The Best Over-the-Sill Air Conditioners of 2023

Tom Scalisi
·3 min read
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Over the Sill Air Conditioner Review
Over the Sill Air Conditioner Review

Over-the-sill air conditioners have some huge benefits. These units have upside-down, U-shaped designs that saddle the window sill. The noisy stuff, such as the compressor and other mechanicals, lives outside while the fan and control panel (the quieter stuff) hang below the window, inside the house. This allows folks to open and close the window as they wish while enjoying less noisy operation—the best of both worlds.

But which is the best over-the-sill air conditioner? I think it’s the 6,000 BTU (British thermal units) model from Soleus Air. It’s quiet, provides plenty of power, and lets me open my office window anytime I want to. But is it perfect? Find out in this over-the-sill air conditioner review.

How We Tested the Best Over-the-Sill Air Conditioners

Air conditioners aren’t cheap, so we wanted to make sure that any model we suggested was truly up for the task. For that reason, we performed hands-on testing with the Soleus Air over-the-sill air conditioner to ensure it has what it takes. What’s more, we tested it along with multiple other air conditioners so we had some data to compare it to.

First, we installed the units and assessed that process. We noted how heavy or difficult the air conditioners were to lift and maneuver, as well as how easy or difficult it was to position and adjust each air conditioner according to the manufacturer’s instructions. Next, we cycled through the different modes and adjusted each AC to run at our desired settings. We allowed each model to run through hot weather, taking note of how quickly it cooled the room. We also assessed how quietly each model ran. Throughout these tests, we found the Soleus Air to be the best over-the-sill air conditioner.

More Over-the-Sill Air Conditioners Worth Your Money

The following are some other air conditioners worth checking out. The first option is a standard over-the-sill model, while the second is a U-shaped model, which has some significant differences but similar benefits (primarily window opening and noise level).

FAQs

Those who want more information about choosing an over-the-sill air conditioner—or about our Best Overall pick—can read on for answers to two of the most frequently asked questions on the topic.

Q. What is the most efficient air conditioner design? 

U-shaped and over-the-sill air conditioners are some of the most efficient designs. These models separate the interior space from the exterior better, and many utilize inverter technology. This allows the air conditioner to regulate its electrical draw based on the machine’s needs and settings.

Q. What are the modes of Soleus Air?

The Soleus Air over-the-sill air conditioner offers auto mode, air conditioner, dehumidifier, energy saver, sleep mode, fan, and “MyTemp Sensor.” The largest Soleus Air model even features heat.

Why Trust Bob Vila 

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Over the course of his decades-long career, Bob Vila has helped millions of people build, renovate, repair, and live better each day—a tradition that continues today with expert yet accessible home advice. The Bob Vila team distills need-to-know information into project tutorials, maintenance guides, tool 101s, and more. These home and garden experts then thoroughly research, vet, and recommend products that support homeowners, renters, DIYers, and professionals in their to-do lists.