794 followers
566 followers
RT @adsquires: Why is indoor air drier in winter? Cos it's come from outdoors, and it's colder outdoors, and colder air holds less water.…
658 followers
RT @adsquires: Why is indoor air drier in winter? Cos it's come from outdoors, and it's colder outdoors, and colder air holds less water.…
4,849 followers
@CathNoakes @SmartAirFilters @mishwoz @CleanAirClassrm @chrischirp @kprather88 @JbcLiftec @jljcolorado Non-interactive one here. Great thread btw, wish I'd known / remembered it before writing this one https://t.co/zaBMLJkSDU