The new Cannon kicks butt (scientific definition of kicking butt), but it’s noisier than the Original DIY. How noisy is it? As is my habit, I wanted to answer this question scientifically. So I bought a decibel meter: And I tested the Cannon, Original DIY, Blue Air 203/270E, and IQ Health Pro Plus on their […]
Category: Air Purifiers
Recent Air Purifiers Articles:
Directly Comparable Tests: DIY vs Blue Air
I’ve wanted to know for a long time whether DIY air purifiers are as effective as the Ferrari filters. In an earlier post, I compared my data to the tests of Dr. Saint Cyr (whose excellent posts inspired me to look into filters in the first place). But I noted that the comparisons were far from […]
DIY Cannon: Better, Faster, Stronger
Ever since I started my DIY filter experiments, I’ve been wondering whether I could create a super DIY by using a stronger fan. In the past three months, my collaborator Anna has helped me test a half dozen different fans. She now has a home full of fans: After months of tests, one […]
Q&A: Does the DIY Consume Less Electricity Than Other Purifiers?
laundrylist 提问: What is the energy usage associated with running a cheap box fan for eight hours at night versus the two expensive models that you compared your cheaper model to? Excellent question! I’ve wondered about that myself. The fan is 50 Watts, compared to 27-215 for an IQ Air (depending on fan speed). So […]
Creative Workarounds DIY Purifiers
Adam in Suzhou sent me a picture of a creative solution to a filter problem. The fan he had at his house had an opening that was slightly larger than the HEPA. So Adam cut out a piece of cardboard to close up the edges. Great idea! Adam says, “It’s already turned slightly […]
Comparing Air Purifiers
Dr. Saint Cyr recently pointed me to great tests of air purifiers from the Shanghai Consumer Protection Bureau: The reason this type of research is so badly needed is that Western research (like this report from Consumer Reports) focuses on allergens, not general industrial air pollution. Allergens are probably more relevant for most Americans, but […]
Independent Confirmation
Independent Confirmation. I’ve always suspected that what I’ve “discovered” is so basic that people must’ve known about this before. Lo and behold, doctors at the University of Michigan recommend that people who suffer from allergies make a purifier for $25 with a furnace filter and a box fan. Getting independent confirmations of results is always […]
DIY Purifier Tests
How do I know if a DIY purifier works? I think you can break this down into two questions： Is the air coming out of the DIY purifier clean? The test results are as clear as can be. The DIY purifier shoots out very clean air. But is that enough to actually clean the ambient room air? […]
DIY Air Outlet Tests
I made a video to show if the air coming out of the HEPA filter of my DIY is clean. See the filter in action. This settles that the air is coming out clean. But is that enough to actually clean the room air? See the room test data and how it compares to the Ferrari filters.
How to Make a DIY Air Purifier
How can we make a homemade DIY air purifier? Air purifiers can be extremely expensive. But they don’t need to be. After researching how different air filters work, I concluded that a HEPA filter is all that’s needed to make an effective air purifier. Given that most air purifiers sell for thousands of dollars, I […]
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