ᐅ Door gap Controlled mechanical ventilation Ventilation gap for air exchange

Hello everyone,

I understand that controlled residential ventilation systems require ventilation gaps for air exchange, which makes sense. We have two glass doors, and it is clear that maintaining the required gap height is not possible; the door will be as tall as possible.

We have a list with the specified dimensions outlining the requirements.

What are your thoughts on the assumption that a gap is present but does not always meet the required height? For some doors, a gap of 1.4 cm (0.55 inches) is required, which is quite a significant height.

PhoenixDH schrieb:
Hello everyone,

I understand that ventilation gaps must be present in a controlled residential ventilation system for air exchange, which makes sense. We have two glass doors, and it is clear that meeting the required gap height is not possible here; the doors are as tall as possible.

We have a list with the measurements specifying what is required.

What are your thoughts on the assumption that, yes, a gap is present, but it does not always meet the required height? Because for some doors, a 1.4cm (0.55 inches) gap is required, which is quite a substantial height.

I don’t understand what you are trying to say or ask us.

Well, what is the impact if these calculated dimensions are not consistently followed everywhere.

The air exchange probably won’t occur as planned.
Whether the air flows through faster there (which might cause drafts) or if the pressure equalization comes from other rooms likely depends on your specific situation.
However, I guess that a difference of one millimeter probably isn’t critical. But if you have only 0.4 cm (0.16 inches) of air space instead of 1.4 cm (0.55 inches), that’s a different matter.

How is it for those who also have a mechanical ventilation system with heat recovery?

Do you have the column down to the millimeter?

Good evening,

PhoenixDH schrieb:

Because for some doors 1.4cm (0.55 inches) would be required. That is already an immense height.

I usually tend to take homeowners' concerns seriously, but 1.4cm (0.55 inches) and "immense" height ...?

Regards, Bauexperte