JamieG Posted October 6, 2023 Share Posted October 6, 2023 (edited) Hello, I have a spare Zehnder Comfoair Q450 Enthalpy Heat Exchanger as it doesn't work for our MVHR up in Scotland. Would anyone have a use for it? The only cost would be for delivery. It is in its original box from the Green Building Store. I am offering the Enthalpy heat exchanger only so you will need a Zehnder Comfoair Q450 to use this. Edited October 6, 2023 by Nickfromwales Link to comment Share on other sites More sharing options...
SteamyTea Posted October 6, 2023 Share Posted October 6, 2023 43 minutes ago, JamieG said: Zehnder Comfoair Q450 Enthalpy Heat Exchanger That is an expensive bit of kit you are giving away. Way too large for my house, by a factor of 5. Link to comment Share on other sites More sharing options...
JOE187 Posted October 6, 2023 Share Posted October 6, 2023 HI Jamie. Interested in the Zender unit will send you a PM Link to comment Share on other sites More sharing options...
JamieG Posted October 6, 2023 Author Share Posted October 6, 2023 Sorry my post might not have been clear. I am offering the Enthalpy heat exchanger only so you will need a Zehnder Comfoair Q450 to use this. If this is still of interest then let me know. Link to comment Share on other sites More sharing options...
ProDave Posted October 6, 2023 Share Posted October 6, 2023 I am more interested in why it is "not suitable for Scotland"? My Mitsubishi Enthalpy MVHR is working just fine. 1 Link to comment Share on other sites More sharing options...
flinn Posted October 29, 2023 Share Posted October 29, 2023 Hi Jamie I've just sent you a message. Thanks Link to comment Share on other sites More sharing options...
Grimaldi Posted March 16 Share Posted March 16 I am considering a Zehnder Q450 and was wondering whether to go for normal vs enthalpy exchanger. I am located in the Highlands of Scotland. My limited research shows that the decision is a trade-off between efficiency vs maintaining more optimal humidity in colder / dryer climates. Ideally I would go down the normal route given higher efficiency but wondering if anyone has issues with too low a level of interior humidity in colder parts of the UK. I can imagine real issues in places like Scandinavia where absolute humidity at temps of -20 may be super low, but wondering if a more typical Scottish winter temp of 0-5 degrees merits an enthalpy exchanger? Thanks Link to comment Share on other sites More sharing options...
Dan F Posted March 16 Share Posted March 16 1 hour ago, Grimaldi said: I am considering a Zehnder Q450 and was wondering whether to go for normal vs enthalpy exchanger. I am located in the Highlands of Scotland. My limited research shows that the decision is a trade-off between efficiency vs maintaining more optimal humidity in colder / dryer climates. Ideally I would go down the normal route given higher efficiency but wondering if anyone has issues with too low a level of interior humidity in colder parts of the UK. I can imagine real issues in places like Scandinavia where absolute humidity at temps of -20 may be super low, but wondering if a more typical Scottish winter temp of 0-5 degrees merits an enthalpy exchanger? Thanks If you have a PHPP model, this will actually estimate interior humidty with both options. This is what ours says for 305m2 TFA house in south-east with 4 occupants and Q600. We went for ERV based on this and no complaints. ERV: HRV: (If i plug-in Scottish Highlands, these numbes don't change.) Link to comment Share on other sites More sharing options...
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