Atem X

The green color is for marketing.I thought the same thing.The green hepa is used on several of their machines. On sale you could buy 3 off the Coway Airmega 450's.The Coway 350 lacks the laser sensor,wheels on the bottom,and less airflow. I bought the 450 for less than $350 and the 350 for $239. If odor control is not an issue buy a couple IQAIR Atem X and skip the Atem Earth.

I have several IQAIR Healthpro purifiers.4 of the compact model and 2 of the model with the carbon filters. I also have an Austin Air and 2 Coway Airmega 400's. Recently I bought the 350 and the 450. The IQAIR purifiers are the best quality wise and offer the better filters which filter down to.003. The Coway machine aren't sealed machines but are still ok. You need to see the IQAIR Healthpro in person to make sure they will look ok with your furniture design. I don't mind the cleanroom look. I got the Coway Airmega 450 for about $350 on sale and it moves alot of air but is noisy on the turbo mode. I think you should try them out off Amazon and return the ones that don't work in your home.

I love IQ Air purifiers. I have three now: a Health Pro, which I got some twenty years ago and which put an end within minutes to what in retrospect I understand to have been my first attack of severe asthma; an Atem X I got for my office just a few years ago, hoping it would prevent me from inhaling both Covid viruses and asbestos from a badly-managed asbestos removal happening on the floor above mine; and the little Atem Car, which hasn't made much difference to how I breathe in my car. I have also used a Blue Air purifier, good not as good as the IQ Airs but considerably less expensive. Dupixent has probably made the most difference in controlling my asthma, but for me these machines have also been essential.

Search high CADR purifiers. My recommendation is if you are ok spending the money on an iqair unit, to look at other options since you have multiple rooms. What I see right now is the levoit EverestAir on clearance for $299 from Bestbuy. It is an excellent choice with a high 350 CFM CADR. (I just got 2 more at this price) a “comparable” unit is the levoit core 600s-p(sale price 299 410cfm CADR) if the Everest is not on clearance. I would buy the core at the sale price. Owning both the Everest is better in my opinion. As others have stated multiple units will provide more benefit than one large unit. However again if you are spending that money and like iqair please consider the Atem-X as it has a very high CADR. Another option is the SmartAir blast MKII. This is a beast of a unit that targets commercial applications but is generally at the same price point as the larger IQAir units but proving a much higher CADR. I have one sitting in my 600sqft Great room.

I have heard good things from the Smart Blast, and on paper the performance is impressive. If you want to stick with IQ Air, the IQ Air Atem X is a tried and true beast if you are looking for filtration without carbon. My unit has a certified measured particle removal rate of 706 m3/h or 415.5 CFM and comes with a built-in indoor AQI monitor. I'm very happy with my unit.

Are you looking to move one purifier between your bedroom and living room? I would *not* recommend Airpura or AllerAir unless you have a serious gas/vapor/odor/VOCs issue that can't be mitigated with source control or ventilation. In that case, you'd choose one of their heavyweight carbon purifiers. Airpura and AllerAir do make more particulates-focused units, but they don't list particulate Clean Air Delivery Rates (CADRs). They're also known for be very loud. Both are Canadian companies that manufacture largely in Canada and some components in the USA. Levoit is lower quality than IQAir and Coway. The [IQAir Atem X](https://www.iqair.com/us/products/air-purifiers/atem-x) you linked in a comment is high quality and has CADRs in the 400s CFM, but it's very expensive per CADR. As for "True" HEPA, I would say that listing the standard and filtration efficiency at Most Penetrating Particle Size (MPPS) gives you the best idea of performance. There are several HEPA standards. But I don't think there's a significant difference between brands on this front; they will still clean your air. The [Coway Airmega AP-1512HH Mighty](https://cowaymega.com/products/mighty-ap-1512hh) you linked is commonly recommended. It's a good price point and attainable for many. But the Mighty has a few drawbacks like being less energy efficient, somewhat loud, and occasionally people have reported balance issues (e.g., purifier "walking" across a floor). The [Coway Airmega 400](https://cowaymega.com/products/airmega-400) was probably recommended in part because it's "oversized" for your bedroom. Oversizing allows you to run the unit on a quieter setting while hopefully maintaining CADRs. ➡️ If you're expecting one purifier to clean both the living room and bedroom areas, I would also recommend the Coway Airmega 400. The highly upgraded pick would be the [Coway Airmega ProX](https://cowaymega.com/products/airmega-prox). Top Smoke CADR is 568 CFM. It has wheels so you can move it around easily and it shows PM10, PM2.5, and PM1.0 concentrations. Obviously the ProX is fairly big. Keep in mind that CADRs apply to the highest airflow speed/setting *only*. Lower settings have lower CADRs, which reduces cleaning effectiveness. Right now there aren't any fantastic sales directly from Coway. But you can use the discount codes **COWAYMEGA10** or **FORYOU10** for 10% off most items.

I would avoid the Dyson Big+Quiet models. I don't think the particulate air cleaning nor the build quality matches the price tag. Per **Rule 4: Information For Air Purifier Requests** and repeated in the AutoModerator comment, purifiers are sized by room volume. Let's assume your ceilings are 2.4 meters high. 50 m^(2) × 2.4 m = 120 m^(3). For rooms measured in meters, minimum Clean Air Delivery Rate (CADR) should be 3 times the volume (in m^(3)). 120 m^(3) × 3 = 360 m^(3)/h CADR. If you have allergies or high pollution levels, you'll want to multiply the room's volume by 4-6. Using the 120 m^(3) value, CADRs should be 480 - 720 m^(3)/h. If you have no budget, I'd go for the [IQAir Atem X](https://www.iqair.com/products/atem-series/atem-x?Style=EU+Plug+Type+C). It's made in Germany. Per the AHAM AC-1-2020 standard, top Smoke CADR is 422 CFM or 716.983 m^(3)/h. The CADR I've listed for the Atem X applies to the highest airflow speed/setting only. Lower settings will have lower CADRs which reduces cleaning effectiveness.