I currently am living in the southern section of the country, where air conditioning is a section of everyday life, then there is rarely a day of the year when I can shut down the cooling system, open the windows and welcome in a fresh breeze, then despite investing a pretty great deal of money into a top-of-the-line central air conditioning, I was not overly glad with the cost of my daily electric bills, however i took precautions to eliminate energy waste, including caulking around certain windows, weatherstripping the doors and adding more insulation to the attic. During the time that I significantly tightened up the house, I caused some troubles with indoor air quality. I prevented natural ventilation, making sure that contaminants became trapped inside, then any pet dander, dust, odors, bacteria or other allergens were simply circulated over and over again by the cooling system, then starting to look for a way to improve the health, comfort and efficiency of the home, I contacted a local Heating and Air Conditioning corporation for a recommendation. She had suggested to me that the replacement of a whole-lake house fan. This type of method is ideal when the outdoor air is cooler than indoor air, which is usually the case during the evening hours. We like to up all of the windows and the fan pulls in the cooler outdoor air and circulates it. It pushes the warmer, stale air up to the attic, where it is expelled by way of vents. I’m able to shut down the air conditioning without sacrificing comfort. In fact, the lake house is so much cooler in the mornings and I’ve chopped my electric bill in half. The air exchange given by the fan has also made a huge improvement in indoor air quality. The lake house is much cleaner and stinks better.