Underfloor heating

tubateacher

I am considering laying a new solid wood floor in my lounge (approx 20m2) and am thinking of putting down a wet underfloor heating system as well. A few questions.......
Does anyone have a rough idea of the cost of a system for a room this size?

The house is heated by a multifuel Rayburn, can you run a wet underfloor heating system from this?

Am thinking of laying a solid wooden floor from a reclaimers yard will the wood be too thick for the heating system to be effective?

I am only planning on installing the system downstairs and keeping radiators upstairs, again will this work?

Some of the questions may be a bit silly but I have no experience in this field so any help / advice would be much appreciated

Pincher

Real wood expand, contract, warp and crack.
You have to keep the flow temperature low to minimise the damage.
Ironically, the cheaper the material, the more immune to warping. The best compromise is probably engineered wooden floor boards.

If you are only doing one room, you can pretend the loop was just another radiator, but put in a thermostatic mixer valve (the right kind) to ensure low temperature. You can get away with not having a UFH pump, if you are lucky. The idea is that as the other rooms warm up, their radiators are shut off by their TRVs. Eventually, the only way to go is through the UFH loop and the towel radiator.

Kingspan and battens for 20m2 £400
Heat Spreader plate and flexible pipe for 20m2 £300
Thermostatic mixer valve £150
Plumbing bits to tap into radiator flow/return £50

So that's absolute minimum on materials.

If you go for manifold, UFH pump, digital room stat, electronic valves, I would budget another £1,200, just for materials.

If you were using coal or wood, a thermal store for a £1,000 is worth considering.