Electrics and gas
The sitting-room gas fire is also described as the back boiler. Can the survey confirm both appliances by looking at the case?
No. Looking at the case cannot confirm both the sitting-room gas fire and the back boiler. The survey can record a fire in the opening and the claim that a boiler sits behind it. It cannot see through the case, prove the flue, or show that both parts work. A back boiler, if there is one, is hidden behind the fire. Gas confirmation belongs with a Gas Safe engineer. Ask that engineer to identify what is actually installed before you treat two names as two appliances the survey has proved.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
A fire can be only a fire, or it can have a boiler behind it that heats water or radiators. The case shows the front, the opening and perhaps a pipe at the side. It does not show a heat exchanger, the flue connection, or whether a boiler part is still connected or long abandoned. A visual survey does not pull the appliance out. Using both names in the particulars does not turn a look at the front into two inspections.
Ask a Gas Safe engineer to say whether this is a back boiler, a fire alone, or a redundant shell, and to look at the flue. Do not lift the fire out on a viewing to settle it. If the seller's description says both, put that wording beside the survey so the solicitor can see a claim rather than a test. Until the engineer reports, the honest position is that the case was seen and the hidden boiler was not confirmed.
What should you ask your surveyor?
- What could you see: the fire case only, or pipes that suggested a unit behind?
- Any sign the fire was live, or was it cold and untested?
- Was a flue opening visible, or was it fully hidden behind the appliance?
What are the typical next steps?
- Do not treat a look at the case as confirmation of both appliances.
- Ask a Gas Safe engineer to identify the fire and any back boiler.
- Do not pull the fire out of the opening on a viewing.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
If the radiators were warm, has the survey confirmed the back boiler?
No. Warm radiators, even if noticed, are not the survey proving the hidden unit. The case was looked at. The boiler behind it was not inspected.
Can you tell from the front whether the gas to a back boiler is capped?
No. The survey cannot tell that from the case. Whether the supply is live, capped or redundant is for a Gas Safe engineer to confirm.