Where do you get your 60% humidity ceiling from? I live in Singapore these days, we currently have 80% humidity (and that's fairly normal). We have much less problems with mold here than in Britain or Germany.
(In Germany, problems with mold were usually in winter, anyway.)
Yes, bathrooms with neither windows nor fans are annoying.
> Sure, but the goal is to do that in a controlled manner. Every outlet needs an inlet, and that inlet can either be a dedicated one with a filter (via ERV) or cracks, crevices, and air leaks around your house that you can't see. By puling in uncontrolled outside air you risk moisture buildup in those areas that can lead to mold and rot.
Eh, the air will mostly be pulled in either through another open window (good), or through the same window you are blasting the hot air out of (slightly less good), because your fan doesn't form a seal.
I don't really see how you are getting your moisture build-up. You only really get condensation on the walls, when your walls are colder than the air.
> Unless your interior air is humid, because the house lacks even the most basic form of humidity control. Then those air leak spots cool the area they're leaking in around which then makes condensation from your interior humidity.
I never heard of anyone having that problem in summer, and never had it myself.
I have no clue where you are taking your worries from.
(In Germany, problems with mold were usually in winter, anyway.)
Yes, bathrooms with neither windows nor fans are annoying.
> Sure, but the goal is to do that in a controlled manner. Every outlet needs an inlet, and that inlet can either be a dedicated one with a filter (via ERV) or cracks, crevices, and air leaks around your house that you can't see. By puling in uncontrolled outside air you risk moisture buildup in those areas that can lead to mold and rot.
Eh, the air will mostly be pulled in either through another open window (good), or through the same window you are blasting the hot air out of (slightly less good), because your fan doesn't form a seal.
I don't really see how you are getting your moisture build-up. You only really get condensation on the walls, when your walls are colder than the air.
> Unless your interior air is humid, because the house lacks even the most basic form of humidity control. Then those air leak spots cool the area they're leaking in around which then makes condensation from your interior humidity.
I never heard of anyone having that problem in summer, and never had it myself.
I have no clue where you are taking your worries from.