The heat is on to grab the best deals before Amazon Prime Day ends tonight. The best Prime Day air conditioner deals will help you get relief from the heat fast and under budget. On the final day of the sale, you can still save with air conditioner deals from top brands, though we've already seen some sell out early.
Your top priority is likely trying to stay cool, so we've scoured hundreds of products to save you time. We've found big discounts on our top picks for the best air conditioners and best portable air conditioners. There are also some notable discounts on specific units we haven't tested, but they're from reputable brands we trust.
One standout deal is on Midea air conditioners. The Midea U, one of the best AC units we've ever tested, is $100 off at Amazon right now. The steep deal — which is better than last Prime Day's — is likely because the Midea U was recalled earlier this spring for drainage issues that led to mold growth in some units. Fortunately, these sale units have been fully repaired to fix the issue, and we still confidently recommend this AC. Its unique U-shaped design allows you to open the window on cooler days without taking the unit out — a great feature if you live somewhere with variable weather during the summer. GE, Frigidaire, and Whynter are among the other popular brands on sale right now.
If you're shopping for other bargains across home or want to upgrade your TV or other devices on a budget, check out our main Prime Day deals hub.
The best Amazon Prime Day air conditioner deals
The Midea U Inverter Window Air Conditioner features a unique design that allows you to open the window when it's installed. While it was recently recalled, the units available for purchase have been repaired, and it remains one of our top AC picks.
- Unique U-shaped design
- Energy Star "Most Efficient" certification
- Easy to install in a wide array of windows
- Comes with a support bracket
- Quiet 48-decibel operation
- Smart connectivity that works well
- Can only change airflow direction horizontally
- Average cooling
The LG LP0621WSR Portable Air Conditioner is the most affordable unit we tested and does a decent job of cooling while making relatively little noise.
- Good for cooling smaller rooms
- Low energy consumption (for a portable AC)
- Easy to set up and install
- Fits a broad range of windows/openings
- Ran into trouble moving it from room to room
- Minimal warranty
The Whynter ARC-14S Dual Hose Portable Air Conditioner may be big and not as portable as other units, but it did the best job of cooling our 550-square-foot test room.
The TOSOT Muse 12,000 BTU Mini-Split Air Conditioner offers powerful, whisper-quiet cooling and heating for three rooms — all without the need for ductwork. With built-in WiFi, energy-efficient inverter technology, and a sleek, modern design, it’s a smart, year-round climate solution that blends seamlessly into any space.
If aesthetics are important to you, Windmill makes one of the most attractive and easy-to-install ACs on the market. This 10,000 Btu unit should comfortably cool up to 450 square feet and is WiFi enabled so you can control it from anywhere.
The Midea Duo Smart Inverter Portable Air Conditioner has a feature-rich app that pairs with Amazon Alexa and Google Assistant for voice control, and it does an outstanding job of cooling while operating quietly.
This 8,000 BTU portable AC is one of the top selling units on Amazon, suggested for rooms up to 350 square feet.
If you're looking for something a bit different than the standard white AC unit, this black model from GE is a solid bet.
This Frigidaire window air conditioner features an energy-efficient inverter compressor that balances impressive cooling power with electric costs.
What should you look for in an air conditioner?
Window AC vs. portable AC: We think a window AC is best for most people; they're more energy efficient, better at cooling, and less expensive upfront. However, a portable AC might be a good option if you don't have windows that will accommodate a traditional unit. Check out our guide to portable air conditioners versus window air conditioners for a more detailed breakdown.
Wall units: While window and portable ACs are the best options if you rent, you may consider a wall unit if you own your home. Wall ACs come in two styles: through-the-wall units and ductless mini-split units. We don't generally recommend a through-the-wall AC unless your home already has a sleeve for one. Ductless mini-split air conditioners are a good alternative to through-the-wall ACs and a great option for homes that want the experience of central air without installing the ductwork. These units consist of a wall-mounted air conditioner connecting to a small condenser outside your home. You'll still need to drill through the wall (and should hire professional help), but it's much less expensive than installing central air.
Energy efficiency: Energy-efficient units are better for the environment and keep your cooling costs low. Most window AC picks in our best air conditioner guide are Energy Star certified, but no portable units have earned this designation. We've found that window units with a variable speed compressor are the most efficient at cooling and the cheapest to run.
Btu: It's common for model numbers for the same units to vary by one or two digits; this usually denotes different Btu ratings — a measurement of the cooling power of your air conditioner. It may be tempting to buy an AC with, but if you get a unit that is too big for your room, it will cool too quickly without removing the moisture, leaving a cold, clammy environment. Use the table below (from the Energy Star website) to determine what Btu your room requires:
| Room size | Cooling power needed |
| 100 to 150 square feet | 5,000 Btu |
| 150 to 250 sq. ft. | 6,000 Btu |
| 250 to 300 sq. ft. | 7,000 Btu |
| 300 to 350 sq. ft. | 8,000 Btu |
| 350 to 400 sq. ft. | 9.000 Btu |
| 400 to 450 sq. ft. | 10,000 Btu |
| 450 to 550 sq. ft. | 12,000 Btu |
| 550 to 700 sq. ft. | 14,000 Btu |
Keep in mind you may need a unit slightly larger Btu if the room you're looking to cool has a ceiling over 8 feet high, is very sunny, or is a kitchen.
Shopping for more discounts today? Check out our roundup of all of the best Prime Day deals, or browse Amazon's website for the full selection.
