The invention relates to an air replacement system comprising at least one sensor unit (25) and a least one air-replacing device (1).

At this point, his doctor prescribes for him a change of air.

... decided that a change of scene would be welcome...

Bobrovsky said he felt he needed a change of scenery.

Fresh air and a change of environment can be equally useful.

The final airtightness result was just 0.8 air changes per hour.

to engage in interpretation, and especially in the absence of the

Doctors send patients into new climates for their health, because a change of “mental attitude” is necessary.

Doctors send patients into new climates for their health, because a change of “mental attitude” is necessary.

Doctors often advise their patients the air change because a change "of mental attitude" is necessary.

Doctors send patients into new climates for their health, because a change of "mental attitude" is necessary.

Doctors often advise their patients the air change because a change "of mental attitude" is necessary.

To people concerned about climate change, much of this sounds like good news.

To the sick the doctors wisely recommend a change of air and scenery.

I haven’t opened my eyes yet, but I feel the sun.