I could be wrong but I think you're meant to close the valves for summer. Might have a knock on effect if that is your "always on" bypass radiator.
But the boiler shouldn't be running the pump in summer so I'd not expect it to suck heat away!
(y) cheers chaps. I've had "damp" towels for my entire life. Can't wait for a functioning heaterClose the return valve
Edit: my bypass radiator is the WC downstairs - no TRVs at all.
reminds me when my late father asked my bro if he was SURE the oven was isolated. It wasn't. He also touched the electric fence around the pond not convinced it was working - surprising how much a bunch of D cells can hurt youTurn the power off before you start.
(y).No more ply boards they are a cement based subfloor, I've not used them though
Last edited: