Buying Guides

Complete buying guides covering HEPA filters, CADR ratings, room coverage, filter replacement costs, and everything to know before you buy.

Air Purifier vs Humidifier: Differences, Pros & Cons, and When to Use Which

Michael Chen / 2026年3月13日

Purifiers clean particles. Humidifiers add moisture. We break down when you need one, the other, or both (and which combinations actually work).

Michael Chen / 2026年3月8日

CADR is the most important air purifier spec — but almost no one explains it right. Learn how to read CADR numbers and spot marketing lies.

wangzhanlei / 2026年2月28日

HEPA filters aren’t all the same. We explain the difference between True HEPA, H13 medical grade, and why cheap HEPA-type filters don’t cut it.

Don’t buy an air purifier before reading this. Learn how CADR, HEPA grade, room size, noise, and filter cost affect your choice.