Fascinating video. There was a comment on his video asking "Wouldn't this introduce the same amount of humidity/mold as opening a window?"
Curious if anybody has any more insight.
Curious if anybody has any more insight.
Moisture builds on the heat exchange surfaces of the heat exchanger, particulates, spores, etc. in the air deposit nutrients and viable life in the crud, it thrives and multiples right into the incoming airstream for your residence.
When the window is opened the air mixes without a surface for condensation and there's much less immediate deposition so there's not an enriched medium to sustain accelerated growth entirely in the air stream, but it still probably occurs to some extent in a more diffuse manner that produces a significantly lower ambient spore/toxin/particulate load