We have just got our Zehnder Comfoair with Comfoclime commissioned, and the comfoclime is currently running in heating mode.

There’s quite a bit of noise coming from it, somewhat like a refrigerator but a fair bit louder so I think it’s the compressor but it seems a bit loud to me.

Wondering if the noise is normal? Or should we be contacting Zehnder about it.

Do you have an ASHP and UFH? Or are you using this entirely to provide space heating? The reason I ask is if this is running flat out then you must expect some operational 'noise'.

Yes to contacting the manufacturer, but they will likely point you directly to the system designer, and installer, to begin the process of elimination.

We’ll have ASHP+UFH installed end of the year, so the comfoclime is just to meant to take the edge off the heat during summer.

Yes I think we’ll likely talk to the designers and Zehnder but I also wanted to get some opinions from others in case they just say “this is normal”.

5 hours ago, WannabeBob said:

We’ll have ASHP+UFH installed end of the year, so the comfoclime is just to meant to take the edge off the heat during summer.

Yes I think we’ll likely talk to the designers and Zehnder but I also wanted to get some opinions from others in case they just say “this is normal”.

Turn it down to 50% duty and see if it runs quietly (quieter at least) so you have comprehensive feedback at hand to share with them.

I’d buy 2 Screwfix £15 fan heaters and use those until the UFH is working, just pop them on setting 1 (1 kW), and there’s a thermostatic control to manage overshoot.

We’ve got 2 on here atm (400m2 MBC PH TF), just plugged in on the GF and left on 24/7, and it’s nice and warm. TBH it gets too warm if we start intensive works but better than freezing the brass monkeys off!

10 hours ago, Nickfromwales said:

Turn it down to 50% duty and see if it runs quietly (quieter at least) so you have comprehensive feedback at hand to share with them.

I’d buy 2 Screwfix £15 fan heaters and use those until the UFH is working, just pop them on setting 1 (1 kW), and there’s a thermostatic control to manage overshoot.

We’ve got 2 on here atm (400m2 MBC PH TF), just plugged in on the GF and left on 24/7, and it’s nice and warm. TBH it gets too warm if we start intensive works but better than freezing the brass monkeys off!

We have one of the portable oil filled radiators and that keeps the house warm enough! Too warm even, like you said!

Yes turning it down a bit does reduce the noise, but I guess not having seen one in operation before we just don’t know if it’s an expected volume/sound.

To be honest we’re really just trying to test the comfoclime as it’s just been commissioned and seeing as we might need it in the summer (maybe not 100%?) testing it in heating mode seemed like a good proxy?