The cover is manufactured to fit perfectly over the part of the air conditioning unit on the inside of the house. With the adhesive tape for sealing and air waterproof sheets made of plastic, window air conditioner covers grasp and conform to the border of the unit, holding the cover in place. Having this sheet taped to the unit from the inside effectively keeps the air waterproof and also works to protect the seal from the inclement weather than oftentimes destroys an outside adhesive.
Before purchasing indoor air conditioner covers, it is important to measure the size of your AC unit based on the directions given by the manufacturer, as covers come in a variety of sizes. In addition, indoor air conditioner covers are made with a myriad of canvas options. This allows the buyer to choose the proper material for their air conditioner based on specific climates. For example, heavy duty canvases work for great protection from drafts, while an insulated canvas is central to quality thermal protection and the premium marine canvas is useful in climates that are wet.
This winter, instead of hanging out of the window in an attempt to install an outdoor air conditioner cover, which can be ripped off with the right gust of wind, you might want to invest in something more reliable; something like an indoor air conditioner cover.