Through the FAA many airports in the U.S. developed programs to tightly seal homes below low level flight paths to reduce noise and avoid the introduction of fumes and jet fuel residuals.

American ALDES is the preferred specified manufacturer to provide ENERGY STAR rated Blending Ventilators to supply fresh air to these homes. The Blending Ventilators draw air from inside a home, mix it with fresh air from outside the home, pass the tempered air through a filter and then distribute the air to living spaces in the home. This is an extremely effective and efficient way to introduce fresh air into tightly sealed homes, and the slight positive pressure prevents unwanted contaminants from entering the home.