Crank windows, also known as casement windows, present unique challenges when installing portable air conditioners. Their side-hinged design differs significantly from traditional sliding windows, making standard AC window kits ineffective. However, with the right unit and proper installation techniques, it’s entirely possible to cool rooms with these distinctive windows. This article explores specialized portable air conditioners and installation solutions designed specifically for crank windows, helping homeowners achieve efficient cooling without compromising window functionality or home security.
Crank windows open outward using a hand crank mechanism, creating an entirely different configuration than sliding or double-hung windows. The primary challenges when installing portable air conditioners include:
- The window opens outward rather than sliding up, making standard window kits incompatible
- The crank handle often protrudes, creating gaps in seal attempts
- Many crank windows have screens that complicate installation
- The opening mechanism doesn’t provide a flat surface for mounting standard brackets
These structural characteristics make it difficult to create a proper seal for the exhaust hose of a portable air conditioner. Without proper sealing, hot air can re-enter the room, significantly reducing cooling efficiency and increasing energy costs.
Best Portable Air Conditioners for Crank Windows
When selecting a portable AC unit for crank windows, look for models with flexible installation options and adaptable window kits. The following units are particularly well-suited for crank window installations:
| Model | BTU Rating | Room Size | Special Features | Price Range |
|---|---|---|---|---|
| Whynter Elite ARC-122DS | 12,000 BTU | Up to 400 sq. ft. | Dual hose system, easily adaptable kit | $450-$550 |
| De’Longhi Pinguino PACEL290HLWKC | 14,000 BTU | Up to 500 sq. ft. | Versatile hose connection, specialized casement kit available | $650-$750 |
| LG LP1419IVSM | 14,000 BTU | Up to 500 sq. ft. | Inverter technology, adaptable exhaust system | $600-$700 |
| Honeywell MN12CES | 12,000 BTU | Up to 450 sq. ft. | Flexible mounting options, thermal overload protection | $400-$500 |
| Black+Decker BPACT14WT | 14,000 BTU | Up to 350 sq. ft. | Slide-out filter, vertical window kit adaptable for casements | $380-$450 |
The Whynter Elite ARC-122DS and De’Longhi models are particularly recommended as they often include more versatile window kit components that can be adapted for unusual window configurations. The dual-hose Whynter system also offers better cooling efficiency, which is helpful when dealing with the slight inefficiencies of crank window installations.
Specialized Window Kits for Crank Windows
Several manufacturers now offer specialized casement window kits designed specifically for crank windows:
- Casement Window AC Adapters: These kits typically include an adjustable plexiglass panel with a hole for the AC exhaust hose
- Universal Casement Kits: Designed to fit multiple window sizes with expandable panels and versatile mounting hardware
- Foam Board Kits: Pre-cut or customizable insulation boards with exhaust hose openings
Popular casement kits include the AC Safe AC-Safe AC-160 Universal Casement Window Kit and the Forestchill Casement Window Kit, ranging from $40-$90 depending on quality and features. These kits provide proper sealing and support for the portable AC’s exhaust system.
DIY Installation Solutions
Creating a Custom Plexiglass Panel
Many homeowners opt for a DIY approach using plexiglass cut to the exact dimensions of their crank window:
- Measure your window opening precisely (height and width)
- Purchase a sheet of plexiglass (available at hardware stores)
- Cut the plexiglass to fit your window dimensions
- Drill a hole sized to your AC’s exhaust hose (typically 5-6 inches)
- Add weatherstripping around the edges for a tight seal
- Secure the panel using removable fasteners or strong tape
This custom solution typically costs $30-$50 in materials and provides an excellent fit specific to your window. The transparent material also maintains some visibility and light transmission.
Fabric Window Seal Kits
Another effective option is using adjustable fabric window seal kits like the HOOMEE Universal Window Seal or Gulrear Window Seal. These zippered fabric panels create a flexible seal around the exhaust hose while adapting to various window shapes. They typically cost $20-$40 and are appreciated for their ease of installation and removal.
Professional Installation Options
For those seeking a permanent or semi-permanent solution, professional installation might be worthwhile:
- Custom Window Panels: HVAC professionals can create and install custom-fitted panels specifically designed for your crank windows ($150-$300)
- Partial Window Replacement: Installing a small sliding section within the existing window frame that accommodates a standard AC kit ($300-$600)
- Through-Wall Installation: Creating a dedicated opening for the exhaust hose that bypasses the window entirely ($200-$500 depending on wall construction)
Professional solutions typically offer better energy efficiency and aesthetic appearance, though at a higher cost. They’re particularly valuable for homeowners planning to use portable air conditioning regularly for multiple seasons.
Step-by-Step Installation Guide
Once you’ve chosen your portable AC unit and window adaptation method, follow these steps for installation:
- Preparation: Clean the window frame thoroughly and ensure the crank mechanism works properly
- Window Kit Modification: Adjust your standard kit or prepare your casement window solution
- Temporary Removal: Remove the window screen if necessary (store it safely)
- Panel Installation: Install your plexiglass panel, fabric seal, or specialized casement kit
- Sealing: Apply weatherstripping or foam tape around all edges
- Exhaust Connection: Connect the AC’s exhaust hose to the panel opening
- Security: Secure the panel with appropriate fasteners that won’t damage the window frame
- Final Inspection: Check for air leaks and make adjustments as needed
Always ensure the installation doesn’t permanently modify your window or violate rental agreements if you’re a tenant. Most solutions can be completely removed without leaving damage when no longer needed.
Optimizing Performance
To maximize the efficiency of portable air conditioners in crank windows:
- Double-seal exposed areas with additional weatherstripping
- Keep exhaust hoses as short and straight as possible to improve airflow
- Insulate exposed portions of the exhaust hose with reflective wrap to prevent heat transfer
- Position the AC unit away from direct sunlight and heat sources
- Regularly check and maintain seals throughout the cooling season
Proper installation and maintenance can significantly improve cooling performance, with users reporting up to 30% better efficiency compared to poorly sealed installations.
Alternative Cooling Solutions for Homes with Crank Windows
If portable AC installation proves too challenging, consider these alternatives:
| Cooling Solution | Installation Complexity | Cost Range | Efficiency |
|---|---|---|---|
| Ductless Mini-Split System | Professional installation required | $1,500-$4,000 | Very high |
| Through-Wall AC Unit | Moderate to complex | $400-$1,000 | High |
| Evaporative Cooler | None (freestanding) | $100-$500 | Moderate (humidity-dependent) |
| Dual-Hose Portable AC (with proper sealing) | Moderate | $400-$700 | Moderate |
| High-Velocity Floor Fans | None | $50-$200 | Low (air circulation only) |
Ductless mini-split systems offer the most efficient cooling solution for homes with challenging windows, though at a higher upfront cost. These systems require only a small hole in the wall and don’t interfere with windows at all.
Seasonal Considerations
One advantage of portable ACs with properly designed crank window installations is the ability to easily install and remove them seasonally:
- Spring Installation: Set up before the first heat wave, ensuring all seals are intact
- Summer Maintenance: Clean filters monthly and check window seals for deterioration
- Fall Removal: Remove the installation before cold weather, clean thoroughly, and store properly
- Winter Storage: Store the unit and installation materials in a clean, dry place
Many users find that well-designed crank window solutions can be reinstalled in under 30 minutes after the first setup, making seasonal transitions simple and cost-effective.
Common Problems and Solutions
Even with careful installation, some issues may arise:
| Problem | Possible Cause | Solution |
|---|---|---|
| Air leaks around panel | Insufficient weatherstripping | Add additional foam tape or seal with removable caulk |
| Condensation buildup | Poor sealing allowing humid air entry | Improve exterior seals and ensure proper drainage |
| Exhaust hose disconnection | Inadequate support for hose weight | Add bracket support under the hose or shorten the hose length |
| Noise from vibration | Panel not securely fastened | Add rubber dampeners between panel and frame |
| Poor cooling performance | Exhaust air recirculation | Check all seals and ensure proper directional venting outside |
Most issues can be resolved with additional sealing materials and minor adjustments to the installation. Keep extra weatherstripping and fasteners on hand for quick repairs as needed.
Security Considerations
When installing any temporary window solution, consider these security aspects:
- Ensure the installation cannot be easily removed from outside
- Use additional window locks if the crank lock is obstructed
- Consider installing a window alarm for ground-floor installations
- Avoid solutions that prevent emergency exit if the window serves as a fire escape
Many custom plexiglass solutions can be designed with security screws or interior locking mechanisms that maintain home security while accommodating the portable air conditioner.