50250S

I have a Honeywell 50250 from 7 years ago. They don't make them anymore and replacement filters are all aftermarket for them on Amazon. (Probably because they work so good) I've seen the units on ebay though. Amazing machine. Runs 24/7. I move it to the living room from my bedroom when I've cooked something in the kitchen that made a lot of smoke or is real potent like fish or onions. That thing takes care of it totally in about an hour. Smoke made it in the house from a house fire a block down. Took care of that in a day on high. With that model off the market new I've bought the replacement size unit for the living room. Honeywell HPA 300. Bought it 3 years ago. Only pulls in air from one side. Doesn't trap as much dust or get kitchen smells out well enough. The fan started making a squeaking noise this past spring. If you can find that 50250. I highly recommend it.

Yes. I have Honeywell HEPA units in multiple houses. 24/7.

Yes, an air purifier helps. The best brand is Honeywell with a HEPA filter. Second is Bionaire with True HEPA filter (purple one), third is Bionaire with the blue filter. Levoit kind of sucks. Don't waste your money on the Pure Enrichment Personal Air Purifier.

For reasonable VOC removal there are only 4 players I know in the market which offer products which have the minimum 10 pounds of sorbent media: Airpura, Allerair, Austin, IQAir. Wildfires product a huge mix of chemicals - from the vegetation, contents of burned buildings, etc. There is no consumer solution that removes all VOCs. Each type of media is better at some chemicals, not so good or not effective at all with others. For the same reason there is no sensor that I know that will give you the level of all VOCs. These machines and filters tend to be expensive. I just upgraded my Austin units with Immunity Machine filters which cost \~$700 each. We were spared wildfire smoke this season but with AQI numbers breaking 100 I was able to keep my indoor values close to 0. I use Austin and IQAir VOC machines along with Honeywell and Whirlpool HEPA units, 3 filters per room.

Honeywell HEPA. Don't buy an electrostatic/ionizer type "purifier" as it creates O³ (ozone) - which is hazardous (and is also a component of smog).

Honeywell HEPA air purifiers. I have two: one in bedroom and one in the room where I spend most of my time watching TV, etc. Makes a difference for me.

I have these, as well, and they’re great. The cheap after-market filters from Amazon work perfectly for them, too.