AC window sealing for casement window

Keep the cool air in and the warm air out with our made-to-measure acrylic window seal kit for outward-opening casement windows. Designed to create a secure, airtight seal around your portable air conditioner hose, it helps improve cooling efficiency by reducing the amount of warm outside air that can re-enter your room. Each acrylic / PVC foam panel is precision cut to your exact measurements for a clean, reusable fit that lasts far longer than temporary fabric alternatives.

Every window is different, which is why we manufacture each window seal to order rather than supplying a one-size-fits-all solution. Whether you choose toggle or Velcro installation, you’ll receive everything you need to install your custom acrylic window seal quickly and start enjoying a cooler, more comfortable home.

Below you can see examples of installed window seals on turn-tilt windows.

Which possibility of installation of an acrylic window seal for mobile air conditioning depends on the direction of the rotation of your window and the structural situation at your property. If your window turns outwards, you can use either the mounting method with toggles or Velcro. If your window turns inwards, you can often only use the Velcro mounting method. If you can easily reach the outside of the window, you can also choose to install toggles on the outside. The advantage of this is that you can then always open and close your window without dismantling your acrylic window seal.

Checklist to see whether your window can be fitted with toggles or Velcro.

Tilt-and-turn windows often have protruding hinges. In that case, look carefully at how best to mount the window seal. In a tilted position, there are often hinges sticking out at the bottom of the window. To still be able to fit a window seal, you can order the sheet 1 cm shorter, so that it still fits, or opt for mounting on the outside with toggles.

If your window turns inwards and the outside inaccessible. Then you can only use the mounting method with Velcro. This method is also easier to install and use. If your window is higher or wider than 1.5 metres, the toggle mounting method is the best option. Also, if you want to mount your window seal on the outside of the window, the method with toggles is the best option.

Also consider in your choice, the suitability of the surface you will mount in on. If you doubt the adhesion of the Velcro to your window, then it is better to choose the toggle mounting method.

Because every window seal is made to your exact measurements, accurate measuring is essential for a successful installation. Having helped customers order bespoke acrylic and PVC foam window seals, we’ve found that most fitting issues come down to a handful of common mistakes that are easy to avoid.

Common Measuring Mistakes We See

• Measuring the glass instead of the window frame or opening – Always measure the area where the acrylic panel will sit, not just the visible glass.
• Not accounting for protruding hinges or window stays – These can prevent the panel from sitting flush. If your window has protruding hardware or using the toggle mounting method where appropriate.
• Ordering a hose opening that’s too small – Measure the outside diameter of your portable air conditioner hose and allow 5 mm of clearance for an easier fit.
• Forgetting about window handles – Handles that protrude into the opening can interfere with installation. In some cases, telescopic handles may provide a better solution.
• Rushing the measurements – Double-checking your dimensions before ordering helps ensure your custom-made panel fits correctly the first time.

 Taking a few extra minutes to check these details before ordering can save time during installation and help your portable air conditioner perform as efficiently as possible.

Our made-to-measure acrylic window seal is designed for most outward-opening windows used with portable air conditioners. The most suitable installation method will depend on your window type, frame dimensions and any protruding hinges or window stays.

If you’re unsure whether your window is suitable, our team can help you determine the best installation method before you place your order.

Follow these 4 simple steps and enjoy a cool environment in no time, thanks to the custom-made window seal.

If your installation isn’t quite right, these are usually easy to resolve.

• The Velcro isn’t sticking properly – Clean the frame thoroughly before applying the adhesive tape and ensure the surface is completely dry.
• There’s still warm air entering – Inspect the seal around the edge of the panel. Small gaps can usually be eliminated using insulation tape.

Acrylic window seals offer several advantages over temporary fabric window seals and universal window kits. Because each panel is made to your exact measurements, it creates a more secure fit around your window opening, helping your portable air conditioner work more efficiently while providing a cleaner, longer-lasting solution that can be reused year after year.

An acrylic window seal for a mobile air conditioner is very easy to install, it insulates the room from both hot air and noise from outside. You can easily order the acrylic sheet in any shape and size, including a hole for the drain hose.

• Better insulation for improved cooling – Unlike flexible fabric seals, a rigid acrylic panel creates a more effective barrier around your portable air conditioner hose. This helps reduce the amount of warm outside air entering your room, allowing your air conditioner to cool the space more efficiently.
• Made to fit your window – Every window seal is manufactured to the measurements you provide, creating a cleaner fit than adjustable or one-size-fits-all alternatives. A precise fit also helps minimise unwanted air gaps around the panel.
• Built to last – Manufactured from durable 4 mm acrylic, our window seals are designed to withstand repeated seasonal use. At the end of summer, simply remove the panel, clean it if required and store it ready for next year.
• A cleaner, more practical solution – Unlike temporary fabric window seals that may need replacing after repeated use, acrylic panels provide a neat appearance, are easy to wipe clean and don’t absorb moisture or dust.

You order your custom-made window seal for a mobile air conditioner in these four easy steps: