Underfloor heating..

[VVega]

Go for UFH.

In addition to this very solid advice, just one more point. What surface is going on top of UFH? Tiles are most effective in my experience, wood works but with more loss, Lino is better than wood, carpet is the worst.

 

[Mudball]

Exceptional reply! Thank you.

I think we’re 90% certain we’ll go with UFH (which will be wet). Should be able to feed off our current boiler and direct some residual heat into the new utility on the way to the extension too (so I’m told).

the other added benefit of no rads is that you can put furniture and kitchen units or windows/doors whereever you like them. So we dropped our window height and built seating inside it.. Would not be able to it if we had a rad under the window. Also we could put couple of additional kitchen units where a rad would have gone. (so a big question for the Mrs, if she wants a bigger kitchen or a Rad)... should be an easy conversation.

 

[Mudball]

In addition to this very solid advice, just one more point. What surface is going on top of UFH? Tiles are most effective in my experience, wood works but with more loss, Lino is better than wood, carpet is the worst.

Good point ... we have wood looking LVT in the rest of the house with the suspended floor.. but for the lounge, we decided to go full porcelain tiles. So very good conductor and at the same time retains the heat.

 

[Aztecs27]

In addition to this very solid advice, just one more point. What surface is going on top of UFH? Tiles are most effective in my experience, wood works but with more loss, Lino is better than wood, carpet is the worst.

Will most certainly be tile. As much as my wallet would look at me disapprovingly (if it could)