I’ve recently removed a radiator in quite a small stair room where the stairs to the tow attic bedrooms are.
I was thinking of, instead of reinstalling the radiator, installing a concealed hydronic fan coil in the attic eaves above.
The main reasons for this are to free up wall space in a small room, allow for a higher heat output than the old rad possibly allowing lower flow temps, help mix the warmer air in the attic landing and cooler air in the stair room below and provide the possibility of cooling in the summer.
We have well insulated and improved the airtightness of the attic and added external blinds to the Velux windows. This has made a huge difference to the overheating problem in the attic but when there are lots of hot days in a row it becomes a losing battle. This is why it would be good to have the option of cooling when this happens.
As it will be used for cooling I want to have a separate pipe run back to the cellar where our 3 port valve and cylinder are. This will allow another valve to stop flow through radiators when cooling and this pipe run will need to be well and continuously insulated to allow low flow temps in cooling mode without condensation.
However the pipes will have to be run through quite a few joists. Does anyone know of what I can use to make this as easy as possible to install? I think I have a route where I can lift floorboards to access.
Are there any pre-insulated pipes that could be used?
Has anyone else done this before?