Summer has just begun, and we’re already seeing multi-day heatwaves, which means you’ll need ways to stay cool for both your comfort and health. If your air conditioner or fan isn’t strong enough to handle the heat, don’t worry; we’ve found several of them that are powerful, on sale, and can arrive quickly—especially if you’re an Amazon Prime subscriber. We’ve included both portable and window air conditioners, in case you have a smaller space and want to move a single unit from one room to another. 

Many of them also have a “fan” feature that provides relief on warm days when an air conditioner isn’t necessary. Some fans and air conditioners on sale are “smart,” allowing you to turn them on and off using an app on your phone. That’s very convenient, as you can turn on your AC before you leave work and come home to a comfortable room. Doing so is also more energy efficient than running your air conditioner all day, even on a low setting. 

If you need air conditioning in a room with a tricky window, Dreo’s Portable Air Conditioner 515S is the right model. It can be installed in rooms with a sash or horizontally sliding windows between 17 and 53 inches tall or wide. Dreo says the 515S can cool down an area up to 300 square feet, and it doesn’t require a drainage host to collect liquid when you use its fan or cooling modes. If you plan on installing an air conditioner in your bedroom, the 515S was designed to make only 46dB (decibels) of noise at its lowest cooling setting, so you can run it while you sleep. 

Dreo’s Portable Air Conditioner 515S is a smart model that can be controlled in four ways: pressing buttons on the AC itself, using the included remote, via a smartphone app, or hands-free by using Amazon Alexa or Google Assistant. You’ll need to connect the 515S to your home’s Wi-Fi network to control it via an app, and you’ll also need a compatible smart speaker to make adjustments using a smart home assistant. A circular screen on the front of the air conditioner displays the set temperature, current Wi-Fi status, and the mode being used. It’s large enough that you should be able to see it clearly from across the room. In terms of window compatibility, control flexibility, power, and price, you won’t find a better air conditioner deal right now.

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