The world is warming, and extreme heat is becoming more frequent. Air conditioning can help alleviate the stifling summers, but choosing the right unit matters for both comfort and energy efficiency.

Our top pick, the Midea's 8,000 BTU U-Shaped Smart Inverter, offers a blend of coolness and smart features, though it still allows you to open your window. It’s among the most energy-efficient options, using modern coolants that don’t harm the ozone layer.

While heat pumps are more efficient, they require expensive installation. Models like the Della Optima Series 12,000 BTU with a 23 SEER2 rating are becoming more accessible but come at a steeper price.

Budget-conscious users can opt for models such as GE’s 5,000 BTU air conditioner, which is surprisingly quiet and affordable. However, budget models tend to be less efficient, leading to higher energy bills over time despite the lower upfront costs.

The world of portable ACs is equally varied. Units like EcoFlow Wave 2 offer versatile power options but require careful placement near a window. The Zero Breeze Mark III, while more powerful, comes with its own set of trade-offs in terms of weight and battery costs.