Indoor Air Guides

CADR, filter type, noise and ozone are the four specs that actually matter when choosing an air purifier for a small room or nursery. Here is how to compare them.

Babies are a more sensitive population for indoor air pollutants, and nurseries are often the newest room in a home. Here is what the research says and a practical checklist before the crib goes in.

PM1.0, PM2.5 and PM10 are particle sizes your air quality monitor tracks. Here is what each number means, why smaller is worse, and what raises them indoors.

New furniture off-gasses formaldehyde most heavily in the first weeks, but pressed-wood pieces can release it for a year or more. Here is the timeline and how to check your own rooms.

The WHO indoor guideline for formaldehyde is 0.1 mg/m3 over 30 minutes (about 0.08 ppm). Here’s what that means, how mg/m3 converts to ppm, and how to read a home monitor.

How to test for formaldehyde at home with a handheld detector: which rooms to check first, how to get a steady reading, and what to do if the number is high.