The best portable air conditioners keep rooms cool when a window unit isn't an option. We test ACs for cooling ability, noise, and energy efficiency.

Right now, you can combine a discount on Amazon with an on-site Amazon coupon to get this cooling device for $43 off. This may not sound like much of a discount, but considering the air conditioner's immense popularity, we're surprised it's on sale at all. Remember, to get the best price, make sure you add the available $20 coupon before checkout.

With summer in full effect, now’s the time to do everything you can to stay cool. Unfortunately, air conditioners don't often come cheap, but with this deal from Walmart, you can get a well-reviewed portable A/C for just under $240 to help beat the heat.

As temperatures continue to rise, now is the time to prepare for the season ahead with ways to keep your home as cool as possible. Oscillating fans can only do so much, and that's why thousands of shoppers are turning to portable AC units instead.