Jalousie windows, with their distinctive horizontal slats that open and close like venetian blinds, present unique challenges for air conditioner installation. These windows, popular in tropical and subtropical regions, don’t accommodate standard window AC units easily due to their design. Homeowners with jalousie windows often struggle to find cooling solutions that work without permanent modifications. This article explores the various air conditioning options available for jalousie windows, installation methods, recommended models, and best practices to maintain efficiency while preserving the functionality of these distinctive windows.
Jalousie windows consist of multiple horizontal glass or acrylic slats that open and close simultaneously using a crank mechanism. These windows were particularly popular in mid-century homes built between the 1930s and 1960s, especially in warmer climates. The primary advantage of jalousie windows is their ability to provide excellent ventilation while offering protection from rain, making them ideal for tropical and subtropical environments.
The design allows for adjustable airflow by changing the angle of the slats. When fully closed, they provide reasonable weather protection, though they’re generally less energy-efficient than modern window designs due to air gaps between the slats. Their distinctive appearance contributes to certain architectural styles, including mid-century modern, ranch, and tropical designs.
Challenges of Installing Standard Air Conditioners in Jalousie Windows
Installing traditional window air conditioners in jalousie windows presents several significant challenges. The primary issue is the irregular opening created by the slated design, which doesn’t provide the flat, uniform surface needed for standard window units. When jalousie slats are removed, the remaining opening often has irregular dimensions that don’t match standard AC units.
Air leakage is another major concern. Even with modifications, the side channels of jalousie windows typically don’t seal well against a window unit, resulting in hot air infiltration and reduced cooling efficiency. Additionally, many jalousie windows have thin frames that may not support the weight of a traditional window air conditioner without additional reinforcement.
The crank mechanism and hardware of jalousie windows can interfere with proper installation, and permanent modifications may be necessary, potentially affecting the window’s functionality or architectural integrity. These challenges have led to the development of alternative cooling solutions specifically designed for homes with jalousie windows.
Air Conditioning Options for Jalousie Windows
Portable Air Conditioners
Portable air conditioners represent the most versatile solution for homes with jalousie windows. These freestanding units require only a small exhaust vent that can be accommodated even with the jalousie design. Most models come with window kits that can be adapted to fit between the slats or in a partially opened section of the window.
The main advantages include easy installation without permanent modifications, the ability to move the unit between rooms as needed, and no need for complex mounting hardware. However, they typically offer less cooling capacity per energy used compared to other options, occupy floor space, and may produce more noise since the entire unit sits inside the room.
Mini-Split Air Conditioners
Mini-split systems provide a more permanent and efficient solution for homes with jalousie windows. These ductless systems consist of an outdoor compressor connected to one or more indoor air-handling units via a small conduit, eliminating the need for window installation altogether.
The advantages include superior energy efficiency, quiet operation, the ability to cool multiple zones independently, and no interference with the window’s function or appearance. The drawbacks include higher initial cost compared to other options, professional installation requirements, and the permanent nature of the installation, which may not be suitable for rental properties.
Through-the-Wall Air Conditioners
Through-the-wall units offer another alternative that completely bypasses the window. These systems require creating an opening in an exterior wall where the air conditioner will be permanently installed. For homes with jalousie windows, this option preserves the windows’ functionality and aesthetic while providing efficient cooling.
This solution offers better energy efficiency than portable units, permanent installation without affecting windows, and typically quieter operation than window units. The disadvantages include the need for significant home modification, professional installation in most cases, and potential structural considerations depending on the wall construction.
Modified Window Air Conditioner Installation
Some homeowners opt to modify either their jalousie windows or standard window air conditioners to make them compatible. This approach might involve removing several slats, building a custom frame, or creating an adapter panel to accommodate a traditional window unit.
While this can be a cost-effective solution, it often requires carpentry skills and may compromise the window’s original function and appearance. The effectiveness varies widely based on the quality of the modification and the sealing achieved.
Popular Air Conditioner Models for Homes with Jalousie Windows
| Type | Recommended Models | Price Range | BTU Range | Key Features |
|---|---|---|---|---|
| Portable | Whynter ARC-14S, LG LP1419IVSM, BLACK+DECKER BPACT08WT | $300-$700 | 8,000-14,000 | Dual-hose designs, programmable timers, remote controls |
| Mini-Split | Mitsubishi MSZ-GL, Daikin 17 SEER, PIONEER Air Conditioner | $800-$2,500+ | 9,000-36,000 | Inverter technology, multi-zone options, WiFi control |
| Through-Wall | Friedrich Chill CP06G10B, LG LT1016CER, Koldfront WTC8001W | $400-$900 | 6,000-12,000 | Energy-saving modes, programmable settings, sleeve designs |
The Whynter ARC-14S consistently ranks among the best portable options for jalousie window homes, offering 14,000 BTU cooling capacity with a dual-hose system that improves efficiency. For mini-split systems, the Mitsubishi MSZ-GL series provides excellent energy efficiency with SEER ratings up to 24.6, while maintaining a slim profile for the indoor unit.
Installation Considerations for Jalousie Windows
Portable AC Installation
When installing a portable air conditioner with a jalousie window, the exhaust hose requires special consideration to ensure proper ventilation while minimizing air leaks. Start by creating a template for your specific window and cutting a panel from plexiglass or rigid foam insulation board to fit the window opening.
Cut a hole in the panel sized to the exhaust hose adapter, then use weather stripping around the edges of the panel to create a better seal. Position the panel in the window opening, ensuring several jalousie slats are closed against it to help secure it. For additional security, consider using removable adhesive or mounting hardware that won’t permanently damage the window frame.
Creating Custom Adapters
For those attempting to install a window unit in a jalousie window, custom adapters can bridge the gap between the AC unit and the window frame. Measure the window opening carefully, accounting for the space created by removing slats if necessary. Construct a frame using weather-resistant wood or plexiglass that fits securely in the opening.
Use foam insulation tape along all edges to create an airtight seal, and consider adding additional support brackets if the window frame seems insufficient to hold the weight of the unit. Professional installation is recommended for this approach to ensure proper support and sealing.
Energy Efficiency Optimization
Jalousie windows typically offer poor insulation even when closed, making energy efficiency crucial when adding air conditioning. Address air leaks by applying weatherstripping to the window frame and edges of each slat to improve the seal when closed. Consider installing window film on the glass slats to reduce solar heat gain, particularly on windows with direct sun exposure.
When using portable air conditioners, opt for dual-hose models which are more efficient in hot climates than single-hose alternatives. Set your thermostat to an energy-efficient temperature (typically 78°F when home) and use ceiling fans to improve air circulation, allowing you to run the AC at a higher temperature while maintaining comfort.
For long-term efficiency, consider supplementing your cooling system with window treatments like insulating curtains or external shade screens to reduce heat transfer through the jalousie windows. Some homeowners in particularly hot climates choose to install secondary interior windows behind their jalousie windows to improve insulation while preserving the exterior appearance.
Maintenance Tips for Air Conditioners with Jalousie Windows
- Clean or replace air filters monthly during heavy use periods to maintain airflow and efficiency
- Check and clean the condensate drain regularly to prevent water damage and mold growth
- Inspect and reinforce any custom sealing adaptations at the beginning of each cooling season
- Clean the jalousie slats and tracks to ensure proper closure when the AC is operating
- For mini-split systems, have the refrigerant lines and connections professionally inspected annually
- Keep the area around outdoor units clear of debris and vegetation for optimal airflow
- Verify that any temporary installations remain secure, especially after storms or high winds
Cost Considerations and ROI
When evaluating cooling options for homes with jalousie windows, consider both initial and long-term costs. Portable air conditioners offer the lowest entry cost ($300-$700) but typically have higher operating costs due to lower efficiency ratings. Their lifespan averages 5-8 years, resulting in a moderate long-term investment.
Mini-split systems represent a higher initial investment ($1,500-$3,500 installed) but offer significantly better energy efficiency with SEER ratings often exceeding 20. With proper maintenance, these systems can last 15-20 years, providing better long-term value despite the higher purchase price.
Through-wall units fall in the middle range for initial costs ($400-$900 plus installation) with moderate efficiency. When calculating return on investment, factor in the improved comfort, potential home value increase, and energy savings. For homes in hot, humid climates where cooling runs much of the year, the investment in more efficient systems typically pays off faster.
Aesthetic and Practical Considerations
Jalousie windows often contribute significantly to a home’s architectural character, particularly in mid-century or tropical-style residences. When selecting cooling solutions, consider how each option impacts the visual appeal of your home from both interior and exterior perspectives.
Portable units preserve the window’s appearance but occupy floor space and introduce a modern appliance into the room’s aesthetic. Mini-split systems require wall-mounted interior units that may affect room décor, though slim, low-profile designs are available. Through-wall installations permanently alter the exterior appearance but leave windows intact.
From a practical standpoint, also consider how each solution affects the window’s functionality. Jalousie windows provide excellent ventilation during moderate weather, allowing homeowners to reduce AC usage during these periods. Solutions that permanently block or disable the window eliminate this benefit, potentially increasing annual cooling costs.