Recommendations for dMEVs preferably loft mounted

[Beau]

Hi all.

 

I'm just planning an en suit bathroom as part of our farmhouse renovation. I have considered trying to fit MVHR to the whole house but the house is so rambling I dont think I can ever do a proper job of ducting or airtightness so I come back to dMEVs. Reading reviews noise is often mentioned as a downside so I was hoping I could find a loft mounted unit that could go on the wall in the loft instead of a ceiling as I would presume this would be quieter. All I can find is standard ceiling/wall mounted units. Whatever we get we want decent quality that will last as we are fed up with failed extractor fans. 

 

Thanks

Beau

[JohnMo]

Simple question - Greenwood CV2 or CV3, which ever you can get at the best price. Nothing else.

15 minutes ago, Beau said:

Reading reviews noise is often mentioned as a downside so I was hoping I could find a loft mounted unit that could go on the wall in the loft instead of a ceiling as I would presume this would be quieter

They are silent, so much so I have to remove the cover to check it's working. The are smart also, in that they only boost if they need to. So just 3 wires needed. No manual boost required or light switch activation etc.

 

Do as simple install as possible - as said they make no noise, they use almost no power either.

 

Remember to undercut all doors to allow cross flow of air throughout house. No trickle vents in rooms that have dMEV fans. Ideally couple with self regulated trickle vents in dry rooms.

 

You should have a dMEV fan in every room that has a water, utility, bathroom and kitchen.

[Redbeard]

If the world is really quiet I can hear my 3 CV2s. If it isn't (and it usually isn't) I can't hear them. Even when I can it is not bothersome.

[Beau]

1 hour ago, JohnMo said:

Simple question - Greenwood CV2 or CV3, which ever you can get at the best price. Nothing else.

They are silent, so much so I have to remove the cover to check it's working. The are smart also, in that they only boost if they need to. So just 3 wires needed. No manual boost required or light switch activation etc.

 

Do as simple install as possible - as said they make no noise, they use almost no power either.

 

Remember to undercut all doors to allow cross flow of air throughout house. No trickle vents in rooms that have dMEV fans. Ideally couple with self regulated trickle vents in dry rooms.

 

You should have a dMEV fan in every room that has a water, utility, bathroom and kitchen.

Thanks John.

 

Some great info there. How long have you been using these units? 

[JohnMo]

Had one in the summer house, which my wife uses for massage etc. for about 18 months. I do have them set quite low and even then the humidity is never high

[Beau]

1 hour ago, JohnMo said:

Had one in the summer house, which my wife uses for massage etc. for about 18 months. I do have them set quite low and even then the humidity is never high

Been trying to work out the difference between them. Looks like the CV 3 is much the same as the CV 2.1 but with an app or have I missed something? 

[JohnMo]

I used CV2, super cheap on eBay. No app, do you need an app? Set and forget

[osprey]

On 28/01/2025 at 14:01, Beau said:

Been trying to work out the difference between them. Looks like the CV 3 is much the same as the CV 2.1 but with an app or have I missed something? 

Lower power consumption to meet regs.