Cleaning and humifying
When temperatures drop outside, the air in your house can get very dry. That means humidifier season. There are basically two types of humidifiers: cool mist and warm mist. They both add moisture to the air, but some newer models also promise to purify the air and kill bacteria, which is a common concern with these always-damp machines. Others have special technology in place to keep the machine relatively germ- and mold-free. Here's a look at nine machines that clean the air while they humidify it.