Here's Why Window AC Units Have To Actually Be Mounted To A Window To Work

They look like cold-air boxes, but window ACs hide a secret that explains why they need a window. Here's why you can't just set them on the floor.
Hosted on MSN

Are the Best Air Conditioners Window Units or Portable A/C? We Tested Both to Find Out.

Summer can either be something to endure or something to enjoy, depending on your perspective. But either way, living with air conditioning makes a tremendous difference in how comfortable you feel ...
Popular Mechanics

Portable A/C vs. Window A/C: We've Tested Both. So Which Is Better?

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 ...