Airmega 300 (model 300)

Yeah, your boyfriend is totally wrong. KNKA appears to be a junk rebadged brand. These are typically very cheap with poor build quality, short-lived replacement filter availability, and lousy customer service. The 2,325 sq. ft. coverage rating is highly misleading. This is likely at 1 Air Change per Hour (ACH) which is far too low. You want a minimum of 4.8 - 5 ACH for relatively normal particulate pollution levels. Biggest red flag: no Clean Air Delivery Rates (CADRs) listed. Coway is a high quality consumer-grade brand. The [Airmega 300](https://cowaymega.com/products/airmega-300?variant=34493568647327) has a 5 year warranty, is energy efficient, and relatively quiet. Top Smoke CADR is 285 CFM. This means the largest room size it can handle is 427 sq. ft. with an 8 ft. ceiling. You can use the discount code **COWAYMEGA10** on Coway's website for an additional 10% off, which brings the price down to $398.70. Unfortunately neither of these will combat the chemical odors from lawn care treatments. Odors are gases or vapors which require many pounds of sorbent media. Sorbent media are activated carbon, activated alumina, or synthetic zeolites. Neither the KNKA nor the Coway have very much activated carbon; they are designed to capture particulates (such as airborne mold spores). Heavyweight sorbent media purifiers are very expensive, very loud, and clean the air more slowly than particulates-focused purifiers. An entry-level unit from a brand like AllerAir would be at least $600. And depending on the exact gaseous "species" you're smelling, you may need chemically modified sorbents to enhance removal capacities.

No, Dyson is one of the worst! The HP09 has terrible Clean Air Delivery Rates (CADRs). They just know how to market effectively. As **Rule 4** and the AutoModerator comment repeats, it's helpful to know the ceiling height. I'll assume it's 2.4 meters. 60 m^(2) x 2.4 = 144 m^(3). For rooms measured in meters, CADR should be at least 3 times a room's volume (in m^(3)). So the minimum CADR should be 432 m^(3)/h. If you have [allergies, health conditions, high pollution, etc.](https://www.reddit.com/r/AirPurifiers/wiki/index/how_to_choose_an_air_purifier_for_particulates/#wiki_when_higher_than_normal_cadrs_may_be_needed), multiply the room's volume by 4-6. So CADRs of 576 - 864 m^(3)/h. Coway is a high quality brand that's relatively quiet. I don't know exactly where you are, so I don't know what's available to you. But the [Coway Airmega 400](https://www.amazon.co.uk/purifier-restaurant-certified-HyperCaptive-filtration/dp/B099S9Y285) would be a very good fit (Amazon UK website linked). If you can't find that, the Coway Airmega 300 might suffice... although you may want to supplement it with a smaller Coway model like the Coway Airmega Jet.

coway. coway hands down. with two cockatiels i keep one thats supposed to cover 2500 sqft in a tiny bedroom because well…. it requires it, but we want a second one for the rest of the house. they do purifying and have charcoal filters for odors which has been great for cooking etc in the past

I have a CR box with 6 PC fans. The throughput is just not enough to deal with the fire smoke.. ended up turning my actual purifier’s fan speed up. I have the Coway 300. Speed 3(200CFM) worst day 2 of them running.

Get the Coway Airmega 240. Its on sale and should be around the 1512 price and it's more powerful. You want to oversize it so you don't have to run at max speed. If you got the space and money the Airmega 300 is a nice unit also. Blue air is garbage!

I have two of those for bedrooms and the bigger airmega 300 for kitchen/dining/living area. They've been working great for me (I get impacted by wildfires and my neighbors fireplaces).

Get whatever coway is on sale, I like the 240/250/300/400

Hey, you and I are in the same boat. I had a baby boy at 31 weeks, now almost 5 month adjusted, and I went down the air quality rabbit hole hard. I want to do whatever I can to keep him healthy and developing normally. He sleeps with us in our room right now. I have a clean air kits luggable xl pc fan cr box and a IQair Health Pro Plus running on setting 2. Both run 24/7. This gives me a lot of air changes per hour and some gas filtration, while staying below 50 decibels. In the rest of the house, I have more luggable xls, smart air blast, iqair gc and GCX, Coway 400 and 300, and an Alen 25i. I think it’s important to get a standalone air quality monitor like the air gradient one or purple air zen. I run the hvac blower fan 24/7 to circulate air through the house. I also open windows every morning and bring in fresh air to keep CO2 low. I don’t know what your budget is, but you can make your own cr boxes for really cheap and then throw a few nice hepa air purifiers on top. I bought all the expensive units used (iqair, Coway, smart air) and saved a ton of money. Just gave them a good cleaning and new filters. Another important thing is to always run your kitchen hood vent when cooking I’ve been keeping my house between 68-72 degrees Fahrenheit so that he sleeps his best and relative humidity between 45-55%. I have a Midea Cube dehumidifier I run when it’s really humid out and humidity in the house gets above 60%. I also vaccum and mop the floors all the time now. We have an old dog that sheds a lot and the floors get covered in hair if I don’t stay on top of it. I kindof rambled but that’s just been what I have been doing and what purifiers I bought to give you some ideas and things to look into.

I just got an Alen Air 25i for my little office and it’s been a really great unit for the last few weeks. Alen sells bundle “whole house” solutions that might work for you. For me, I put a smart air blast in my living room, a iqair GCX in my kitchen, iqair gc in my dining room/front foyer, Alen 25i in the office, Coway Air Mega 300 and 400s in our spare bedrooms, an iq air health pro plus in the master bedroom, and 4 clean air luggable cr boxes spread out throughout the house. Do I have an addiction to buying air purifiers? Yes. Very weird addiction. But all were bought off Facebook marketplace and were pennies on the dollar compared to new. Just had to give them a good wipe down and put in a new filter.