ᐅ Are any modifications needed for interior doors due to a controlled residential ventilation system?
Created on: 22 Jan 2019 06:19
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Pädda
Hello. We are wondering whether the measures discussed in the forum regarding interior doors in connection with a mechanical ventilation system with heat recovery for air exchange are really necessary (e.g. cutting a gap at the bottom of the door, ventilated door frames, special transfer grilles, etc.). Air exchange must be ensured because of the Zehnder 350 mechanical ventilation system with heat recovery. Our general contractor said that some doors will remain open anyway, so all these measures are unnecessary. Of course, we would prefer the simplest and least complicated approach and just leave everything as it is. But then, does a mechanical ventilation system with heat recovery still offer any benefit?
ypg schrieb:
But yes, the gap is always mentioned. Air needs to circulate... However, I have never read anything about trimming off - the original post confuses me, and I can’t place it. I am just an amateur and have "trimming off" in mind. Maybe my imagination played a role. How is this actually done to make the gap at the bottom of the door larger? Trimming off doesn’t seem quite accurate...
Pädda schrieb:
I’m just an amateur and remember it as "cutting off." Maybe my imagination played a role. How is it actually done so that the gap at the bottom of the door becomes larger? Cutting off doesn’t seem entirely accurate...It is ordered accordingly.
The required size of corresponding transfer air openings naturally depends on the volume of air that needs to pass through the door. This is determined by the relevant calculations and cannot be answered with a general rule of thumb.
For example, with a volume of 40m³ (1,410 cubic feet) and a 90cm (35 inch) wide door, a gap of 1cm (0.4 inch) under the door is sufficient. For 80m³ (2,830 cubic feet), a 2cm (0.8 inch) gap is needed (source komfortlüftungPUNKTat). For the same volume, a gap of 2mm (0.08 inch) or 4mm (0.16 inch) between the door frame and the wall would also be adequate.
Personally, for aesthetic and soundproofing reasons, I would prefer to use the door frame as the transfer air opening.
For example, with a volume of 40m³ (1,410 cubic feet) and a 90cm (35 inch) wide door, a gap of 1cm (0.4 inch) under the door is sufficient. For 80m³ (2,830 cubic feet), a 2cm (0.8 inch) gap is needed (source komfortlüftungPUNKTat). For the same volume, a gap of 2mm (0.08 inch) or 4mm (0.16 inch) between the door frame and the wall would also be adequate.
Personally, for aesthetic and soundproofing reasons, I would prefer to use the door frame as the transfer air opening.
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Steffen8022 Jan 2019 13:26Dr Hix schrieb:
Personally, for aesthetic and soundproofing reasons, I would probably prefer the frame as the transfer opening.also very problematic in terms of soundproofing. We had that... and after 3 months we removed it again..
Steffen80 schrieb:
also very problematic in terms of soundproofing. We had them... we removed them again after 3 months..How large were they in your case?
I don’t notice any difference in soundproofing. They only become noticeable when cleaning, because a feather duster or wiping over them is not enough.
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