date, the readings and the engineer's details.

Practical points:

• The servicing engineer doesn't have to be the installer, but they must be Gas Safe registered, and each visit should be recorded.
• Record actual figures — gas rate and combustion readings at service, not just "serviced OK". A dated record with numbers is what a warranty assessor accepts.
• A gap year is a problem. A missed service is the most common reason extended warranties get knocked back. If a customer comes to you with a two-year-old boiler and a blank service record, tell them now, not at claim time.

#What skipping Benchmark actually costs

• Warranty disputes. The manufacturer can refuse or reduce a claim, and the customer's next call is to whoever installed the boiler. Even when you eventually resolve it, you've spent unpaid hours arguing.
• Compliance evidence. Commissioning is part of Building Regulations compliance for a heating appliance. A completed Benchmark record is your evidence that it happened; without it you're relying on memory.
• Reputation. Home movers' solicitors and surveyors increasingly ask for boiler paperwork. "The installer never filled anything in" reflects on you long after the job.

Set against ten minutes at handover, there's no version of this trade-off that favours skipping it.

#How landlords and homeowners use it

For the customer, the completed Benchmark record is part of the property's paperwork:

• Warranty claims — it's the first document the manufacturer asks for
• Selling the house — conveyancing enquiries routinely request the boiler's commissioning and service records alongside the Building Regulations certificate
• Landlords — Benchmark sits alongside (not instead of) the annual landlord gas safety record; together they show the appliance was installed properly and maintained since

Leave the customer the completed record and tell them what it's for — it's a thirty-second conversation that positions the annual service as protecting their warranty rather than an optional extra. That's next year's service booking made at handover.

Guidance only — always follow the manufacturer's instructions, the Gas Safety (Installation and Use) Regulations and current standards. Installation, commissioning and servicing of gas appliances must be carried out by Gas Safe registered engineers.

#Do it faster with TradePlanr

TradePlanr puts the whole Benchmark workflow on your phone: complete the central heating commissioning checklist or the cylinder Benchmark record on site, pull your gas rate straight from the free gas rate calculator, capture signatures on screen and send the customer a PDF before you've packed the van. Every record stays stored against the job, so a warranty query three years on is a search, not a shoebox. Start on the free plan; the paid plan is a flat £9.99/month with no per-certificate fees.