The best window air conditioners of 2024

We’ve put together some performance charts to make it easier to see how each unit held up in our tests. In the graphic below, you will see different layouts for larger and smaller units.

The Keystone unit came in first for the larger units, maintaining a set point of 68°F for 54.3% of its run time, followed by the Toshiba unit at 35.1% and finally the Frigidaire unit at 26.5%.

The GE Profile AHTT08BC dominated this test, coming in first among the smaller units with an impressive 94.7%, while the other GE unit maintained 68°F for 32.5% of the run time. We’re not directly comparing the performance of the larger and smaller units, but it’s worth noting that the AHTT08BC came in first overall, besting all the other units with its ability to maintain a set temperature of 68°F.

In the second test – how well each unit maintained its lowest temperature – the results were closer to each other. Among the largest units, Frigidaire ranked first with 58.9%, followed by Keystone with 54.3% and Toshiba with 43.7%.

The GE Profile AHTT08BC maintained its lowest temperature 61.6% of the time, while the GE AHEC05AC maintained its lowest temperature 53.6% of the time.

For the next set of graphs, we looked at each unit’s temperature changes over time.

Among the larger units, the Frigidaire, Toshiba, and Keystone units followed very similar patterns as they worked toward the set temperature of 68 degrees.

The chart for the smaller units is more interesting, as it shows that the GE Profile AHTT08BC gets cooler much more quickly than the AHEC05AC. AHTT08BC got cooler faster, but had more dramatic temperature changes. The AHEC05AC cooled more slowly but showed less overall contrast.