Getting a portable air conditioner is a fantastic way to beat the summer heat without the hassle of a permanent installation. But if you have crank-out windows – those lovely casement, awning, or jalousie styles – you know the standard window kits just won’t cut it. And if you’re working with plexiglass, you definitely want a solution that’s non-invasive and easy on the material. That’s where a specialized air conditioner exhaust kit for crank out windows comes into play. You’re likely searching for the best air conditioner ls kit for crank out windows plexiglass, which refers to these flexible, non-drilling seals designed to work with challenging window types.
Traditional AC window kits are typically rigid panels meant for vertical or horizontal sliding windows. For crank-out windows, you need something adaptable that can seal the gap created by the partially open window while allowing your portable AC’s exhaust hose to vent hot air outside. The good news? There are excellent solutions out there that are easy to install, prevent hot air from re-entering your space, and help keep your room cool and comfortable. We’ve rounded up five top contenders that are perfect for tackling this common AC dilemma, whether your windows are glass or plexiglass.
Let’s dive into the reviews of the best options available to help you find the perfect fit for your home.
1. HOOMEE 400CM (157″) Universal Window Seal for Portable Air Conditioners

The HOOMEE Universal Window Seal is a go-to choice for many when it comes to sealing crank-out windows for a portable AC. What makes it stand out is its straightforward, no-fuss design combined with its impressive sealing capability. It creates a “closed environment” that not only keeps the warm air from your AC’s exhaust hose out but also prevents unwanted guests like bugs and rain from getting in. This simple yet effective solution is designed to boost your AC’s efficiency, making your space cooler, faster, and without the need for any drilling.
Key Features:
– No More Hot Air Incomes: Effectively seals the gap between your window and frame, locking the hot air from your AC hose out.
– Increases Cooling Performance: Prevents warm air re-entry, allowing your portable AC to operate more efficiently.
– Reduces Energy Consumption: By improving AC efficiency, it helps lower your electricity bills and carbon footprint.
– Easy to Install: Simply apply adhesive hook tape, attach the seal, zip around the hose – no drilling or extra tools needed.
– Universal Fit: Suitable for all portable air conditioners and tumble dryers, accommodating various window types (left/right opening, bottom-hung, skylights) with a perimeter up to 400 CM (157″).
Pros:
– Very easy and quick installation process.
– Significantly improves portable AC efficiency.
– Universal design fits most window types and AC hoses.
– Helps save on energy costs.
– Keeps out bugs and rain.
Cons:
– Adhesive tape might need occasional reapplication in humid conditions.
– Aesthetics might not suit everyone’s taste.
– Can be a bit fiddly to get a perfect seal initially.
User Impressions:
Users frequently praise the HOOMEE seal for its simplicity and effectiveness, especially for windows where traditional kits fail. Many appreciate how quickly it transforms a previously impossible venting situation into a fully functional one, making their portable ACs viable. Some mentioned needing to reinforce the adhesive over time, but generally, the consensus is that it’s a solid, affordable solution.
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2. Loviga 400CM (157″) Portable AC Window Seal, Casement Window AC Kit

The Loviga 400CM Portable AC Window Seal takes a thoughtful approach to sealing, particularly for those tricky casement and crank-out windows. Its innovative drawstring design is a standout feature, allowing for a 100% sealing effect around your AC hose without needing extra adapters. Loviga has focused on improving reliability and simplifying installation, addressing common frustrations with other zipper-type seals. This solution ensures cool air stays in and hot air, rain, and bugs stay out, making your portable AC a true asset in warmer weather.
Key Features:
– Universal Compatibility: Works with skylights, awning, casement, or crank-out windows (left/right opening) with a perimeter under 400cm/157″ (except sliding/hung windows).
– 100% Sealing Effect: Innovative drawstring structure snugly fits 4.9″~5.9″ hoses, creating a “0” gap seal.
– More Reliable Design: Avoids issues like zipper bursting or poor sealing found in older designs, using solid materials and widened Velcro for enhanced adhesion.
– Easier Installation: No drilling, window kits, hose adapters, or additional tools required; just paste Velcro, attach fabric, and tighten the drawstring.
– Dual Hose Option: Includes a section of zipper opening for potential multiple or different sized hoses.
Pros:
– Drawstring design provides a superior, gap-free seal.
– Enhanced materials and construction for durability.
– Very easy and tool-free installation.
– Effectively blocks heat, rain, and insects.
– Versatile for many non-sliding window types.
Cons:
– Careful measurement is crucial for optimal fit.
– Might require a bit of patience to get the drawstring perfectly tight.
– Not suitable for sliding or hung windows.
User Impressions:
Customers love the Loviga seal’s improved design, especially the drawstring, which they say creates a much better seal than zipper-only versions. The enhanced Velcro and overall material quality also get high marks for durability. Users found the installation straightforward, and many reported a noticeable improvement in their AC’s cooling performance.
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3. SPONDWILD 157″/400CM Portable AC Window Seal Kit – Air Conditioner Exhaust Kit

The SPONDWILD Portable AC Window Seal Kit is another excellent option designed specifically for those challenging casement and crank-out windows. It boasts a pull-rope design, similar to the Loviga, which ensures a snug, gap-free fit around your AC hose, optimizing cooling performance. What truly sets the SPONDWILD apart is its focus on enhanced adhesion and high-quality, UV-proof waterproof fabric, promising long-lasting durability even in harsh weather. This kit is a robust choice for anyone seeking the best air conditioner ls kit for crank out windows plexiglass that will stand the test of time.
Key Features:
– Applicable Windows: Suitable for all inward-opening or outward-opening windows, including skylights, awning, and casement windows (except sliding/hanging windows), with perimeter smaller than 400cm/157″.
– Pull Rope Design: Creates a close, gap-free fit around the AC hose, effectively blocking heat, rain, and other outdoor elements.
– Enhanced Adhesion: Improved back adhesive and tape materials for stronger, more reliable sealing performance.
– High-Quality Fabric: Made from durable, waterproof, and UV-proof fabric for long-lasting use in various weather conditions.
– Easy Installation: Tool-free and drill-free installation; just clean the frame, stick adhesive, attach the strip, and pull it onto the exhaust hose.
Pros:
– Superior pull-rope sealing mechanism.
– Highly durable, waterproof, and UV-proof fabric.
– Stronger adhesive for better long-term hold.
– Prevents hot air, rain, and insects from entering.
– Simple and quick installation.
Cons:
– The adhesive might still require a clean surface for best adhesion.
– Not suitable for sliding window types.
– Only available in one size (157″/400CM).
User Impressions:
Users frequently comment on the SPONDWILD’s robust build quality and the effectiveness of its pull-rope design for a tight seal. The enhanced adhesive is a definite plus, with many reporting a more secure fit compared to other brands. Its durability against weather elements is also a common highlight, making it a reliable choice for extended summer use.
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4. YAHENLI 300CM (118″) Portable AC Window Seal, Casement Window Air Conditioner Exhaust Kit

The YAHENLI Portable AC Window Seal offers a compact and efficient solution for venting your portable AC through crank-out windows. While it shares many great features with its larger counterparts, its 300CM (118″) perimeter makes it ideal for smaller windows or more confined spaces. It excels at creating an excellent sealing effect, trapping cool air indoors and expelling hot air outside. What makes the YAHENLI stand out is its commitment to waterproof materials and the convenience of being able to open or close your window without removing the seal – a handy feature for natural ventilation when the AC isn’t running.
Key Features:
– Excellent Sealing Effect: Effectively keeps hot air out and cool air in, enhancing AC performance.
– Universal Fit: Compatible with casement, skylights, awning, or crank-out windows (left/right opening) up to 118 inches perimeter (except sliding/hung windows).
– Waterproof Material: Made of waterproof polyester and PU, allowing use even on rainy days.
– Easier Installation: No drilling or tools needed; simply apply Velcro, attach the seal, and zip around the hose.
– Convenient Operation: Allows you to open or close the window at any time without removing the seal.
Pros:
– Ideal for smaller crank-out windows with its 118″ perimeter.
– Waterproof design is great for all-weather use.
– Ability to open/close window without seal removal is a significant convenience.
– Easy, tool-free installation.
– Effective at preventing hot air re-entry.
Cons:
– Slightly smaller perimeter might not fit larger windows.
– Uses a zipper seal, which some users find less robust than drawstring designs.
– Velcro adhesion might vary depending on window frame material.
User Impressions:
Users appreciate the YAHENLI for its waterproof capabilities and the practical ability to operate their window without disassembling the seal. It’s often recommended for smaller casement windows where a larger seal would be overkill. The installation is generally found to be straightforward, and most report good sealing performance, keeping their rooms comfortable.
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5. Loviga 500CM (196″) Portable AC Window Seal, Casement Window AC Kit (Large)

For those with larger crank-out windows, the Loviga 500CM Portable AC Window Seal is the ultimate solution. This larger version of the popular Loviga seal retains all the innovative features of its smaller sibling but expands its perimeter capacity to a generous 500cm (196 inches). It’s designed to provide the same 100% sealing effect with its superior drawstring design, ensuring your portable AC operates at peak efficiency. If you’ve been struggling to find an air conditioner exhaust kit for crank out windows that can handle a substantial opening, this robust and reliable option could be the best air conditioner ls kit for crank out windows plexiglass for you.
Key Features:
– Extended Universal Compatibility: Perfect for larger skylights, awning, casement, or crank-out windows (left/right opening) with a perimeter under 500cm/196″ (except sliding/hung windows).
– 100% Sealing Effect: Patented drawstring structure provides a snug, “0” gap fit around 4.9″~5.9″ hoses.
– More Reliable Design: Upgraded materials, double-stitching, and widened Velcro/tape enhance adhesion and sealing, preventing common issues like zipper failure.
– Easier Installation: Drill-free and tool-free setup; simply apply Velcro, attach fabric, and tighten the drawstring.
– Multi-Hose Capability: Features an opening to accommodate multiple or different sized hoses if needed.
Pros:
– Accommodates very large crank-out windows.
– Excellent drawstring design for a tight, gap-free seal.
– Highly durable materials and construction for reliability.
– Easy, no-tools installation.
– Effectively blocks heat, rain, and insects.
Cons:
– Might be overkill for smaller windows, leading to excess fabric.
– Premium price point due to size and robust features.
– Still not compatible with sliding or hung windows.
User Impressions:
Reviewers with oversized or unusually shaped crank-out windows rave about the Loviga 500CM, saying it’s the only seal that truly fit their needs. The consistent praise for the drawstring sealing method and overall build quality applies equally to this larger version. Customers find it makes their portable AC units incredibly effective, even in expansive rooms with large window openings.
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FAQ Section
Q1: What exactly is an “air conditioner ls kit for crank out windows plexiglass”?
A1: While the term “LS kit” is a bit of a misnomer (it’s often associated with engine swaps), in the context of portable air conditioners, it refers to specialized flexible window seals designed to exhaust hot air from a portable AC unit. These kits are specifically made for “crank out windows” (like casement or awning windows) where traditional rigid AC window panels won’t work. They are also gentle on materials like “plexiglass” because they involve no drilling or permanent modifications.
Q2: How do these flexible window seals work with crank-out windows?
A2: These seals typically consist of a flexible fabric membrane that attaches to your window frame and the window itself using adhesive Velcro tape. Once installed, you open a zipper or drawstring opening in the fabric, feed your portable AC’s exhaust hose through it, and then tighten the seal around the hose. This creates a closed system, allowing the hot air to escape while keeping cool air inside your room.
Q3: Can I install these kits on my own without tools or drilling?
A3: Absolutely! One of the biggest advantages of these portable AC window seals is their easy, DIY-friendly installation. They usually come with everything you need, including adhesive Velcro tape. No drilling, cutting, or specialized tools are required, making them perfect for renters or anyone who wants a temporary, non-damaging solution.
Q4: Will these seals really keep the hot air out and improve my AC’s efficiency?
A4: Yes, effectively. By sealing the gap around your partially open crank-out window and the exhaust hose, these kits prevent the hot air from the AC’s exhaust from recirculating back into your room. This significantly improves your portable AC’s cooling performance and energy efficiency, helping you save on electricity bills.
Q5: Are these window seals waterproof? Can I use them on rainy days?
A5: Many high-quality portable AC window seals, like some reviewed here, are indeed made from waterproof or water-resistant materials (e.g., polyester and PU). This means you can generally leave them installed and use your portable AC even during light rain without worrying about water ingress. Always check the specific product features for waterproof claims.
Q6: What types of windows are compatible with these kits?
A6: These kits are designed for various types of crank-out windows, including casement windows (which typically open outwards like a door), awning windows (which hinge at the top and open outwards), and skylights. They are generally not suitable for sliding windows (horizontal or vertical sliders) or hung windows, as those require different types of rigid or flexible panels.
Q7: How do I know what size window seal I need?
A7: You need to measure the perimeter of your window where the seal will be applied. This usually involves measuring all four sides of the window frame where the adhesive tape will go. Compare your measurement to the maximum perimeter capacity listed for each product (e.g., 300CM, 400CM, 500CM). It’s always better to go slightly larger if you’re between sizes.
Conclusion
Finding the right solution for venting your portable air conditioner through crank-out windows can seem tricky, especially when you’re looking for the best air conditioner ls kit for crank out windows plexiglass that protects your window materials. Thankfully, these flexible window seals offer an ingenious, non-invasive, and highly effective way to keep your space cool.
Whether you have a small casement window or a large awning style, or even a sensitive plexiglass pane, there’s a window seal kit designed to meet your needs. We’ve highlighted five top contenders that boast easy installation, excellent sealing capabilities, and durable construction, ensuring your portable AC performs optimally without letting the heat back in. Choose the one that best fits your window’s dimensions and enjoy a comfortably cool summer!


