Sometimes opening a window or running a fan is simply not enough to keep you cool in the heat ... The Windmill a/c unit has an attractive design that you won't hate looking at all summer.

A better predictor might be this innovative Window Phone (not to be confused ... Overall, though, we think this is a very cool design--even on a hot day. More pics after the jump.

Here’s how it works. Microsoft knows exactly what it wants to see its OEM partners focus on when building Windows devices for 2017: cool designs, new experiences, and better performance.

Our top pick overall is the Vornado Transom, thanks to its notably sleek design and wide speed ... Below, the six best window fans to keep indoor air cool and fresh, based on our findings.