BreatheSmart 35i

I have two Alen Air i75s and i35s running in my house from 10 am to 10 pm. I used to run them 24 hours a day on high, but my electric bill was too high. The air in our house was always fresh and I found the woosh noise from the air scrubbers soothing.

I have the Alen 35 and even on turbo mode it is SO quiet which was incredibly important to me. It was really hard to find one that was quiet on the highest speed which the alien is. I’m not the easiest to please but am really happy with mine

Agree, have 75i and even on highest speed sound is minimal compared to a whole bunch of others I tried. And even on lower speeds of 3 and 4 still getting 255-300 cfm. I just bought the 45i because I wanted an additional unit in my living space that was smaller footprint. But running on high speed was way louder to me than turbo on the 75i and getting 350-375 cfm vs 255. Should be fine though for a smaller space where you can run on speed 3 vs turbo. In my case, as much as I love how small and lightweight it is, I'm returning. I just ordered 35i for the bedroom as it was a savings over 45i and used a coupon at home depot. Will see. I use the fresh filters.. Love the app, which I didn't think I would even care about. It shows me graphs of when outdoor and indoor levels spike... Co2 , pm2. 5, voc. And I like that I can change speeds and other setting from my phone if needed. I'm assuming the sensor not super accurate, but it shows trends in air quality.

Alen Breathesmarts have been in phenomenal for us. I bought the 45i for living room and a couple 35is for bedrooms. Power, quiet, and auto setting to turn up when particles are detected in the air. They make a huge difference.

I think alen air would suit you.. you have the budget for it.. specifically, alen breathsmart 35i - it’s expensive but quiet.. has good carbon for vocs should you need it.. lifetime warranty so it can grow with you.. much more cadr than you need for the room, so you dont have to run it on high.. again.. resulting in it even being more quiet.. Basically, you’re running a quiet unit on a non max setting so you still have room to spare for extra performance if you’re paranoid 🤣 And it seems you have money so the drawback of it being costly doesnt really matter..

And i think alen has a better scanner for particles that’s more accurate and lasts longer

I did a quick spec check sound wise for the 2 models in question - alen 35i is 42db at max and the airmega you mentioned is 53db at max I recall that db scale isnt linear and 10db means double the level of noise..