5 ms·
A lot of them do not vent at all. They just draw it up through a coarse filter and out the top again.
by stefan_ 4y ago
A lot of them do not vent at all. They just draw it up through a coarse filter and out the top again.
- rascul 4y agoYes, I see those too. I work on houses for a living though and those are not too common, at least around here. I typically might see those in the older houses, or in half assed renovations.