AC4870

With that in mind a germ guardian tower is probably the most affordable good option. Whatever you buy should have UVC light built in to degrade mycotoxins, “plasmawave” or “bipolar ionizer” is also an acceptable alternative just make sure it’s California CARB certified. Stay away from classic ionizer/ozone

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

6 years in use without any problems. Germ guardian HEPA from Costco. There is a newer model for under $200. It is for up to 1900 square feet. We live in an area that is affected by wildfires every few years - this is what we bought it for. I now only run it when needed: smoke in environment, smoke from cooking, smells from cooking, if one family member is sick I put it in their room to prevent spread. Used it when my son got COVID - just left it running in his room. Nobody else got sick. It clears all odors and smoke very quickly, it has a PPM reading and you can watch it as it clears the air. It is very helpful in open plan kitchen/dining/living. It is nice to have odors cleared quickly. We have no pets and only one carpet, the filter still clears the air quickly, we have not change it. This may not be the case in homes with more dust production.

They don't really work if you have an active infestation. Ive got 4 lg ones in an 800sq ft house and I swear they do almost nothing. We even have this electrostatic filter in the hvac and still I've get systems when the doors close or the AC goes on. I have 2x airmega 200s, germ guardian rated for 900 sq ft, coway with uv rated for 600 sq ft. 2 upstairs and one down. If I were you id try to build the biggest Rosenthal filter or several as they don't get down hall ways or around stairs, etc. The think I don't like is they really tank your electric bill and are very noisy, as they have to stay on high mode.

I have 4 cats and one LR3. I found that whenever i start to smell pee it’s because someone has peed somewhere that’s not the box. I have found those 2 spots so I know right where to look. Before I realized this was happening one of the spots the pee got into the hard wood floor. Thankfully I was able to get the smell out with natures miracle. The other spot he would pee was right on the side of the litter box and close to the floor so it would just run under. After the floor scare I put a plastic mat under the box and the pee doesn’t absorb into anything and I think that makes a super noticeable smell. We have gotten the peeing under control thankfully. I’m always paranoid about the smell, like I just notice it clean or not. I put a purifier in the room with the box and I don’t even notice it anymore. I think the purifier is like a germ guardian or something. It works wonders.