Air Curtain

What is an air curtain

A device that puts out a continuous stream of air over a door; this keeps conditioned air in and doesn't let outside air come in. Air curtains also help in keeping insects out by making the entry point too turbulent for them to fly through. They are usually installed over a door that remains open for more time, thus saving on the buildings heating and cooling systems by helping maintain temperature. A common place one finds them is at the entrance at superstores.

It will take a while to pay off though, the initial investment may not make sense. An air curtain's effectiveness in preventing infiltration through the entrance ranges from 60 to 80 percent.

Air curtains are available at relatively mid-range prices, the size does affect the price. What size one needs to install depends on the size of the door in question. Known brands producing them include Caravell, Carrier and Esquire.