What To Know
- Apply a bead of silicone caulk around the edges of the AC unit where it meets the window frame.
- Apply a bead of caulk along the top of the AC unit, where it meets the window frame.
- Apply a bead of caulk along the bottom of the AC unit, where it meets the window frame.
Summer is in full swing, and your window air conditioner is working hard to keep you cool. But did you know that a poorly sealed window AC can waste energy and make your home less comfortable?
Why Seal Your Window Air Conditioner?
Sealing your window air conditioner is essential for several reasons:
- Improved energy efficiency: A sealed unit prevents warm air from leaking in and cool air from escaping, reducing energy consumption.
- Increased comfort: A well-sealed AC will cool your room more effectively, providing a more comfortable living space.
- Reduced noise: Air leaks can create whistling or rattling noises, which can be annoying and disruptive.
- Prevention of pests: Gaps around the AC unit can allow insects and rodents to enter your home.
Materials You’ll Need
Before you begin, gather the following materials:
- Caulk gun
- Silicone caulk
- Foam weatherstripping
- Scissors
- Measuring tape
- Dry cloth
Step-by-Step Instructions
1. Prepare the Area
- Clean the area around the AC unit and window frame with a dry cloth to remove any dirt or debris.
- Remove any existing caulk or weatherstripping.
2. Install Foam Weatherstripping
- Measure the length of the window frame where the AC unit will be installed.
- Cut the foam weatherstripping to the appropriate length.
- Peel off the backing and apply the weatherstripping to the window frame, pressing firmly to ensure a good seal.
3. Seal the Sides
- Apply a bead of silicone caulk around the edges of the AC unit where it meets the window frame.
- Smooth the caulk with your finger or a putty knife.
4. Seal the Top
- Apply a bead of caulk along the top of the AC unit, where it meets the window frame.
- Smooth the caulk and ensure it fills any gaps.
5. Seal the Bottom
- Apply a bead of caulk along the bottom of the AC unit, where it meets the window frame.
- Smooth the caulk and press it firmly to ensure a good seal.
6. Allow the Caulk to Dry
- Allow the caulk to dry completely according to the manufacturer’s instructions. This usually takes 24-48 hours.
Additional Tips for Sealing Your Window Air Conditioner
- Use high-quality caulk: Choose a caulk that is specifically designed for sealing windows and doors.
- Caulk both the inside and outside: Seal both the inside and outside of the AC unit to prevent air leaks.
- Check for gaps regularly: Inspect the seal around your AC unit periodically and re-caulk any gaps that may have developed.
Don’t Seal Your Air Conditioner!
In certain situations, it may not be advisable to seal your window air conditioner. These include:
- When the AC unit is not in use: Sealing the unit when it is not in use can trap moisture inside, leading to mold growth.
- When there is a fire hazard: Sealing the AC unit can block airflow, which can be a fire hazard.
What People Want to Know
Q: How often should I seal my window air conditioner?
A: It is recommended to seal your window air conditioner every year or as needed if you notice any gaps or air leaks.
Q: Can I use duct tape to seal my window air conditioner?
A: No, duct tape is not an effective long-term solution for sealing an AC unit. It is not weather-resistant and can deteriorate over time.
Q: What type of caulk should I use to seal my window air conditioner?
A: Use a high-quality silicone caulk that is specifically designed for sealing windows and doors.
