The purpose of a home ventilation system is to maintain a healthy living environment by supplying fresh air to your home while at the same time removing stale and polluted air. Home ventilation also helps to maintain proper humidity levels of 30 to 50 percent. The air in your home is used many times over, often with fresh air entering only when we open doors or windows. As we strive to build homes more and more energy efficient, we create an environment prone to indoor air quality problems, the…