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Thank you very much for your thorough recommendation(s). As for the moisture problem, we waterproofed the basement last summer as water had been penetrating the basement wall. While that problem has been addressed, there is still efflorescence on the basement slab so we do run a dehumidifier down th

Hmm, but you didn't explain any of that in your main post ? As it sounds like smoke/VOCs are a bigger issue than your main post indicated. So firstly, I would look at the vents. As you are sharing air via vents in an apartment. (Mine is an older place with a smelly carpet...but no charges vents/no s