Black and Decker, and more top brands People / Francesca Fasciglione With record temperatures and blistering heat waves across the country, now is the perfect time to invest in a powerful air conditioner. Whether you prefer a window unit or a portable ...

Luckily, Amazon's No. 1 best-selling portable air conditioner is a great choice for the hot summer months and it's currently on sale. Not only is the powerful Black+Decker portable air conditioner backed by over 30,500 perfect ratings from shoppers, but it is also 21% off thanks to this must-see Amazon Prime Day deal.

Update 7/16/24: Since we published on July 15, we've seen different BTU levels for each air conditioner with different discounts. The Keystone window air conditioner and the Whirlpool portable air conditioner originally listed for 12,000 BTU models were no longer on sale. The 10,000 BTU units from each brand, however, are still on sale.