Q&A
joshuaw81 提问: Hi Thomas, just started one of your cannon kits earlier today and it’s already turning gray. Already a fan of your work! Two quick questions for you: 1- I received a foam/fiber square...
View ArticleWhat Combination of Air Filters Do I Need to Protect Against Everything?
What combination of air filters do I need to protect against everything? This will sound like a grand claim, but two filters are all you need. Here’s why (with data). Very Reasonable Reasons To Be...
View ArticleWhy Air Purifier Pre-Filters May Be More Harm than Good
Most purifiers on the market come with a pre-filter. That would make one think that pre-filters must be a good thing, right? However, most purifier companies also love to selling people 6-stage...
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