GermGuardian - AC4100

I have one of these in each of my bedrooms. They are inexpensive, though kind of loud. They work great as a sound machine at night. Honestly, I'm not entirely sure of their overall effectiveness...or that of any air purifier. Sometimes I think they're just a sales pitch for money. I notice a much bigger difference in dust and odors when I stay on top of vacuuming and other cleaning. Since they have a physical on/off switch, I connected each to a Zigbee plug and integrated into Home Assistant. GermGuardian Air Purifier for Home with HEPA Filter, Removes 99.97% of Pollutants, Covers up to 375 Sq. Foot Room in 1 Hr, UV-C Light Helps Reduce Germs, Zero Ozone Verified, 11", Silver, AC4100CA https://a.co/d/gnGXI0n

Get a HEPA filter. You can actually get one for your central air system if you have one. But you can also find them very inexpensively  I got this one years ago https://a.co/d/0Zs3TI8 and have been pretty happy with it. I got it for dealing with wildfire smoke. Pretty much anything is good as long as it's HEPA. You can also get pretty far with DIY solutions that consist of sticking a fan onto a HEPA filter. 

GermGuardian is my favorite! Has a HEPA filter that is super easy to replace, UV-C, and odor control, and they also have some models with carbon filters, and is very quiet. I have one in my office and one at home and love them.

I have used ALEN and GermGuardian HEPA, I got the GG first and ALEN as a second one later. They definitely do something, I lived in city during first part of my pregnancy and the smells and air quality were stifling to me, so I bought one and it was a huge improvement as I could actually tolerate the air in my apartment without feeling sick. They filter noxious smells pretty well, I used to live with people who smoked 🍃and I was able to keep the smell out of my room with it, so it definitely did something. I always see Austin air and air doctor recommended, and some specifically for issues like mold. Idk if it’s hype, like someone said you could get a box fan and air filter and make your own. But, Air Doctor is doing a presale on their new model at half price so it’s around $400 instead of $800, but doesn’t come out until summer. I just bought it as i need one for other room and thought id see if it makes a significant difference compared to the ones i have.

For less than that I got two germ guardian hepa air filters, and a Bissell hepa vacuum.

Blues air or GermGuardian with UV. I’ve had mine for years and it’s been great