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5 Best Vertical Window AC Units For Sliding Windows (Narrow Units)

CEO Khai Intela
Having trouble finding the perfect air conditioner for your casement windows? Well, you're in luck! With the advent of vertical window air conditioners, homeowners with casement or sliding windows can now enjoy the much-needed cool...

Having trouble finding the perfect air conditioner for your casement windows? Well, you're in luck! With the advent of vertical window air conditioners, homeowners with casement or sliding windows can now enjoy the much-needed cool air during those hot summer months. These narrow AC units are specifically designed to fit the unique dimensions of casement windows, making them the perfect solution for homeowners in need of a narrow and tall cooling system.

But before we dive into the specifics, let's take a moment to appreciate the convenience and functionality of these vertical window AC units. Gone are the days of struggling to find a standard window unit that fits your casement window; these specially designed units are the answer to all your cooling needs.

Finding the Perfect Fit

To install a casement window AC unit, you need a minimum window width of at least 15 1/2 inches. It's essential to measure your window length to ensure that the unit will fit properly. Thankfully, most vertical AC units come with a special installation kit that simplifies the installation process. Just follow the instructions provided, and you'll have your new AC unit up and running in no time.

Casement or sliding window AC units Casement or sliding window AC units are high and narrow. They are usually 15" wide and about 21" high.

Top Picks for Vertical Window AC Units

While the market for vertical window AC units is relatively limited, a few manufacturers have stood out, offering some of the best options available. Frigidaire, Koldfront, and PerfectAire have consistently delivered high-quality AC units that meet the needs of casement window owners.

The top two picks are the 10,000 BTU Frigidaire FFRS1022R1 and the 8,000 BTU Koldfront CAC8000W. These units are widely considered the best choices for vertical window AC units on the market today.

Understanding the Terminology

Before we delve deeper into the specifications of these vertical AC units, let's clarify the terminology surrounding casement window air conditioners. The various names used to describe these units - such as casement, vertical, sliding, or slider window AC units - all refer to the same type of window air conditioner. These terms are often used interchangeably, so don't get confused when researching these units.

Casement = Vertical = Sliding = Slider

Now that we have a clear understanding of the terminology, let's take a look at the five key factors to consider when choosing a slider window air conditioner.

5 Key Factors to Look for in Slider Window Air Conditioners

1. Cooling Capacity (Measured in BTU/hr)

The primary purpose of a casement window AC unit is to provide a cooling effect. The cooling capacity is measured in British Thermal Units or BTUs. While standard window units range from 6,000 to 15,000 BTUs, vertical AC units are typically limited to 8,000 or 10,000 BTUs. The 10,000 BTU units, in particular, are highly sought after due to their versatility and efficiency.

2. Recommended Coverage Area (Based on BTU)

To ensure optimal cooling efficiency, it's important to consider the recommended coverage area based on the BTU rating of the AC unit. A general rule of thumb is that for every 20 BTUs, the AC unit can cool down approximately 1 square foot of space. For example, a 10,000 BTU unit is suitable for cooling an area of up to 450 square feet. It's always advisable to choose an AC unit that matches the size of the room for maximum cooling effectiveness.

3. EER Rating (Energy-Efficiency, Important for Long-Term Savings)

Energy efficiency is a crucial factor to consider when selecting any air conditioning unit. The higher the Energy-Efficiency Ratio (EER) rating, the more energy-efficient the AC unit is, resulting in lower electricity costs over time. Look for units with EER ratings of 10 or higher to ensure optimal energy efficiency.

4. Minimal Window Width and Height (Important for Proper Installation)

One of the main advantages of vertical window AC units is their narrow width, allowing them to fit seamlessly into casement windows. These units typically have a width of 15 inches or less, but it's important to consider the additional width added by the installation kit. Most top-rated casement window AC units require a minimum window width of 15 1/2 inches. Additionally, ensure that your window's height falls within the specified range for proper installation.

5. Noise Levels (Quiet Casement Window AC Units are Preferred)

Nobody wants a noisy air conditioner disturbing their peace and quiet. To ensure a comfortable and pleasant environment, it's essential to choose a casement window AC unit with low noise levels. Anything below 60 dB is considered relatively quiet. Keep in mind that different units may provide noise levels for both the inner and outer sides of the window, so it's crucial to consider the noise level that will affect you the most.

Now that we have a good understanding of the key factors to consider when choosing a vertical window AC unit, let's take a closer look at the top-rated options.

Best Casement Window AC Units (Useful for Vertical Windows)

  1. Frigidaire FFRS1022R1: The overall best casement window air conditioner, offering a cooling capacity of 10,000 BTUs. With its easy installation process and energy-efficient design, the Frigidaire FFRS1022R1 can adequately cool spaces of up to 450 square feet.

  2. Koldfront CAC8000W: If you're looking for a compact and quiet option, the Koldfront CAC8000W is the perfect choice. With its 8,000 BTU cooling capacity and an impressive EER rating of 11, this unit offers optimal energy efficiency and quiet operation.

  3. PerfectAire 3PASC10000: Another excellent option is the PerfectAire 3PASC10000, which boasts a cooling capacity of 10,000 BTUs. This reliable unit provides efficient cooling for rooms up to 450 square feet, making it an ideal choice for larger spaces.

  4. Keystone KSTSW10A: With a cooling capacity of 10,000 BTUs, the Keystone KSTSW10A is perfectly suited for cooling down rooms with casement windows up to 450 square feet. With its three fan speed settings and four-way air direction control, you have the flexibility to customize your comfort.

  5. Global Industrial MWDUL-10CRN1-BCJ4: While not as well-known as other brands, the Global Industrial MWDUL-10CRN1-BCJ4 still offers a solid 10,000 BTU cooling capacity. With its included installation kit and user-friendly features, it's a decent option for those in need of a reliable casement window AC unit.

Remember, when selecting a casement window AC unit, be sure to consider your specific needs and the specifications of your window to find the perfect fit for your home.

If you have any questions regarding these niche casement window AC units, feel free to leave a comment below. We are here to help you make the best choice for your cooling needs!

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