AIR
Air Purifier vs Humidifier vs Dehumidifier: Which One Do You Need?
These three appliances get shelved together in stores and bundled together in search results, which is how people end up buying the…
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Guides, reviews & news
Everything we have tested and learned about cleaner air and safer water.
AIR
Air Purifier Filter Types Compared: What Each One Actually Does
Open any air purifier and you will find a stack. Usually three layers, sometimes five if the marketing department got involved. Each…
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AIR
UV-C, PCO, and Plasma Air Purifiers: Do They Actually Work?
The pitch for these technologies is genuinely appealing. A filter traps things, which means you are living with a box full of…
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AIR
Ionizers, Ozone, and Air Purifiers: What Is Actually Safe?
If you have spent ten minutes shopping for an air purifier, you have run into the ozone question. One product page promises…
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AIR
Pre-Filters: What They Do and How to Clean Them
Pull the front panel off a purifier that has been running in a house with a shedding cat and you will find…
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AIR
What Is a HEPA Filter? True HEPA vs HEPA-Type vs H13/H14
You are looking at two air purifiers. One says “True HEPA.” The other says “H13 True HEPA” and costs thirty dollars more.…
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AIR
Activated Carbon Filters Explained (and Why Weight Matters)
The first time I pulled the filter out of a cheap purifier that advertised “activated carbon,” I expected heft. What came out…
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AIR
How Do Air Purifiers Work? The Mechanism Explained
An air purifier is a fan in a box with something fibrous in front of it. That is the honest one-line answer,…
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AIR
Water Filter Guide: Everything You Need to Know
Buying a water filter before testing your water is like buying medicine before a diagnosis. It is the single most common and…
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AIR
Air Purifier Guide: Everything You Need to Know
An air purifier is a fan and a filter. That is the whole machine. Everything that makes one purifier better than another…
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