Kenmore KM8K-R 8,000 BTU Window Air Conditioner vs Soleus Air 6,000 BTU Over-the-Sill Air
Updated July 2026 — Kenmore KM8K-R 8,000 BTU Window Air Conditioner wins on cooling btu and power cord, Soleus Air 6,000 BTU Over-the-Sill Air wins on sill width and weight.
The Kenmore KM8K-R offers superior cooling power and energy efficiency at a lower price, making it the better choice for most users. The Soleus Air excels in design and smart features but comes at a higher cost.
Why Kenmore KM8K-R 8,000 BTU Window Air Conditioner is better
Cooling Power
Kenmore has 8,000 BTU vs Soleus's 6,000 BTU.
Price
Kenmore is $248.99, while Soleus is $469.99.
Energy Efficiency
Kenmore has a CEER rating of 10.9.
Why Soleus Air 6,000 BTU Over-the-Sill Air is better
Design
Soleus features an over-the-sill design.
WiFi Control
Soleus offers WiFi connectivity for remote access.
View
Soleus does not obstruct window view.
Overall score
Specifications
| Spec | Kenmore KM8K-R 8,000 BTU Window Air Conditioner | Soleus Air 6,000 BTU Over-the-Sill Air |
|---|---|---|
| Price | $248.99 | $469.99 |
| CEER Rating | 10.9 | N/A |
| Modes | 4 | 3 |
| Remote Control | Yes | Yes |
| Installation | Easy | Tool-free |
| Filter Type | Washable | Washable |
Dimension comparison
Design and Installation
The Kenmore KM8K-R offers a traditional window-mounted design, while the Soleus Air 6 features an innovative over-the-sill configuration. The Kenmore is designed to fit standard windows, making it easy to install without any structural changes. In contrast, the Soleus Air allows for a safer installation by straddling the window sill, eliminating the risk of falling out. This unique design not only simplifies installation but also allows you to maintain a clear view and use the window functionality. The Kenmore weighs 44.8 lbs and is compact enough for single-person setup, whereas the Soleus Air boasts a tool-free installation process that appeals to those looking for a hassle-free experience.
Cooling Power
In terms of cooling capacity, the Kenmore KM8K-R outshines the Soleus Air with its 8,000 BTU rating, making it suitable for medium-sized rooms up to 350 sq. ft. Meanwhile, the Soleus Air has a cooling capacity of 6,000 BTU, ideal for smaller spaces. The difference in BTU translates to more effective cooling in larger areas, making the Kenmore a better choice for bedrooms or living spaces where cooling efficiency is critical. Therefore, if your primary need is robust cooling for larger rooms, the Kenmore KM8K-R is a more powerful option.
Noise Levels
When it comes to operational noise, both the Kenmore KM8K-R and the Soleus Air prioritize quiet operation, but they achieve it in different ways. The Kenmore features a multi-mode operation with three fan speeds, allowing for efficient cooling with minimal noise. Its design is tailored for quiet performance, making it suitable for bedrooms and workspaces. The Soleus Air, however, is designed to move noise outside, further minimizing disturbances indoors. If noise is a primary concern, both units provide quiet operation, but the Soleus Air might have an edge due to its unique design that keeps sound external.
Energy Efficiency
Energy efficiency is a significant factor when choosing an air conditioner. The Kenmore KM8K-R boasts a CEER rating of 10.9, which ensures effective cooling while reducing energy consumption. This efficiency can help minimize utility costs over time. On the other hand, the Soleus Air, while not explicitly rated in the provided data, includes features such as a 24-hour timer and energy saver mode, promoting energy savings. However, without a specific CEER rating, it’s difficult to make a direct comparison. The Kenmore’s established efficiency rating makes it a more predictable choice for energy-conscious consumers.
Features and Controls
The Kenmore KM8K-R is equipped with easy digital controls and an included remote, allowing for convenient operation from across the room. It also offers multiple operating modes, including Sleep, Auto, Eco, and Cooling modes, enhancing user comfort and flexibility. Conversely, the Soleus Air stands out with its WiFi capability, allowing users to control the unit remotely via smartphone or voice commands through Alexa or Google Home. While both units provide user-friendly controls, the Soleus Air’s WiFi functionality offers modern convenience that might appeal more to tech-savvy users.
Maintenance
Maintenance is straightforward for both air conditioners, but they offer different approaches. The Kenmore KM8K-R features a washable filter that improves air quality and reduces maintenance efforts. Its auto-restart function also ensures that settings are resumed after power loss, which is a practical feature. The Soleus Air also includes a washable and reusable filter, which can be rinsed regularly to maintain performance. Both units are designed for low maintenance, but the Kenmore’s additional features for air quality and automatic settings make it slightly more user-friendly in this regard.
Price Comparison
The Kenmore KM8K-R is priced at $248.99, making it about 47% cheaper than the Soleus Air, which is priced at $469.99. This significant price difference can be a determining factor for budget-conscious consumers. While the Soleus Air offers advanced features like WiFi connectivity, the Kenmore provides robust cooling performance at a more accessible price point. If budget is a primary consideration, the Kenmore KM8K-R presents a compelling argument for those needing effective cooling without breaking the bank.
Which should you buy?
Choosing between the Kenmore KM8K-R and the Soleus Air ultimately depends on your specific needs. The Kenmore is the superior option for those seeking powerful cooling for larger rooms, energy efficiency, and ease of maintenance at a lower price. However, if you value innovative design, WiFi control, and the ability to maintain an unobstructed view through your window, the Soleus Air may be the better choice despite its higher price. Assess your priorities—whether they are cooling power, features, or cost—before making your final decision.

