How To Seal A Window Air Conditioner |link| -

Proper sealing is critical. Without it, cool air escapes, hot/humid air enters, and your energy bills spike. Here’s the right way to do it.

If you have no supplies on hand and need a temporary seal for one night: roll up a towel and wedge it between the top of the AC and the window sash. Remove it when you run the AC (blocks airflow), and only use for 1–2 days. how to seal a window air conditioner

The first step in the sealing process begins before the unit is even mounted: the integrity of the window itself. Most window units are designed for double-hung windows, which slide vertically. The weight of the air conditioner places significant stress on the lower window sash, while the upper sash is often left loose. To prevent the upper sash from sliding down or shifting, it is imperative to install L-brackets or angle brackets. These are typically provided by the manufacturer and are screwed into the upper sash to lock it against the window frame. Skipping this step not only compromises the seal but creates a security risk, as the window could be forced open from the outside. Proper sealing is critical

As the temperatures rise, the window air conditioner becomes an essential appliance for maintaining a comfortable indoor environment. However, the installation of these units often presents a significant vulnerability in the home’s thermal envelope. A poorly sealed air conditioner is not merely an inconvenience; it is an open invitation for hot air, humidity, insects, and even water to infiltrate the home. Conversely, the cool, expensive air generated by the unit can easily escape through gaps, leading to skyrocketing energy bills. Properly sealing a window air conditioner is a crucial home maintenance task that ensures efficiency, comfort, and safety. If you have no supplies on hand and