Nic Posted November 27 Share Posted November 27 Hi small house UFH downstairs 115m2 total space over two floors .fitting the Q250 for our MVHR . We will have an ashp for DHW and UFH . Solar to supplement electricity. the question is do I really need a ComfoPost? my understanding is it would need to be connected to the ASHP and it would need to be a reversible type pump? ( not chosen ASHP or cylinder yet, recommendations welcome) Link to comment Share on other sites More sharing options...
Nic Posted November 28 Author Share Posted November 28 Anyone got or wish they’d got a comfopost ? Link to comment Share on other sites More sharing options...
JohnMo Posted November 28 Share Posted November 28 Do a Google search for Buildhub and comfopost. Plenty of discussion about them over the last 6 months or more. 1 1 Link to comment Share on other sites More sharing options...
G and J Posted November 28 Share Posted November 28 I was really keen on having one, but the more I looked into it the less attractive it looked. MVHR simply doesn’t move enough air for it to help that much. Instead we are going to be gently cooling our screed downstairs and we are having a Fancoil mainly for cooling in the main bedroom and probably piping and cabling for a Fancoil in each of the other bedrooms. 1 Link to comment Share on other sites More sharing options...
Nic Posted November 28 Author Share Posted November 28 59 minutes ago, G and J said: I was really keen on having one, but the more I looked into it the less attractive it looked. MVHR simply doesn’t move enough air for it to help that much. Instead we are going to be gently cooling our screed downstairs and we are having a Fancoil mainly for cooling in the main bedroom and probably piping and cabling for a Fancoil in each of the other bedrooms. I take it you would link the FC to the ASHP? I’m not sure how they work to be honest Link to comment Share on other sites More sharing options...
JohnMo Posted November 28 Share Posted November 28 32 minutes ago, Nic said: I’m not sure how they work to be honest In simple terms the heat exchanger is just like you car radiator, so tubes with thin aluminium plates. A fan sucks or blows air from the room over the heat exchanger. Water is supplied which above (heating) or below (cooling) room temp and it heats/cools the air and the room. A variable speed fan results in variable capacity for a fixed flow temp of water. For a given output way smaller than a normal radiator. 1 Link to comment Share on other sites More sharing options...
G and J Posted November 28 Share Posted November 28 2 hours ago, Nic said: I take it you would link the FC to the ASHP? I’m not sure how they work to be honest I wasn’t either but a few hours reading on here and googling and I’m sold on the idea. We are building them in so they will be almost invisible (apart from a couple of grills). They connect to the flow and return of your wet UFH and they have a controller and, optionally a drain which I will be doing. The drain is for condensate if you run em cooler than the dew point, but we’re hoping we can run one zone UFH plus fancoils at a cool enough temperature to help cool the place but not enough to cause loads of condensation. So I think they’ll sit there with their guts at the same temp as the UFH and when more heat or cold is needed in that bedroom then the fan kicks in. That must mean a stat and controller just for them. 1 Link to comment Share on other sites More sharing options...
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