I’ve always taken the upkeep of our oil furnace and air conditioning system very seriously. I make sure to hire a certified local HVAC business to inspect, inspect and thoroughly sanitize the heating system every fall, and the cooling system ever spring. Because of my effort, I expect both systems to run at full capacity and efficiently. I was surprised, but not happy, last January when our oil furnace was struggling to keep up with our cooling demands. Since the outside temperature was down below zero, I had to turn up the temperature control a bit to compensate for the cold temperature. I felt that there were still cold spots in numerous rooms, plus the oil furnace seemed to be running way more than usual. I also smelt an unpleasant aroma in the lake house and it was a lot more dust floating around. I finally called the HVAC business to come back and recheck out the obviously manfunctioning oil furnace. He took the system apart and told me that the problem wasn’t the furnace but the air duct. He found a bunch of small holes throughout the duct, which were allowing our heated air to escape and was also drawing in cold, polluted outdoor air. These holes were making it nearly impossible for the oil furnace to maintain comfortable even temperature in the home. It forced the heating system to work harder and draw a lot more energy. I was paying needlessly high utility bills for inferior quality. I asked the service representative if the duct sealing process was to be time-consuming, messy and costly. Instead, he explained that HVAC business used a process called Aeroseal which was completed in about an hour. He first sealed off all of the registers, then blew pressurized air and adhesive particles into the duct system. As the air escaped through the holes, the adhesive particles built up along the edges plus effectively sealed them.