Come summer, an air conditioner is one of the best ways to escape the scorching heat. However, not everyone can afford an HVAC or casement unit and air conditioners that fit into sliding windows can be tempting. Not only are such air conditioners cheaper than HVACs, they also work just as well in cooling a room. However, the big question is how to install an air conditioner in a sliding window, if that is the type of window you have in the room.
The good news is that you can make a frame and fit such an air conditioner into a sliding window. The frame does not need a brace from outside and is just the answer for people in apartments, who require an air conditioner for just a few months in a year. Making the frame takes about an hour, if you work diligently, but you also need certain tools as well as lumber to make the frame. Once the frame is built, it hardly takes a few minutes to install the air conditioner. Also, after the summer season passes, it is possible to remove the frame and get ready for winter.
The following instructions are meant for installing an air conditioner in a horizontal sliding window. This installation requires two people, so get a close friend or relative to help you out.
Things You’ll Need
- 2X4 lumber pieces
- 12 deck screws or long wood screws
- Measuring tape
- Plywood board
How to Install an Air Conditioner in a Sliding Window
1. Measure the width of the air conditioner. Ensure that vents that are sticking out from the sides are included in the width measurement. Jot down the figure and then measure the height of the air conditioner. Height measurement should include the box height.
2. Measure the height of the window opening. Ensure that during window height measurement, you should take the measurement from right up against the window to get the shortest height.
3. Use the saw to cut three pieces of lumber based on the width of the air conditioner and 2 pieces of lumber based on the height of the lumber.
4. Lay one short lumber that is cut according to the width of the air conditioner on the floor and fix it to the end of the two longer pieces using the screw. Ensure that the corners are perfectly square. Push the fixed rectangular frame into the window to ensure a perfect fit. It should slide in and out easily. If the frame is loose, you will need to use shims during the installation.
5. Fix your air conditioner into the frame and ensure that the bottom lip of the air conditioner is against the outside of the rectangular frame. After this dry-fit, take the last piece of the short lumber and slide it on top of the air conditioner, but do not screw it in as yet. Tip the air conditioner a little back to facilitate drainage. Get your friend or relative to hold the air conditioner securely in the slightly tipped position and only then use a pencil to mark the position on the frame. Remove the air conditioner from the frame and then fix the final short piece of the lumber based on the marking you just made.
6. The top half of the frame needs to be covered using the plywood board you have. Measure the opening carefully, taking note that the board cannot be fixed below the horizontal lumber in the middle. Cut the board accordingly and use screws to fix it to the frame.
7. Open the sliding window and fit the frame into the opening. You can offer additional stability to the frame by fixing it to the window frame using screws. If this is not possible, opt for angle brackets.
8. Once the frame is fixed, slide the air conditioner and secure it by putting in a couple of screws through the lip. Use narrow pieces of foam to fill in any gaps.
9. Ensure that you install a window lock on the sliding window to prevent intruders from gaining entry into your home.
With this, you have just managed to install a window air conditioner in a sliding window successfully.
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