Across thousands of homes, bathroom ceilings hum with exhaust fans that sound busy but leave mirrors fogged, grout damp, and ...

Experts explain what to look for in air purifiers and humidifiers.

Q: My husband and I just moved from Reno, Nevada, to Baytown, Texas, and the humidity here is high, even indoors. What's the ideal home humidity level indoors, and is there anything we can do to feel ...