The Ultimate Guide to Choosing the Perfect Window Unit for Your Casement Window


Casement windows are a popular choice for homeowners due to their versatility, energy efficiency, and elegant appearance. However, finding the right window unit for your casement window can be a daunting task. This comprehensive guide will help you navigate through the various options available in the market and assist you in selecting the perfect window unit for your casement window.

Types of Window Units for Casement Windows

1. Casement Air Conditioners

Casement air conditioners are specifically designed for narrow, vertical windows. These units are perfect for casement windows because they can be easily installed in the window opening with minimal modifications. Some popular casement air conditioner brands include Frigidaire, LG, and GE.

2. Portable Air Conditioners

Portable air conditioners are a versatile solution for casement windows. These units can be placed on the floor and vented through the window using a window installation kit. Portable air conditioners are available in various sizes and capacities, making them suitable for different room sizes.

3. Window Fans

Window fans are an energy-efficient alternative to air conditioners. They can be easily installed in casement windows and help improve air circulation in the room. Dual window fans, which feature two separate fans, can be set up to draw fresh air from outside and expel stale air from inside the room.

Factors to Consider When Choosing a Window Unit

1. Size and Capacity

The size and capacity of the window unit are crucial factors to consider. Measure the dimensions of your casement window and choose a unit that fits perfectly. Also, consider the cooling or heating capacity of the unit, which is typically measured in British Thermal Units (BTUs). A higher BTU rating indicates a more powerful unit, capable of cooling or heating larger spaces.

2. Energy Efficiency

Energy efficiency is an essential aspect to consider when selecting a window unit. Look for units with a high Energy Efficiency Ratio (EER) or Seasonal Energy Efficiency Ratio (SEER) rating. These ratings indicate the efficiency of the unit in terms of energy consumption. A higher rating means the unit consumes less energy, saving you money on utility bills.

3. Noise Level

The noise level of the window unit is an important factor, especially if it will be installed in a bedroom or living area. Look for units with a low decibel (dB) rating, as they produce less noise. Some advanced models also feature a sleep mode, which reduces the noise level during nighttime operation.

4. Installation and Maintenance

Choose a window unit that is easy to install and maintain. Casement window air conditioners often come with installation kits that simplify the process. For portable air conditioners and window fans, ensure that the window installation kit is compatible with your casement window. Regular maintenance, such as cleaning filters and checking for leaks, is essential to keep the unit functioning efficiently.

Additional Features to Look For

Remote Control:A remote control allows you to adjust the settings of the window unit from a distance, providing added convenience.

Programmable Timer:A programmable timer enables you to set the unit to turn on or off at specific times, helping you save energy and maintain a comfortable indoor temperature.

Air Filter:An air filter helps remove dust, allergens, and other particles from the air, improving indoor air quality. Look for units with washable and reusable filters for easy maintenance.

Final Thoughts

Selecting the perfect window unit for your casement window can significantly improve your home's comfort and energy efficiency. Consider the factors mentioned above, such as size, capacity, energy efficiency, and noise level, to find a unit that meets your specific needs. With the right window unit, you can enjoy a comfortable living environment while enhancing the aesthetic appeal of your casement windows.

Casement Window


Casement windows are the most common style of window. They feature hinged panels that swing open and closed. Casement windows are available in single panels or multiple panels. The direction a door swings, either to the right or the left, is called the handing. In addition to handing, window are identified as either inswing or outswing depending on whether they open into the house or towards the outside.


Our team of experts will work with you to develop a bespoke plan that fits your needs. We take a holistic approach to the planning process, combining our technical expertise with our knowledge of customer requirements and project constraints.


Freedom to dream "truly custom-made"

Doorwin provides one-stop solution for professional windows doors manufacturer and installation. We have been serving customers with our high quality and branded products in United States, Asia and worldwide.


This newly built private house is in Sydney, Australia. The area occupied by the fenestration system in our scheduled design drawings was up to more than 110 square meters. A wide range of design details made the perfect mix of modern aesthetics and traditional sophistication, the simulated vertical hung windows with tilt & turn opening systems in this home are absolutely breathtaking. SDLS (Simulated Divided Lites with Spacer Bar) brings some historical vintage feeling to the whole building without losing any energy saving performance. Long narrow fixed windows creating larger-than-life expenses, coupled with German high-end systems made this project stand out from the rest.

Simulated Hung Window with Tilt & Turn Openings

The client's idea was to maintain a certain vintage feel, and our aim was to meet the energy efficiency needs and standards of modern houses as much as possible while maintaining a retro design. Doorwin’s 61S simulated hung windows with tilt & turn openings is a respectful modernization of a classic architectural masterwork.

Why choose the tilt and turn opening method?

Because it generally has better air seals than sliding, single hung, or double hung window frames. Tilt and turn windows form a complete seal when fully closed, this means they are less prone to water leakage, and cold draughts and you’ll keep more of your heating indoors where it belongs. They can be opened in the upper tilt way to ventilate at a minimum opening status and are easy to clean outside of the glass; when there’s a good day, they can be opened as normal inward casement windows.

Large Energy Efficient Fixed Windows

Our well-crafted bespoke systems enhance the functionality and panoramic view of this modern house.

Huge, fixed glass walls up to seven meters long and two meters high bring great lighting and open views, making it really refreshing to the mind. Five meters high long narrow windows give the whole building a contemporary aesthetic.

Every window’s placement and shape not only add to the uniqueness of this home but also provide a more energy-saving ability for the owners.

Doorwin energy-efficient integrated glazing units feature double-pane glass, warm-edge spacers, argon gas fill, Low-E coatings, and fully tempered glass, they can not only create a comfortable and natural indoor environment but also save electricity bills and heating bills of more than 100 USD for the owner, it’s a real bargain compared to choosing a regular glazing set.

Custom Designed Thermal Break Aluminum Entry Door

Aluminum Door offered an air of uniqueness and elegance to a home. With their luxurious patterns and beautiful finishes, it provides this house with a bounty of aesthetics and security. Aluminum entry doors allow you to resist any weather extremes, corrosion, and pests. So aluminum is one of the most resilient and durable materials you can select for front doors considering the price/performance ratio.

With pieces of double panes, and Low-E tempered glass. The door provides a good insulation performance.

Custom Designed Grilles and Transom

Divided lite windows and doors offer unique architectural solutions for buildings without compromising energy efficiency or aesthetics. Doorwin provides multiple muntin and glass options to customize your divided lite windows and doors. Further customization is available with a variety of colors and materials, creating an infinite number of design combinations to best suit your style.

In this project, we use SDLS (simulated divided lites with spacer bars), these bars permanently adhere to both sides of the glass, and spacer bars are installed between the glass, this is the most energy-efficient way to create the look of classical décor grilles. The windows in the bathroom bedroom and study have an Arch Transom Design, making these rooms, which are often used by the owner, have some traditional aesthetics.

BTW, Doorwin offers free design assistance, so if you need a custom design like this one, contact us right away and we will provide you with the most aesthetically and functionally pleasing design solution.

German Imported Hardware System

For windows and doors, hardware is as important as the engine is to the car. The continuous technological innovation of the European hardware industry has strongly promoted the performance improvement and functional innovation of windows and doors. In this project, Doorwin uses Hoppe™ multi-point locks, hinges, and handles from Germany.

Multi-point lock systems provide not only the burglar-resistance but also a tighter compression seam, making the window keeps good energy-efficient performance. Together with Technoform Bautec’s insulation edge bond and sealant strips, these make up our products' top insulation and energy-saving performance.

Save Your Money On Installation Costs

We have several international patents to reduce clients’ labor costs, such as our unique flanges and assembly type tubular design, which is different from the other products on the market. What sets us apart among Chinese counterpart is that all our products are equipped with nail fin structures for quick and easy installation. Labor costs during installation may exceed of the window and door price, therefore, our exclusive patent allows users to not only get a significant increase in installation efficiency, but also greatly reduce the labor cost of window and door installation. A cost that may bring you unexpected savings that far exceed the price difference you may care about now.

Free Design Assistance

With our own expertise, we provided the no-cost design development and contract documentation with CAD & BIM drawings, including elevation, details about the project, and installation help.

Before production, we will provide accurate sample drawings, which will clearly show the cross-sectional pattern, size, opening method and direction, pattern of the warm spacer, and the installation nodes. We will not go into production until you have signed off on the drawing to ensure that you receive a final product that meets the exact requirements of your project.

About Doorwin

Doorwin's professional packing system guarantees all products are delivered safely and without any damage. We apply a four-point packing system. Firstly, adhesive plastic film is applied on interior wood frames and exterior aluminum frames to avoid scratches on the surface. Then, a paper board is applied after we apply air bubble film surrounding the whole windows/ doors to avoid any destruction or clash. Lastly, we place them into a durable non-fumigation plywood crate to avoid any possible damage during transportation.

With years of experience shipping our products worldwide, we could guarantee to ship our products to their final destinations intact and without any damage.

About Doorwin Factories

Doorwin is one of the most professional window & door manufacturers are known for its great customized products. In Doorwin, a variety of colors, styles, and sizes of products are available to meet the client’s unique requirements. We own three ISO9000-certified modern factories in China. With a factory area of 20,000 m2 and a production capacity of 100,000 m2 per year. Doorwin Group has the scale to ensure timely delivery and the flexibility to reduce manufacturing lead times to as short as 18 days.