Electrics and gas
The only sign of underfloor heating is a manifold behind the bath panel. What can the survey honestly claim from that?
Only that a manifold was visible behind the bath panel. That is the honest claim. The survey can say this fitting was the sign of underfloor heating it could see. It cannot say the loops are intact, which rooms they heat, or that the system works. It has not opened the floors, measured temperatures, or run the pump as a test. A manifold is a distribution point, not a plan of the loops. If you need more, ask a heating engineer to inspect it with the panel off, and keep their note separate from the survey sentence.
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?
Underfloor heating is mostly hidden. The manifold is the part that can sit in a cupboard or behind a bath panel, with flow meters and valves on show. Seeing it supports the idea that loops exist somewhere. It does not map those loops, prove they are full, or show that the bathroom floor and the rooms beyond are all on the same circuit. A visual survey does not lift finished floors to trace pipes that were never in view.
Ask a heating engineer to inspect the manifold with access agreed, and to list what they could operate and what they could not see. Do not demand that the survey be rewritten as a whole-house heating test. If the seller says every room is on the system, put that claim in the solicitor's questions. The survey can stay limited to the fitting behind the bath panel, which is all it actually showed.
What should you ask your surveyor?
- Was the manifold fully visible behind the bath panel, or only glimpsed at one end?
- How many ports could you count, and did any look capped or disconnected?
- Did you see a pump, wiring or room controls, or only the manifold itself?
What are the typical next steps?
- Treat the survey as a record of the manifold that was visible.
- Ask a heating engineer if you need the loops and controls checked.
- Put any seller claim about which rooms are heated into the solicitor's questions.
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
Does a manifold prove every floor in the house is heated?
No. It only shows a manifold was seen behind the bath panel. It does not map the loops under the floors or name the rooms they serve.
Should you lift a floorboard on a viewing to find the pipes?
No. Do not lift floorboards on a viewing to chase the loops. Any further look needs the seller's agreement and a heating engineer.