Yes, tilting a window air conditioner is essential for proper functioning and to prevent potential issues. Window air conditioners are designed with a condensate drain or drip pan to collect the moisture that is removed from the air during the cooling process. If the unit is not tilted correctly, this water can build up inside the unit, leading to problems like:
Reduced cooling efficiency: The water buildup can interfere with the proper operation of the air conditioner, reducing its cooling capacity and overall efficiency.
Water leakage: If the water cannot drain properly, it may leak inside your home, causing damage to the window sill or the surrounding area.
To avoid these issues, you should tilt the window air conditioner slightly backward when installing it. The recommended tilt is usually around 1/4 inch to 1/2 inch (approximately 0.6 to 1.3 centimeters) downward at the back of the unit. This allows the condensate to flow towards the rear and drain outside through the condensate drain or drip pan, preventing water buildup inside the unit.
Always follow the manufacturer's instructions and guidelines for proper installation and maintenance of your window air conditioner to ensure its optimal performance and longevity. If you're unsure about the installation process or the correct tilt, it's best to consult the user manual or seek assistance from a professional installer.