I have a four story current home in the northern section of the country. Cold Winters are the norm in this space of the planet. My utility costs have raised dramatically each Winter. I wondered if our furnace and Heating and Air Conditioning unit was working less efficiently. I called the local heating and cooling pro to help me understand what is going wrong. The Heating and Air Conditioning corporation drive out to do the normal seasonal repair and diagnose any problems. The Heating and Air Conditioning tech thoroughly inspected the entire furnace. I was happy to find out that the furnace nor the rest of the Heating and Air Conditioning was to blame. But I was baffled why it was costing me so much more to heat our house. The Heating and Air Conditioning tech asked if the people I was with and I could check the attic. I didn’t understand since the Heating and Air Conditioning unit was in the basement. The tech man and I went to the attic. He looked around the entire attic for nearly twenty minutes. I didn’t realize when he said that I was a victim of the stack effect. The Heating and Air Conditioning tech explained that cabin love mine fall victim to the stack effect quite frequently. The problem is not really the Heating and Air Conditioning system. The problem is heat escaping through the roof. Warm air escapes through leaks in the roof which in turn draws cold air from outside through leaks in the rest of the house. The Heating and Air Conditioning company suggested that I add some more insulation in the attic. He also proposed I seal leaks in the roof structure. The stack effect was what had been taking my sizzling air. I now realize how to lower those energy bills.