We've spent the last several months testing window air conditioners and portable air conditioners and found that while window units cooled rooms faster, it wasn't that much faster. It's true that ...

A window AC unit will not be as expensive as central air and it will still keep your home cool through the hottest months of the year.

As is the case for many people, my home cannot be retrofitted with central air. My 100-plus-year-old Brooklyn apartment, which features prominently in my seven years of air quality reporting for WIRED ...