ᐅ Controlled residential ventilation & heat pumps: Viessmann vs. Vaillant vs. Zehnder?
Created on: 23 Nov 2022 14:12
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Nixwill2Hello everyone,
I want to revisit a topic that was mentioned a while ago in another thread but deserves a more detailed discussion, as it turns out to be more complicated than anticipated. Here’s our situation, and I would really appreciate hearing about your experiences. Starting with the background.
We are currently building a prefabricated house (timber construction) with a prefab home manufacturer. The plot is located in a small village, in a very old part of town. It seems like almost everyone heats with wood there. On our property, there is a wood smoke smell throughout the entire winter (we noticed this last year already, and it’s happening again this year), as if there is a campfire burning nearby non-stop.
Now, we are seriously concerned that with a mechanical ventilation system with heat recovery (MVHR), the indoor air could end up smelling the same as the outdoor air, which we definitely want to avoid. To counter this, we thought about installing a mechanical ventilation system with an activated carbon filter included. That’s why we have tentatively selected the Zehnder ComfoAir Q350 TR in the enthalpy version, since both of us already occasionally suffer from dry eyes. This system also comes from the factory with attachments for activated carbon filters.
Unfortunately, things turned out differently than expected. The house supplier is hesitant in initial discussions and is postponing the topic until the customization meeting in December. The reason given: they only work with Viessmann or Vaillant because the heat pumps come from those manufacturers. More precisely, it would be either the Viessmann Vitovent 300W or the Vaillant recoVair VAR360 ventilation system. Neither of these original systems offers a solution with an activated carbon filter.
Now to my main question. What’s your opinion on this? Our concern is not unfounded, and an F7 pollen filter doesn’t seem to be an adequate solution for this situation, does it? They immediately said that an F7 filter would be sufficient, but we don’t believe that.
Is it possible to install a Zehnder mechanical ventilation system alongside a heat pump from Viessmann or Vaillant, or not?
I don’t want to assume the worst-case scenario, but do you have any ideas on how to solve this problem if the house provider doesn’t allow any other mechanical ventilation system?
I would be very grateful for any ideas, experiences, or tips!
Best regards
Personally, I would probably also lean towards third-party solutions for the activated carbon filters, if they are even necessary. However, I can’t really say anything definitive due to a lack of practical experience...
Just a note regarding possible BAFA funding... if this might be relevant, don’t forget to consider that the heating system and the ventilation system need to be able to "communicate" with each other in order to qualify for funding as a package. At least that’s my outdated understanding 🙁
Just a note regarding possible BAFA funding... if this might be relevant, don’t forget to consider that the heating system and the ventilation system need to be able to "communicate" with each other in order to qualify for funding as a package. At least that’s my outdated understanding 🙁
Basically interesting, which is why I’m looking forward to a response, but it is irrelevant for us since we do not receive any subsidies.
However, why should the two be able to communicate with each other? I believe this is exactly the key issue with the Vaillant system, as I think I have read here in the forum...
However, why should the two be able to communicate with each other? I believe this is exactly the key issue with the Vaillant system, as I think I have read here in the forum...
Nixwill2 schrieb:
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Now I have to ask a really basic question: Is it really that simple?? Just put a box in between and that’s it? 🤨Yes, it really is that simple. It’s surprising how much companies charge as profit margins for something like this! 🙄 Whether it has to be exactly this one (I personally prefer metal casings that can be insulated). The same goes for controlled residential ventilation systems—anyone with some basic DIY skills can easily save a mid four-figure amount without sacrificing quality. But you should familiarize yourself with the process beforehand to understand what to expect and which “rules” need to be followed.