# Issue a Non-Domestic Gas Safety Record

Source: https://help.mucka.ai/gas-certs/issue-a-non-domestic-gas-safety-record
Category: Certificates
Last updated: 2026-08-27

> The gas safety inspection for commercial premises — a shop, a restaurant, an office or a plant room. A CP12 with the commercial supply block and no CO alarm columns.

The Non-Domestic Gas Safety Record is the gas safety inspection for a commercial installation — a shop, a restaurant, an office, a plant room. Same appliance grid as a CP12, same twelve months, same Gas Safe registration. What changes is the supply block and what the record does not ask.

It sits on the Gas tab in **New certificate**.

## When to use this one

- The annual gas safety inspection on commercial premises.
- Commercial heating plant: boilers, warm air units, water heaters in a plant room or boiler house.

If it is a home, use the **CP12**. If the job is commercial **catering** equipment — a kitchen range, a fryer, the extraction and the interlocks — use the **Commercial Catering Inspection Record** instead. That is the one that carries the ventilation interlock and air quality checks to IGEM/UP/19; this record does not, because the paper form does not.

## What it does not ask

Two things are missing on purpose, and both are missing from the paper record too:

- **No CO alarm columns.** The CP12 and the LPG record ask about audible CO alarms; a non-domestic record does not carry the block at all.
- **No remedial action column** in the defects band. There is one column for the defect and one for whether a label and warning notice were issued.

## Filling it in

Add each appliance the way you would on a CP12, and tap **Scan data badge** to read the make, model, serial and GC number off the rating plate. Multi-appliance is normal here — a plant room with two or three boilers is the usual shape, and the certificate still comes out on one page.

Three extra questions sit under each appliance:

- **Landlord's appliance** — is it the landlord's, or the tenant's own?
- **Appliance serviced** — separate from inspected. You can inspect an appliance without servicing it.
- **Visual condition of flue and termination** — the eyeball check, which is not the same as the flue performance test above it.

## The supply block

Five things:

- Emergency control accessible
- Gas tightness satisfactory
- Gas installation pipework visual inspection satisfactory
- Equipotential bonding
- **Gas inlet working pressure at the meter**

The meter pressure is in mbar with the unit locked, and it will not stop you approving the certificate if you leave it blank. Mucka will not tell you a pressure is wrong either — you record what you measured and you make the call. That is the rule across every certificate here: no cert turns a regulation threshold into an automatic pass or fail.

Underneath, **Number of appliances tested** counts itself off the grid above. There is nothing to type, and it cannot end up disagreeing with the list of appliances on the same page.

## What comes out

One landscape page: the appliance grid, the inspection grid with the three extra columns, the supply strip, anything you flagged as a defect, your comments and both signatures.

Printed under the title, on every copy, is the line the paper record carries:

> No detailed internal inspection of flues (integrity, construction and lining) has been carried out.

That is on there deliberately. It says what the inspection did not cover, and taking it off would make the certificate claim more than you checked.

The next inspection date fills itself in twelve months ahead and follows the inspection date until you change it yourself. That is what puts the premises into your renewal list, so Mucka starts chasing the re-inspection before it lapses.

## If an appliance fails

Same as a CP12. Mark it Immediately Dangerous, At Risk or Not to Current Standards and Mucka offers to draft the Gas Warning Notice for you, pre-filled with the unsafe appliances and the customer. You still review and approve it like any certificate — nothing goes out on its own.