Is an $800 purifier best to clean your home's air? We lab tested 5 top brands

To save you time, the best purifiers are: 1. BlueAir 2. Germ Guardian 3. DIY 4. Honeywell 5. Dyson 6. Levoit

I rate Dyson for sending someone to talk about this. Too many companies hideaway. Great episode!

My take away is that, like they mentioned early on in the video, all of them uses HEPA filters so what matters most is the airflow that these purifiers generate through the filters. The reason why that DIY filter works so well is probably the fact its a HUGE fan.

11:20 - Our air under a microscope 12:49 - The test results 16:32 - Talks about the essentials oil diffuser 17:02 - Humidifiers 17:52 - Great tips (aka cheap solution for air purifications)

Kudos to Dyson for appearing on camera.

Poor Dyson engineer. They clearly cut up his responses. It would have been nice to know what his explanation was since they were the only company willing to talk.

I would give this video an 8 out of 10...they did a good job and included several different perspectives. However, they never mention the size of the area they tested in comparison to the room size recommendations for each product. Naturally the smaller filter will get a lower CADR in a bigger room. Also, I would like to know why particulate count is important and if mineral particulates for example are even bad for us or could even be good for us?? Lastly, as a Certified Mold Inspector myself, I know that a lot more goes into the mold analysis than just a visual inspection and air quality testing. The lab results only show a snapshot of the mold count in that exact time and location. I would be willing to bet that the lady with the mold in her home actually has a serious mold problem and needs treatment.

I actually respect Dyson more now, given that they agreed to interview and the guy raised excellent points too.

I can definitely confirm that Dyson sales people will just show you their product but will never force you to buy. They themselves have told me to research it and if we think it's worth buying then we can always come back.

That one family with the mom coughing in the basement should consider getting tested for radon.

I applaud Dyson for coming on camera! I’ve seen so many of these where the companies decline that opportunity. Regardless of the outcome, I’m proud of Dyson!

I have Large Levoit purifier in pet room and the one presented here in bedroom. Both are quiet and works great. Helping with my allergy and asthma as well as not letting in stench from my smoking neighbours. Definitely match size of your purifier not only with room size but also considering how you gonna use the room.

One more thing everyone should look for is availability and cost of replacement filters. This will make all of the difference if you intend to use the device longer.

🤣Poor Dave from Dyson. I feel that his in depth explanation was edited. Made him look a right plum.

I think you should have compared purifiers with more or less the same "room space" on their packaging. Of course, the Levoit loses, it's tiny. That's how physics works.

Dyson is the only one that offers cooling + heating. Its not solely designed for air purification. There's a premium cost to have that all in one device instead of three. If you live in a small space, the fan+heat+air purification in one sleek package from a company that makes insanely dependable products could be worth that premium. Kudos to Dyson for showing up!

Dyson has a point tho -- can't really base everything off of one metric...I was expecting a more thorough answer from these videos but they're a bit misleading. Too many variables not accounted for and it doesn't seem like they had a standard for picking which devices from each brand to test. Some might have been for smaller spaces, therefore .. the glaring results. Ah...

This could have been a great study. However it was flawed from the beginning. They're not testing Apple to Apple's comparison. The Honeywell that was tested as well as the germ guardian are not comparable to blue air. They're much smaller they're purifiers. They should have used the Honeywell HPA300 which is more comparable to blue air. It's much larger and meant for bigger rooms. You can't compare small room air purifiers with big room purifiers. The CADR ratings will of course be different because they're meant for different size rooms. I can't believe this is actually gotten so many views.

There's a problem here: The CADR is important, but it doesn't tell you how thoroughly it filters the air. Some of the purifiers shown had carbon filters that absorb gases and fumes, among other things that pass through HEPA filters like the Filtrete too easily. CADR is an airflow metric. You need both good airflow and proper filtration

To be fair, I feel like you should have compared air purifiers rated for equivalent size spaces. For example the larger Honeywell 300 is more closely matched to the Blueair you tested and the CADR of that model is about the same as the BlueAir. Also make sure the Blueair model you select used true HEPA filtration as the Honeywell does. Some Blueair models use HEPA but not all do. In addition, the term true HEPA is a standard defined by government regulation. “HEPA Silent” and other “ HEPA-like” filters, there is no defined standard.