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Has anyone heard of these Komfovent MVHR units? Does anyone have any experience of them? https://www.komfovent.com/en/business/rhp/ They have a Rotary Heat Exchanger, I've never heard of that before but they sound quite clever but is it really just one more thing to go wrong? Plus a little bit of cooling/heating. What does the collective wisdom think of these units?
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I've been asked by another self builder to have a look into why their heating bills are significantly higher than they expected. Part of the task will be checking the setting of their ASHP package (which is the same as mine). They also have the following MVHR unit https://www.systemair.com/xen/Villavent-UK/Products/residential-systems/rotary-units/side-connected/save/save-vsr-500-4f645bb8/ A quick look through the manual indicates it has an inbuilt electrical heater, which immediately raises the possibility of settings being in conflict with the main UFH heating from the ASHP, but also some strange defaults for an MVHR. I'll know more when I've been and gone through the settings next week. I've not come across a rotary heat exchange MVHR before. Has anyone any experience of these / this unit and any particular advice / knowledge gleaned from experience?