ᐅ Safety switch for range hood with mechanical ventilation system
Created on: 7 Mar 2018 09:56
R
Roppo
Hello,
this year we are building a KFW 55 house and are currently planning the kitchen. We would like to install a range hood because we consider it the fundamentally better option, and there is basically nothing speaking against it. We do not have a chimney!
However, our company just informed us that in our case, a safety switch still needs to be installed because we have a controlled residential ventilation system. The exhaust hood causes such a high air exchange that the ventilation system cannot handle it and therefore must be deactivated during the operation of the exhaust hood.
The cost for this switch is, I believe, around 300 euros, but that is not the main issue.
What it sounded like to me, and this is also my question, is that with controlled residential ventilation, the recirculation mode might be the better option. Not because it is cheaper, but because it does not affect the functionality of the ventilation.
What do you know about this topic, and what would you do if you had the free choice—and why?
Best regards
this year we are building a KFW 55 house and are currently planning the kitchen. We would like to install a range hood because we consider it the fundamentally better option, and there is basically nothing speaking against it. We do not have a chimney!
However, our company just informed us that in our case, a safety switch still needs to be installed because we have a controlled residential ventilation system. The exhaust hood causes such a high air exchange that the ventilation system cannot handle it and therefore must be deactivated during the operation of the exhaust hood.
The cost for this switch is, I believe, around 300 euros, but that is not the main issue.
What it sounded like to me, and this is also my question, is that with controlled residential ventilation, the recirculation mode might be the better option. Not because it is cheaper, but because it does not affect the functionality of the ventilation.
What do you know about this topic, and what would you do if you had the free choice—and why?
Best regards
C
chand19869 May 2018 11:23matte1987 schrieb:
With a good recirculation hood, cooking odors are removed quickly through the controlled residential ventilation system. When we cook schnitzel at lunchtime, you can’t smell it anymore by late afternoon.That’s true. In fact, you pay significantly more for the same quality of odor removal with recirculation compared to exhaust ventilation. But yes, I know the Berbel system, I like it, and I consider it good. It just costs more.
The question is, what does the controlled residential ventilation system manufacturer say when the system is disrupted like this? Normally, the unit moves up to 350 cubic meters per hour (m³/h), or 450 m³/h for the larger device, into the house. Now there is an extractor hood that wants to pull out 1,000 m³/h. How do the fans in the controlled residential ventilation system handle that? I would clarify this beforehand to avoid losing the warranty right from day one.
The supply air fan runs too fast, while the exhaust fan is working against the extractor hood...
The supply air fan runs too fast, while the exhaust fan is working against the extractor hood...
S
Steffen809 May 2018 13:09Alex85 schrieb:
The question is, what does the mechanical ventilation with heat recovery (MVHR) system manufacturer say when you disrupt the system like this? Normally, the unit moves up to 350 m³/h (210 cfm), or 450 m³/h (265 cfm) for the larger model, into the house, and now there’s a range hood demanding 1000 m³/h (590 cfm) exhaust. How do the MVHR fans handle that? I would clarify this beforehand to avoid losing the warranty on day one.
The supply fan is overworking while the exhaust fan is pushing against the range hood’s airflow...This whole discussion is completely unnecessary... in practice, absolutely NOTHING happens! What about people who don’t have MVHR systems? Do they suddenly not manage to open their doors? That’s nonsense... the exhaust hood isn’t running for hours while cooking. You might use high power briefly when frying...
C
chand19869 May 2018 13:25Steffen80 schrieb:
Absolutely nothing! What do people do if they don’t have controlled mechanical ventilation?They get drafts through a single tilted window somewhere. Or a window sash opens slightly. Or there’s whistling under the front door. And so on. It’s not a complicated system, is it?
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