How to Install a Portable Air Conditioner in a Push Out Window: A Definitive Guide

Installing a portable air conditioner in a push out window requires a bit of ingenuity and careful adaptation, but it’s entirely achievable. The key lies in creating a secure, airtight seal that both allows the AC unit’s exhaust hose to vent outside and prevents hot air from entering your home. This guide will walk you through the process step-by-step, ensuring a comfortable and energy-efficient cooling solution.

Understanding the Challenges of Push Out Windows

Push out windows, also known as awning windows, present a unique challenge for portable air conditioner installation because they swing outwards from the bottom. Unlike sliding windows where a standard window kit can easily fit, a push out window requires a custom solution to properly seal the opening created by the exhaust hose. The primary concern is preventing air leakage, which can significantly reduce the effectiveness of your AC unit and increase your energy bills. The focus should be on a flexible and adaptable seal that accommodates the window’s movement while maintaining airtight integrity.

Gathering Your Supplies

Before you begin, gather the necessary materials. Having everything readily available will streamline the installation process. You’ll need:

• Portable Air Conditioner unit with exhaust hose and window adapter.
• Insulation foam board or sheet. Choose a thickness suitable for your window opening.
• Measuring tape
• Utility knife or saw for cutting the foam board
• Duct tape (heavy-duty aluminum foil tape is best for durability)
• Weather stripping (foam or rubber)
• Pencil or marker
• Safety glasses and gloves (recommended)
• Possibly clamps or temporary supports (optional)

Step-by-Step Installation Process

1. Measure Your Window Opening

Accurately measure the width and height of the open portion of your push out window where you plan to install the exhaust hose adapter. This measurement is crucial for cutting the foam board to the correct size.

2. Cut the Insulation Foam Board

Carefully cut the insulation foam board to match the dimensions you measured in Step 1. You may need to cut multiple pieces to fit the opening snugly. It’s better to err on the side of being slightly larger than smaller, as you can always trim the board down for a perfect fit.

3. Create an Opening for the Exhaust Hose

Determine the placement of the exhaust hose adapter on the foam board. Use the adapter as a template to trace the outline of the opening onto the board. Then, carefully cut out the opening using a utility knife or saw. Ensure the adapter fits snugly but not too tightly.

4. Install the Exhaust Hose Adapter

Insert the exhaust hose adapter into the opening you created. Secure it to the foam board using duct tape, ensuring a tight seal to prevent air leakage. Apply multiple layers of tape for added security.

5. Position the Foam Board in the Window Opening

Carefully place the foam board assembly into the open portion of the push out window. Ensure it fits snugly and covers the entire opening. You may need to use clamps or temporary supports to hold the board in place while you secure it.

6. Seal Any Gaps with Weather Stripping

Apply weather stripping around the edges of the foam board where it meets the window frame. This will help to create a more airtight seal and prevent drafts. Pay particular attention to the top and bottom edges, as these are common areas for air leakage.

7. Secure the Foam Board with Duct Tape

Use duct tape to further secure the foam board to the window frame. Apply tape along all edges, both inside and outside, creating a strong and durable seal. Make sure the tape overlaps both the foam board and the window frame to create a seamless connection.

8. Connect the Exhaust Hose

Attach the exhaust hose to the adapter on the foam board and to the portable air conditioner unit. Ensure the hose is securely connected and that there are no kinks or bends that could restrict airflow.

9. Test the Installation

Turn on the portable air conditioner and check for any air leaks around the foam board and the exhaust hose. If you detect any leaks, apply additional weather stripping or duct tape to seal them. Monitor the performance of the AC unit to ensure it is cooling effectively.

10. Consider a Fabric Seal (Optional)

For added insulation and to further prevent air leakage, consider using a fabric window seal designed for portable air conditioners. These seals typically attach to the window frame with Velcro and have a zippered opening for the exhaust hose. They provide an extra layer of protection against drafts and can improve the overall energy efficiency of your installation.

Frequently Asked Questions (FAQs)

1. Can I use cardboard instead of insulation foam board?

While cardboard might seem like a cheap and readily available option, it’s not recommended. Cardboard is less durable, provides minimal insulation, and is prone to moisture damage. Insulation foam board is a much better choice because it’s rigid, provides excellent insulation, and is water-resistant.

2. What type of duct tape should I use?

Heavy-duty aluminum foil tape is the best option for securing the foam board and sealing gaps. It’s durable, weather-resistant, and provides a strong, airtight seal. Standard duct tape can degrade over time, especially in humid conditions, leading to air leaks.

3. How do I prevent the foam board from falling out of the window?

Use clamps or temporary supports to hold the foam board in place while you’re securing it with duct tape and weather stripping. Ensure the board fits snugly in the window opening, and apply multiple layers of duct tape for added stability.

4. What if my window is an odd shape or size?

If your window is an unusual shape or size, you may need to create a custom template for cutting the foam board. Use cardboard to create a mock-up of the window opening, then transfer the template to the foam board. Consider using multiple pieces of foam board to create a more complex shape.

5. How often should I check for air leaks?

It’s a good idea to check for air leaks periodically, especially after extreme weather conditions. Run your hand along the edges of the foam board and around the exhaust hose connection to feel for any drafts. Seal any leaks immediately to maintain optimal cooling efficiency.

6. Can I use this method for other types of windows?

While this method is specifically tailored for push out windows, the principles of creating a secure, airtight seal can be applied to other types of windows as well. However, the specific materials and techniques may need to be adapted to suit the window’s design.

7. Is it safe to leave the AC unit running unattended?

It’s generally safe to leave a portable air conditioner running unattended, but it’s important to follow the manufacturer’s safety guidelines. Ensure the unit is properly grounded and that the exhaust hose is securely vented outside. Also, regularly clean the filter to prevent overheating and maintain optimal performance.

8. How do I clean the exhaust hose?

The exhaust hose typically doesn’t require regular cleaning. However, if you notice a buildup of dust or debris, you can disconnect the hose and vacuum it out. Avoid using water or harsh chemicals, as these could damage the hose.

9. Can I reuse the foam board installation next year?

Yes, if you carefully remove the foam board installation and store it in a dry place, you can reuse it next year. However, you may need to replace the weather stripping and duct tape, as these materials can degrade over time.

10. What if the exhaust hose is too short?

If the exhaust hose is too short to reach the window, you can purchase an extension hose. Ensure the extension hose is compatible with your portable air conditioner unit and that it’s securely connected to prevent air leaks.

11. Will this affect my window’s warranty?

Installing a portable air conditioner in a push out window may void the window’s warranty if you make any permanent modifications to the window frame. Check the terms of your warranty before proceeding with the installation.

12. How do I improve the overall efficiency of my portable AC unit?

To improve the efficiency of your portable AC unit, ensure the room is well-insulated, close curtains or blinds during the day to block sunlight, and keep the filter clean. Also, choose an AC unit that is appropriately sized for the room you’re cooling.