Finding cooling solutions for homes with crank windows (also called casement windows) presents unique challenges. Unlike traditional sliding windows, crank windows open outward and have irregular shapes, making standard portable air conditioner window kits incompatible. This compatibility issue often leaves homeowners wondering if portable AC units are even an option. Fortunately, specialized window kits and installation techniques exist specifically for crank windows. This article explores the challenges, solutions, product options, and installation methods for using portable air conditioners with crank windows, helping you stay cool without requiring permanent modifications to your home.
Crank windows, also known as casement or awning windows, operate by turning a hand crank that pushes the window outward on hinges. While excellent for ventilation, these windows create significant obstacles for portable air conditioner installation because standard window kits are designed for sliding or double-hung windows with rectangular openings.
The primary challenges include the window’s outward swing, the irregular shape when partially open, and the presence of the crank mechanism itself. Additionally, the window frame often features weather stripping and locking mechanisms that can interfere with traditional venting methods.
These obstacles don’t make installation impossible—they simply require specialized solutions. Many homeowners successfully use portable air conditioners with crank windows through proper planning and appropriate equipment.
Types of Portable Air Conditioners for Crank Windows
When selecting a portable air conditioner for a crank window setup, understanding the different types available helps ensure compatibility with your custom installation needs.
Single-Hose vs. Dual-Hose Systems
Single-hose units draw air from the room, cool it, and expel hot air through one exhaust hose. These units are typically more affordable and compact, making them easier to position near crank windows. However, they create negative pressure that can reduce efficiency.
Dual-hose systems use separate hoses for intake and exhaust, maintaining neutral room pressure and offering superior cooling efficiency. These systems are generally more effective but require accommodating two hoses in your window installation solution.
Size and BTU Considerations
| Room Size (sq ft) | Recommended BTU | Cooling Capacity |
|---|---|---|
| 150-250 | 6,000-8,000 | Light cooling for small rooms |
| 250-400 | 8,000-12,000 | Medium cooling for bedrooms |
| 400-600 | 12,000-14,000 | Strong cooling for living spaces |
| 600+ | 14,000+ | Powerful cooling for large areas |
Selecting the appropriate BTU rating is crucial for efficiency. An undersized unit will run continuously without adequately cooling, while an oversized unit will cycle on and off frequently, increasing energy consumption and reducing dehumidification effectiveness.
Specialized Window Kits for Crank Windows
Several manufacturers now offer specialized window kits designed specifically for crank and casement windows. These kits provide reliable solutions without requiring extensive DIY modifications.
Commercial Window Kit Options
- Adjustable Casement Window Kits – Feature flexible panels that can be custom-fit to various window dimensions
- Sliding Adaptors – Allow standard kits to work with crank windows by creating a flat, sealed surface
- Fabric-based Solutions – Use heavy-duty zipper systems to create a sealed opening for hoses
- Magnetic Seal Kits – Employ magnetic strips to attach to metal window frames for a secure, temporary seal
When purchasing a kit, verify measurements carefully. Most quality kits range from $30-$100 depending on materials and adjustability features. Universal kits offering multiple configuration options typically provide the best value for unusual window shapes.
DIY Installation Solutions for Crank Windows
Many homeowners create custom solutions when commercial kits don’t fit their specific window configuration. These DIY approaches can be cost-effective while providing excellent results.
Plexiglass or Acrylic Panel Method
This popular approach involves creating a custom-sized clear panel that replaces the window kit. Plexiglass can be cut precisely to your window dimensions and modified with holes for exhaust hoses. The panel installs against the window frame with weatherstripping to ensure a proper seal.
Materials needed include:
- 1/4″ or 1/8″ plexiglass sheet (sized to your window)
- Weatherstripping tape
- Hole saw (sized to your exhaust hose)
- Measuring tape and marker
Foam Board Installation
For a less expensive alternative, foam insulation boards provide excellent insulation and are easy to work with. This approach works well for temporary installations and rental properties where minimal modification is required.
The foam can be secured using tension rods or removable adhesive strips that won’t damage window frames. Some homeowners cover the exterior-facing side with reflective material to reduce heat absorption.
Top Recommended Portable AC Models for Crank Windows
These portable air conditioners offer features that make them particularly well-suited for crank window installations, including flexible hoses, adaptable venting options, and efficient cooling performance.
| Model | BTU | Hose Type | Special Features | Price Range |
|---|---|---|---|---|
| Whynter ARC-14S | 14,000 | Dual-hose | Includes versatile window kit, energy efficient | $450-$550 |
| LG LP1419IVSM | 14,000 | Single-hose | Inverter technology, quiet operation | $600-$700 |
| BLACK+DECKER BPACT10WT | 10,000 | Single-hose | Compact size, good for smaller windows | $300-$380 |
| SereneLife SLPAC10 | 10,000 | Single-hose | Ultra-flexible hose, easier adaptation | $300-$350 |
| De’Longhi Pinguino PACEX390LVYN | 14,000 | Single-hose | Adaptor-friendly design, silent mode | $500-$650 |
The Whynter ARC-14S stands out for crank window applications due to its dual-hose design that maximizes efficiency and its window kit that can be more easily modified for irregular openings. For smaller spaces, the BLACK+DECKER model offers excellent value with a flexible exhaust hose that adapts well to custom installations.
Step-by-Step Installation Guide
Following these steps will help ensure a successful installation of your portable air conditioner in a crank window.
Preparation and Measurement
- Measure your window opening precisely, including width, height, and depth of the frame
- Determine whether the window opens from the left or right side for optimal hose positioning
- Choose your installation method (commercial kit or DIY solution)
- Gather all necessary tools and materials before beginning
Basic Installation Process
- Close the window completely and clean the frame to ensure good adhesion for sealing materials
- Install your panel (commercial or DIY) into the window frame, ensuring it fits snugly
- Apply weatherstripping around the edges to create an airtight seal
- Cut precise holes for the exhaust hose(s) using appropriate tools
- Connect the portable AC unit’s hose(s) to the panel
- Secure any loose components with tape or brackets as needed
- Test the installation by running the unit and checking for air leaks
For maximum efficiency, position the portable AC unit as close to the window as possible to minimize the length of hose exposed to room temperature. This reduces heat transfer back into the room through the hose.
Improving Efficiency and Performance
Once installed, several strategies can help maximize the cooling performance of your portable air conditioner with a crank window setup.
Sealing and Insulation Tips
Proper sealing is critical for efficiency in crank window installations. Use foam tape or rope caulk to fill any gaps around your installation panel. For temporary installations that need frequent removal, magnetic strips or hook-and-loop fasteners can maintain a seal while allowing easy access.
Consider insulating the exhaust hose itself using foam pipe insulation or specialized hose covers. This prevents heat from the hose from radiating back into the room, improving overall efficiency by up to 25%.
Positioning and Maintenance
- Place the unit away from heat sources and direct sunlight
- Ensure adequate clearance (typically 20 inches) around the air intake
- Clean filters regularly, typically every 2-4 weeks during heavy use
- Check and tighten hose connections monthly to prevent air leaks
- Empty the condensate collection tank as needed, or set up continuous drainage
Some users report significant performance improvements by adding reflective material to the outside of their window panel, which reduces heat gain through the installation area, particularly important for south or west-facing windows.
Addressing Common Issues and Troubleshooting
Even with careful installation, users may encounter certain challenges when using portable air conditioners with crank windows.
Air Leakage Problems
If you notice warm air infiltrating around your installation, first identify the exact location of leaks. Use the candle test by slowly moving a lit candle around the edges of your installation—flickering indicates air movement. Address leaks with additional weatherstripping or specialized AC sealant tape.
For persistent leakage issues, consider creating a secondary seal using a heavy curtain or thermal barrier that covers both the window and the AC panel installation.
Condensation Management
Excessive condensation can occur in high-humidity environments. Most modern portable ACs have self-evaporative technology, but supplementary solutions include:
- Setting up continuous drainage using a hose directed to a floor drain
- Using condensate collection pads to absorb excess moisture
- Running a dehumidifier in conjunction with the AC unit
- Applying anti-condensation coating to exposed metal parts
Proper gradient positioning of drain hoses ensures gravity flow and prevents water backup issues that can reduce efficiency or damage the unit.
Seasonal Considerations and Storage
Portable air conditioners require different maintenance approaches depending on the season and usage patterns.
End-of-Season Care
When cooling season ends, proper storage ensures your unit remains in excellent condition for next year:
- Run the unit in fan-only mode for 2-3 hours to dry internal components
- Clean all filters thoroughly and allow to dry completely
- Empty and clean the condensate collection system
- Carefully remove the window installation, clean sealing surfaces
- Store the AC unit upright in a dry location, covered to prevent dust accumulation
- Keep window kit components together in a labeled container
Take photos of your installation before disassembly to remember the exact configuration for next season, especially important for custom setups.
Year-Round Use Considerations
Some portable AC units offer heating functionality, making them useful year-round. If using the same crank window installation during colder months, consider adding extra insulation around the panel and hoses to prevent heat loss.
For units with heating capabilities, reversing the airflow direction may require reconfiguring your window installation. Many dual-function units include specific instructions for seasonal transitions that should be followed carefully.