We've been independently researching and testing products for over 120 years. If you buy through our links, we may earn a commission. Learn more about our review process.A portable air conditioner is just what it sounds like — a mobile device that delivers cool air where and when you need it most. These ACs are much cheaper than whole-house central air systems and they don’t need to be parked on a window sill, like a traditional room air conditioner, and will provide stronger cooling than a standing fan.For this report, the home improvement pros at the Good Housekeeping Institute reviewed and tested more than 30 portable air conditioners. Though central and room ACs still deliver top cooling power, the best portable ACs from our tests can maintain a comfortable 72º F during sultry weather (especially when paired with one of our top-rated ceiling fans) and they’re simple to set up and operate. After our top picks, you’ll find more details on how we test portable air conditioners as well...