The Central Heating Commissioning Certificate is the handover record for a new central heating system. Use it when you commission a boiler, hot water and controls and want to evidence that the system was set up to the manufacturer's instructions and the Benchmark checklist, for the customer and for Building Control. It is the digital version of the Benchmark commissioning checklist in the boiler logbook.
When to use this one
- Commissioning a brand new boiler and heating system.
- Handing over a system after a heating upgrade or full system swap.
- Any job where the customer needs a Benchmark style commissioning record.
This is a commissioning record, not a safety inspection. If you are inspecting appliances for a landlord, use the CP12 instead. If you are servicing an existing appliance, the Boiler Service Record or Service & Maintenance Record fits better. They all live side by side, so pick whichever matches the job.
Start the record
You can start one two ways:
- From the job. Open the job from Jobs and use the Gas Certificates card. Starting it here links the client, the property and the engineer for you.
- From the Gas Certs page. Go to Gas Certs, tap New certificate, and pick Central Heating Commissioning Certificate.
Fill it in
Work down the form on site:
- Commissioning details. Set the commissioning date. The engineer's and the workspace's Gas Safe numbers are checked here, since every gas record carries them.
- Client and property. Link the client and the property the system serves.
- System type. Choose Open vented, Sealed or Combi. This decides which checks apply: a combi has no stored hot water cylinder, so that section is hidden; an open-vented system asks for the feed and expansion checks; a sealed system asks for the expansion vessel checks.
- Primary heat source. The new boiler: make, model, serial, GC number, flue type and heat input, plus the combustion reading. You can add the fuel type, ErP energy class and a condensing exemption number too.
- Hot water cylinder. Shown for an open-vented or sealed system. Record the make, model, type and the volumes. Hidden for a combi.
- Operating temperatures and settings. The flow and return temperatures, the expansion vessel charge, the cold-fill system pressure and the rest. Each reading has a locked unit so it can never be read as the wrong scale, and Mucka shows an advisory note if a reading looks outside the usual range. It never overrules you: every reading is your call.
- System conditioning (BS 7593). Record whether the system was flushed and the cleaner and inhibitor you used. This is free text in this version, no dosing calculator yet.
- Controls fitted and checked. Work through the controls list (room thermostat, programmer, zone valves, boiler interlock and so on).
- System operation checks. The common checks always show; the open-vented or sealed checks show only for that system type.
- Building control notification. Optional. Note the FENSA, Gas Safe or Building Control reference and the date you notified.
- Declaration. Record the overall result, add any comments, set the next service due date (Mucka suggests twelve months on) and sign on screen. The customer can sign for receipt too, but they do not have to.
Everything saves as you go, so you can put your phone down mid job and pick up where you left off, even on a different device.
Approve and send
Tap Approve when it is done. Mucka shows you the outcome and asks you to confirm. Approving locks the record as a legal document and generates the PDF. After that it cannot be edited, only corrected.
Then tap Send. Mucka pre-fills the recipient and attaches the PDF. Check the message, then send.
Need to fix an approved record?
You cannot edit a locked record, but you can create a correction. That copies it into a fresh draft with a new serial number; once you approve the correction, the original is marked superseded and its PDF carries a "superseded" watermark. The original is never deleted.
Ask Mucka
You can ask Mucka to get one started for you:
"Start a commissioning certificate for the new boiler at 88 Bradford Road."
Mucka opens the draft and links it up, but it never approves or sends a record on its own. Filling in the checks, approving and sending are always your call.