Because of the severe weather in the area where I live, there is rarely an opportunity to open the windows and allow in fresh air. It is necessary to rely on either a heating or cooling system just about year round. To avoid unnecessarily high utility bills, I’ve gone to great lengths to tightly seal my home. I’ve spent a small fortune to replace all of the old windows with Energy Star rated windows. I’ve caulked around the windows, weatherstripped all of the doors, and installed ceiling fans. I hired a licensed HVAC contractor to improve the insulations in the walls, ceilings and crawlspaces, and install an attic fan. I’ve enrolled in an HVAC maintenance plan, which includes two professional service calls per year. A licensed technician shows up in the spring and fall to clean, tune and inspect the furnace and air conditioner. He removes the buildup of contaminants within the inner workings, which could block airflow, cause longer running times, and result in higher energy bills. All of my efforts help to keep my monthly costs as low as possible. However, I’ve also eliminated ventilation and trapped all sorts of pollutants inside the house. Things like dust, dander, fumes, bacteria and viruses simply get circulated for months at a time, are breathed by my family, and cause a serious health concern. To combat this problem, I’ve invested in a heat recovery ventilation system. The ventilator is a lot like opening a window with none of the drawbacks. It brings in fresh outside air without energy waste. The ventilator actually reduces the workload of the furnace by using the outgoing stale air to preheat the incoming air. In the summer, it helps to combat excess humidity. The ventilator has helped to lower my monthly costs while improving the health, cleanliness and enjoyment of my home.