Coanda Posted December 13, 2023 Share Posted December 13, 2023 So far there has been no condensation in my DIY unit. However, I am in the design stage of DIY unit 1.1 which will be a much better insulated twin core model. Am I right in thinking, should any condensation form, it will be in the extract (from home) chamber and that is where I should put a drain? Just in case. Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted December 13, 2023 Share Posted December 13, 2023 Drain goes in the extract chamber, which has the fan to suck the air in and blow it outside, so on the cold side of the heat exchanger, usually bottom left in most units. 1 Link to comment Share on other sites More sharing options...
JohnMo Posted December 13, 2023 Share Posted December 13, 2023 34 minutes ago, Coanda said: Am I right in thinking, should any condensation form, it will be in the extract Depends did you get a standard or enthalpy heat exchanger. The enthalpy ones recycle the moisture back into the incoming air. So no condensation will accumulate. Link to comment Share on other sites More sharing options...
Savage87 Posted December 13, 2023 Share Posted December 13, 2023 I have a condensate trap (as a collar) on the extract pipe just above the mvhr and another hole at the bottom of the unit. Hope it helps.. 1 Link to comment Share on other sites More sharing options...
Coanda Posted March 1 Author Share Posted March 1 I'm wondering, does any air get sucked in through the condensate drain? Link to comment Share on other sites More sharing options...
Roundtuit Posted March 1 Share Posted March 1 They frequently discharge into the house waste plumbing, so should have a trap on it. Link to comment Share on other sites More sharing options...
Conor Posted March 1 Share Posted March 1 24 minutes ago, Coanda said: I'm wondering, does any air get sucked in through the condensate drain? the water in the trap is enough to stop the "sucking". Link to comment Share on other sites More sharing options...
JackofAll Posted March 7 Share Posted March 7 On 01/03/2024 at 11:23, Roundtuit said: They frequently discharge into the house waste plumbing, so should have a trap on it. Does the condensate pipe need to be 40mm?, was thinking of using overflow pipe and chasing it into the wall in order to get it to a drain in our utility. Don't want to be boxing in. Would over flow pipe work? Link to comment Share on other sites More sharing options...
Roundtuit Posted March 7 Share Posted March 7 Don't see why not, then drop it into a waterless trap in the utility. The condensate pipe out of my unit is overflow sized; it's only taking a trickle at worst. 1 Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted March 7 Share Posted March 7 Yes absolutely fine, my unit came with 20mm flexible pipe like you get on a dishwasher/washing machine, just drips out 1 Link to comment Share on other sites More sharing options...
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