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
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xMisterDx25 Nov 2022 16:36Although it is fun to read and think about it, shouldn’t you rather check where the smell on your property is coming from and try to eliminate it?
The ventilation system will not completely replace airing out through the windows. Therefore, you will still let the smell into the house through open windows. And constantly replacing the activated carbon filters will also become costly.
Do you want to keep the windows closed all winter long?
The ventilation system will not completely replace airing out through the windows. Therefore, you will still let the smell into the house through open windows. And constantly replacing the activated carbon filters will also become costly.
Do you want to keep the windows closed all winter long?
xMisterDx schrieb:
The ventilation system will not completely replace airing out through the windows. But it works perfectly... all our windows are only opened twice a year for cleaning. The patio door is opened more often, but that’s not technically a window.
X
xMisterDx25 Nov 2022 17:37I like to keep the window open when it’s raining outside. But alright, if you think so.
I would still investigate the cause of the smell. Do you really want to live your whole life in a place that smells in winter?
I would still investigate the cause of the smell. Do you really want to live your whole life in a place that smells in winter?
What are you talking about @xMisterDx? With controlled mechanical ventilation, there is no odor, and especially when it’s raining, I keep the windows closed because I don’t want humidity inside the house.
I also only open the windows in exceptional cases. For example, when frying heavily on the cooktop or occasionally to clear fogged-up mirrors in the bathroom. But even then, very rarely, because it’s already properly ventilated.
Objectively, there is absolutely no need for us to ventilate manually through the windows.
I also only open the windows in exceptional cases. For example, when frying heavily on the cooktop or occasionally to clear fogged-up mirrors in the bathroom. But even then, very rarely, because it’s already properly ventilated.
Objectively, there is absolutely no need for us to ventilate manually through the windows.
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WilderSueden25 Nov 2022 22:12The problem has been known since #1; it is the neighbor’s chimney. In certain weather conditions, the smoke is pushed downwards, and if you are downwind, you get affected by it. If the neighbors do not maintain a good fire (damp wood, insufficient air supply when adding fuel), it causes even more smoke.
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