
Alen - BreatheSmart 35i
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Based on 1 year's data from Feb 24, 2026 How it works
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.
Alen 35i might be a solid choice for you. They are quiet
As a fellow teacher, I understand this so much. I was in the exact same boat with dust and outdated HVAC in my classroom. When I was shopping around, I actually reached out to parents for small donations to help cover the cost — most were super willing to chip in, especially since everyone’s so germ-conscious these days. I used [this Redditor’s air purifier database](https://www.reddit.com/user/mammoth_digger56/comments/1k1t9o8/air_purifier_brands_compared/) to compare specs. I ended up buying an Alen 35i… It’s not cheap, but it’s been a game changer. I actually bought a second one for my home after seeing how well it worked. Might be worth checking out if you’re looking for something that can really handle the space.
Just got a 35i for the bedroom and love how quiet it is. Strongly recommend.
the new coway 1512hhs wifi no ozone but noise wise i recommend alenair 35i level 2 or 3 is quiet and gets 125 cfm and is prolly quietest for the cadr - check housefresh review
Plus, they are literally BIFL, as they have a lifetime warranty. We have the same setup - Alen 75 in the main living space, but a 35 in our master bedroom suite.
Alen air purifiers are the best I’ve ever tried. Get the latest models that are WiFi enabled and automatically adjust to the current level of impurities in the air. And change your filters regularly. Expensive but worth it. Mage a world of difference for my pollen allergies and living in desert dust.
Longtime allergy sufferer. Alen air purifiers are the gold standard. Choose the BreatheSmart model that is one level ABOVE whatever your room's square footage is, and chose any filter designed for allergens or wildfire smoke. Keep the fan on the thermostat running (with or without A/C) and buy the best filter for your HVAC.
I bought the Alen BreatheSmart 9 years ago for $500 - a big investment. At the time I was desperate for allergy relief and it delivered. It's still going, no regerts.
Not smart but I have two Alens and absolutely love them. I've had an older Breathsmart for 6-7 years and still works great. Recently bought a smaller one for my gym/mancave and it's also great. Won't look for another brand if I needed another one.
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