ᐅ Central mechanical ventilation with heat recovery: supply and exhaust air, door undercut

Created on: 29 Apr 2017 16:22

Hello.

We are currently planning the supply and exhaust air outlets for the (concrete) ceilings.
So far, the layout is as follows:

Basement: Exhaust air in all rooms except the storage cellar (currently no supply or exhaust air)
Ground floor: Dining/living/kitchen area (one open space) with both supply and exhaust air, office with supply air, bathroom with exhaust air
Top floor: Bedrooms and children's rooms with supply air, bathroom with exhaust air

A door gap of 5-8mm (0.2–0.3 inches) has been recommended for the room doors to avoid issues with air transfer.

Questions:
Are your ventilation concepts similar? Any experiences?
Does supply air work effectively only through air transfer under the door (in the basement, air would have to pass through the stairwell)?
What are your thoughts on the door gap (5mm (0.2 inches) seems common to me)?

Thanks in advance.

Goldi0911130 Apr 2017 16:06

Isn't exhaust ventilation used in the bedroom to remove moist air?

Mycraft30 Apr 2017 20:33

No, usually fresh air supply is installed there to ensure there is fresh air inside, as it is needed at night... the used air is then extracted elsewhere.

Lumpi_LE30 Apr 2017 20:40

The question is unfortunately quite pointless, as it is clearly specified where intake and exhaust air should be placed, and the planner will implement this accordingly.
It's a bit like a survey asking where the reinforcement is located in the ceiling.

Goldi0911130 Apr 2017 21:42

#10

Thanks Mycraft, I actually thought it was the other way around.

@Lumpi, I can definitely do without comments like that, especially in a forum. So just ......

Lumpi_LE30 Apr 2017 21:59

#11

That was not directed at you but at the initial question and was meant seriously. There is no need to discuss something that is strictly regulated.

bluminger2 May 2017 20:56

#12

Of course, the planners will figure everything out in detail – but as a homeowner, you’re always interested in whether the approach really makes sense and what solutions others have found. That’s what a forum is for.

What I still find interesting in our case is that there is only exhaust air in the basement. Since we have an open staircase, it will probably work?

ᐅ Central mechanical ventilation with heat recovery: supply and exhaust air, door undercut

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