Heating options?

[DisastersAbound]

We're fixing up a 3 bedroom detached house from bare walls and floors and the heating is an ancient tank system and all the radiators need replacing so I'm wondering if there's anything better or that we should consider over a combi boiler and new radiators?

It has atm bare/unfinished floorboards and we'll stick with some sort of hard/wood floors, not carpet.

The back room of the house is single story with a bay and French doors, north-west facing. There's some small window on the south west-side but they just in the side access so not much light. We're kinda used to the sun heating the flat we live in currently as well as shared heat from neighbouring flats.

We'll need pretty constant heat though the day as we're home a lot and the DC have sensory issues so can't just dress warmer

Underfloor wet heating is lovely if that's an option? Not sure it works under carpet (may be wrong) but tiles and wood are fine.
Saves space on the walls as well.

@TheOneWithUnagi wood and tiles is fine, need to work out the cost of installing and running. I was loong at MN post and some people said it wasn't very expensive to run and others were saying it was really expensive 😬

What's your insulation like? I think UFH works best in well-insulated houses. It works differently to radiators in that you don't get a blast of heat, but it maintains a comfortable temperature consistently.

I think wet UFH shouldn't be expensive to run. It's the electric stuff you want to avoid.

It was already installed in our house so I can't give an answer of whether the bills went up.
It's over a larger area but runs at a lower temperature than normal rads.

But as PP said maybe people saying it is very expensive are talking about electric UFH, as that will be.

@Flockameanie there's insulation in the loft but some/all needs replacing thanks to a leak. No clue what's in the extension/flat roof at the back. The smaller windows and al of upstairs are UPVC double glazed but the bay is wood and maybe double glazed but the doors are probably not draft proof (not sure if they're staying yet). Apparently there's cavity wall insulation. Nothing under the floor I think.

Yes electric heating seems like it would be insanely expensive

I wonder how/if it would work upstairs too?

Heated wall paper. It's expensive but there's no need for pipes or radiators. Doesn't take up any space either.