Hello everyone,
we are currently planning our solid-built house without insulation. However, we are unsure whether to install a central ventilation system. The general opinion, for example in forums, is that such a system should definitely be included in a new build. Reasons given are comfort, continuous air circulation, and so on—well known points. It is also understood that it may not be energy-efficient.
BUT: I have already spoken to one or two architects who say: definitely build without it. Their reason is that everything works fine initially, but after 5 to 6 years hygienic problems can occur despite maintenance. Based on their experience, most installed systems are eventually turned off and no longer used. Some doctors also confirm this and would not install such systems themselves. Their argument is: for prefabricated houses, yes, because necessary. For solid-built houses without insulation, no.
I am torn. On one hand, I want to stay up to date with what makes sense; on the other hand, I don’t want to install something that will be switched off after a few years anyway.
I am completely unsure now whether to choose it or not and hope to get some opinions from you!
Thank you very much in advance!
we are currently planning our solid-built house without insulation. However, we are unsure whether to install a central ventilation system. The general opinion, for example in forums, is that such a system should definitely be included in a new build. Reasons given are comfort, continuous air circulation, and so on—well known points. It is also understood that it may not be energy-efficient.
BUT: I have already spoken to one or two architects who say: definitely build without it. Their reason is that everything works fine initially, but after 5 to 6 years hygienic problems can occur despite maintenance. Based on their experience, most installed systems are eventually turned off and no longer used. Some doctors also confirm this and would not install such systems themselves. Their argument is: for prefabricated houses, yes, because necessary. For solid-built houses without insulation, no.
I am torn. On one hand, I want to stay up to date with what makes sense; on the other hand, I don’t want to install something that will be switched off after a few years anyway.
I am completely unsure now whether to choose it or not and hope to get some opinions from you!
Thank you very much in advance!
B
Bauexperte18 Feb 2015 11:16Hello Mycraft,
Regards, Bauexperte
Mycraft schrieb:Repeating this continuously does not make the core statement any more true; it remains "just" your personal opinion, which of course you are entitled to.
I have mentioned this several times here and in other forums... but here it is again:
Decentralized systems are more suitable for retrofitting during renovations, etc....
Regards, Bauexperte
B
Bauexperte18 Feb 2015 11:19Hello,
Best regards, Bauexperte
f-pNo schrieb:That is not correct. There are also decentralized systems where the builder can choose whether to include heat recovery or not. It is true, however, that heat recovery often plays a key role in achieving standards such as KfW 70.
Well – to my knowledge, decentralized ventilation systems only come with heat recovery...
Best regards, Bauexperte
Bauexperte schrieb:
Hello,
That is not correct. There are also decentralized systems where the homeowner can choose whether to use heat recovery or not. It is true, however, that heat recovery often plays a decisive role in meeting standards like KfW 70.
Best regards, BauexperteAh – okay.
Maybe the option I described with exhaust fans in the wet rooms along with trickle vents in the window frames for fresh air supply also counts as a ventilation system – I personally wouldn’t have considered that a ventilation system. To me, those would just be a few exhaust fans.
Or are there actually other systems (I don’t know everything, as from the start I only considered options with heat recovery)?
EveundGerd18 Feb 2015 11:39@f-pNo : Which system was installed in your case?
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Bauexperte18 Feb 2015 11:41Hello f-p,
Yes; for example, one is located in Berlin.
However, development does not stand still, so any recommendation for or against a system can only be a temporary suggestion.
Nowadays, we hardly offer the Berlin systems anymore, because from our perspective there is something better available from Wessling. I would describe this ventilation system as a hybrid system—even though it is also referred to as a decentralized system; it combines the advantages of both types. It is hardly more expensive and, among other benefits, can supply fresh air to around 75 sqm (approximately 800 sq ft) of living space with just one unit. The fact that it is the only system certified for installation in Passive Houses is just an added bonus.
As I mentioned at the beginning, development continues to move forward.
Regards, Bauexperte
f-pNo schrieb:
Or are there really other systems (I don’t know all of them, since from the start I was only interested in those with heat recovery)?
Yes; for example, one is located in Berlin.
However, development does not stand still, so any recommendation for or against a system can only be a temporary suggestion.
Nowadays, we hardly offer the Berlin systems anymore, because from our perspective there is something better available from Wessling. I would describe this ventilation system as a hybrid system—even though it is also referred to as a decentralized system; it combines the advantages of both types. It is hardly more expensive and, among other benefits, can supply fresh air to around 75 sqm (approximately 800 sq ft) of living space with just one unit. The fact that it is the only system certified for installation in Passive Houses is just an added bonus.
As I mentioned at the beginning, development continues to move forward.
Regards, Bauexperte
Yes, there are different systems, although I do not consider a simple exhaust system with window frame vents to be proper ventilation systems...
1. Simple exhaust system:
2. Decentralized ventilation system without heat recovery
3. Decentralized system with heat recovery
1. Central ventilation system with heat recovery (simply imagine the heat exchanger removed for a system without heat recovery)
1. Simple exhaust system:
2. Decentralized ventilation system without heat recovery
3. Decentralized system with heat recovery
1. Central ventilation system with heat recovery (simply imagine the heat exchanger removed for a system without heat recovery)
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