Unfortunately filters and air purifiers will probably do very little.

I also have a gallon of bleach with my emergency supplies to purify water.Mike

I think a HEPA air purifier might be a better choice.http://www.epa.gov/indoor-air-quality-iaq/ozone-generators-are-sold-air-cleaners#generators-effective

But that's a $10k+ bill and I still don't KNOW if its going to solve the problem.I could really use some help here.I've had several professionals comes to the house and a lot of them say conflicting things, so its all been very confusing.I bought an air particle counter and that didn't show anything bad.I use a MERV 14 filter for my AC system intake and have a small HEPA air purifier in the house.Not a great experience with my first property, but I'm learning a hell of a lot.Thanks

Here is an interesting article on the topic from 2019.Speaking of water, there is also a pipeline large enough for a VW Bug to drive down connecting downtown Phoenix with the nuclear power plant out in Tonopah (on the other side of Buckeye) and they reuse the purified waste water to cool the reactors out there.

Regarding the other tenant, was there any air freshener/air purifier device (plus opening the windows), to alleviate the smoke odor until Smokey vacated?

Or is getting shellac on any wall at any time helping improve air quality in our unit, and if some smoke gets in while we wait to finish the ceilings, we can just run an air purifier or ozone machine to remove those odors from the unit after we finish the ceilings a few weeks later.

Plus water purifiers are included in my rehab price.

Consumers redirected their purchasing toward “the five pillars of the COVID lifestyle”: (1) working from home, (2) entertaining at home, (3) educating at home, (4) exercising at home, and (5) keeping a “healthy home” (keeping your homes clean and germ-free, which has in turn spurred sales of air purifiers and vacuum cleaners).

The complaining tenant wants to buy an air purifier that is supposed to take care of the smell and wants us to pay for half of it.