ᐅ Experience with centralized exhaust ventilation systems without heat recovery

Hello everyone,

Does anyone have experience with a central exhaust ventilation system without heat recovery in a new build, KfW 70 standard, with underfloor heating and no radiators? (This is important because you cannot place wall or window vents above radiators to immediately mix the cold air with warm air.)

Is it recommended? If yes, what should you pay attention to? Do you notice air drafts coming from wall or window vents during the cold seasons?

I am attaching a photo from the page I read about this. The system is explained there in more detail.

Thanks in advance

Why would anyone do such nonsense without a heat exchanger?

Install ventilation systems only with heat recovery.

This is the simplest type of ventilation system, preferred only for cost reasons. Not everyone has to drive a Mercedes.
The advantages of a controlled residential ventilation system are well known. What I am specifically interested in are experiences with such systems that are supposedly better than window ventilation.

This has nothing to do with Mercedes or anything like that, but why build according to energy saving regulations if you let cold air into the house through a hole and blow the warm air out?

tomtom79 schrieb:
This has nothing to do with Mercedes, etc., but why build according to the energy saving regulation if you bring cold air into the house through a hole and blow the warm air out.

As I said, for cost reasons.
This chart shows the differences in ventilation heat loss between three systems. (Guide to energy-efficient building and renovation)