ᐅ Mechanical ventilation with heat recovery using enthalpy or rotary heat exchangers
Created on: 5 Apr 2020 21:15
T
Taube05
Hello everyone,
we are currently planning our new build. The house will have approximately 175 square meters (1880 square feet) of living space.
At the moment, we are researching ventilation systems. We want a central ventilation system with heat recovery and would like to ask if you can recommend any manufacturers or models.
It is important for us to have an efficient ventilation system with quiet operation as well as low maintenance costs (filter changes).
Furthermore, we are interested in whether you generally recommend a central ventilation system with an enthalpy exchanger or with a rotary heat exchanger. Both have their advantages and disadvantages.
Thank you very much for your help.
Good luck
we are currently planning our new build. The house will have approximately 175 square meters (1880 square feet) of living space.
At the moment, we are researching ventilation systems. We want a central ventilation system with heat recovery and would like to ask if you can recommend any manufacturers or models.
It is important for us to have an efficient ventilation system with quiet operation as well as low maintenance costs (filter changes).
Furthermore, we are interested in whether you generally recommend a central ventilation system with an enthalpy exchanger or with a rotary heat exchanger. Both have their advantages and disadvantages.
Thank you very much for your help.
Good luck
H
hampshire26 Nov 2021 16:17spochtsfreund schrieb:
The humidity level before was about 32 - 35% and now it's 39 - 42%. Nixwill schrieb:
May I ask if you can noticeably feel the (rather small) difference in humidity? If you focus not on the absolute values but on the improvement, the change of +20% is not that small. For many, it could mean the difference between “too dry mucous membranes” and “rather unproblematic.” Of course, everyone reacts differently.
Stop, stop – this has nothing to do with saving money (after all, this is about indoor climate, and I’d gladly give up a few Hue lamps for that). Not nice!
If you google this device, one of the first things you’ll find is a forum post about Zehnder exchangers and related issues with odors and air distribution throughout all rooms. At first, I thought, fine, I’ll just disable the humidity control, but that was quickly dismissed once I understood that the entire filter system is different and not just a (cost-effective replaceable filter).
That’s why I have concerns and further questions on this topic. I definitely don’t want to buy the wrong thing only to regret it later, and if strange odors ruin the house for me, I’ll skip it and instead use humidifiers as needed… Simple as that.
The only positive thing in your last post was about the youth – that almost cheers up an old guy who likes to treat himself to some luxury with his hard-earned money, of course always 😉
If you google this device, one of the first things you’ll find is a forum post about Zehnder exchangers and related issues with odors and air distribution throughout all rooms. At first, I thought, fine, I’ll just disable the humidity control, but that was quickly dismissed once I understood that the entire filter system is different and not just a (cost-effective replaceable filter).
That’s why I have concerns and further questions on this topic. I definitely don’t want to buy the wrong thing only to regret it later, and if strange odors ruin the house for me, I’ll skip it and instead use humidifiers as needed… Simple as that.
The only positive thing in your last post was about the youth – that almost cheers up an old guy who likes to treat himself to some luxury with his hard-earned money, of course always 😉
Hey, that was meant sarcastically. I would never seriously accuse you of being stingy :p
We installed an activated carbon filter before the supply air distributor (this is very easy to do with Zehnder’s Comfowell boxes). Not because of internal odor transfer, but to improve the outdoor air quality (which is currently affected by the stove and chimney season). It works great and might even filter out any internal odors (which I don’t really believe exist). So, no worries.
We installed an activated carbon filter before the supply air distributor (this is very easy to do with Zehnder’s Comfowell boxes). Not because of internal odor transfer, but to improve the outdoor air quality (which is currently affected by the stove and chimney season). It works great and might even filter out any internal odors (which I don’t really believe exist). So, no worries.
This is how it looks: with the flood of chimney owners in our neighborhood, it was problematic without activated carbon, but perfect with it! Installed in the same position as @Hangman.
The enthalpy exchanger and the sensible heat exchanger made no difference.
Internal odor distribution with Zehnder also showed no issues with either the enthalpy or sensible heat exchanger.
We experienced both versions, as the sensible heat exchanger was initially installed by mistake and left running until the first heating season. Then, as the outside temperatures dropped, the indoor humidity levels plummeted. Since then, the system has been operating with the enthalpy exchanger to our complete satisfaction for the second year.
The enthalpy exchanger and the sensible heat exchanger made no difference.
Internal odor distribution with Zehnder also showed no issues with either the enthalpy or sensible heat exchanger.
We experienced both versions, as the sensible heat exchanger was initially installed by mistake and left running until the first heating season. Then, as the outside temperatures dropped, the indoor humidity levels plummeted. Since then, the system has been operating with the enthalpy exchanger to our complete satisfaction for the second year.
Hangman schrieb:
Hey, that was meant ironically. I would never seriously accuse you of being frugal :p
We have an activated carbon filter installed before the supply air distribution (this is very easy with Zehnder using their Comfowell boxes). Not because of internal odor transfer, but because of the fresh countryside air (which right now is replaced by the stove and fireplace season). It works great and might also filter out internal odors (though I don’t really believe in those). So no need to worry.All good, glad we cleared that up 😉.
Your points about this additional activated carbon filter sound really interesting (all the things you have to consider, wow)! Is this a specific Zehnder solution or is there a general option that can also be implemented in new builds, for example with Viessmann? Both fresh countryside air and fireplaces could definitely be relevant for us...
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