Comfoair Q450 - Enthalpy Heat Exchanger Free to a good home

[JamieG]

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

[SteamyTea]

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.

[JOE187]

 HI Jamie.

 Interested in the Zender unit will send you a PM

[JamieG]

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. 

 

 

[ProDave]

I am more interested in why it is "not suitable for Scotland"?

 

My Mitsubishi Enthalpy MVHR is working just fine.

[flinn]

Hi Jamie

 

I've just sent you a message.

 

Thanks

[Grimaldi]

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

[Dan F]

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.)