I fancy wet UFH downstairs, but radiators upstairs. Im not sure how easy this is as they would run at different water temps. If i go with Solar thermal too it gets more complicated. Id probably use someone with expertise to design a system and work with someone local to install it. But if the instal cost is prohibitive I'll go standard gas combi with thermal store as i have now.
Tyke2 I relate to your adverse experience of ‘eco’ commercial buildings. I have enjoyed operating a number of Bream ‘very good’ designed by award chasing architects, then specified by value engineeers. Not a pleasant experience for the wallet!
I vowed that that my build would be ultra simple, however I have ended up with ufh, mvhr and passive inspired design.
The difference is that this time I am (vaguely) in control of the specifying and can directly equate to the benef