Fitting UFH in stages/partially - and before switching from Oil to heat pump

[hanvyj]

We have a 70s property with cavity walls (cavity insulated) and suspended wood floors (uninsulated).

 

The kitchen is a mess so I'm planning on renovating that, as part of the renovation I'd like to insulate the suspended wooden floors, and add UFH (being able to remove the rad for counter space).

 

In the future, I'd like to insulate the rest of the floor, and I'm considering external wall insulation (depending on the cost). Until we insulate and add UFH, an ASHP wouldn't be a great fit, I don't think. By my calculations it would more expensive than the current oil boiler. But I'd certainly like to get an ASHP or even GSHP in the future.

 

I'd be doing all this DIY, so my plan was to slowly upgrade the ground floor to be insulated & maybe install UFH throughout while still using the oil boiler, then make the switch.

 

I've read that UFH doesn't play well with a boiler however. Would it be sufficient with Thermostatic Mixing Valves for each loop - or would I require a thermal storage tank? Would that then have to be removed if I ever installed a heat pump that naturally operated at lower temperatures?

Edited November 29, 2023 by hanvyj