Most people don’t think about air quality until it becomes a problem. It might not be random if you’ve ever felt sluggish in a home office or noticed your allergies acting up indoors. CO2 levels, ...

This battery-powered sensor doesn’t do a whole lot, but it’s an inexpensive way to get-at-a-glance temperature and humidity readings, with long-term reporting in the SwitchBot app. Today’s homeowners ...