Lowering our energy bills

For a long time our energy bills were just too high. I immediately was ready to blame our Heating & A/C equipment. It was old, damaged & dirty. No wonder our bills were so high. I had a Heating & A/C business over to the house to do some cleaning, tightening & repairing. There was a small loose section & another a single that was covered in rust. After the repairs I was ready to experience lower energy bills. Nope, everything stayed the same. I started googling what was the problem. I was closing the curtains in the summer time to avoid the hot light coming in. In the Winter time I put towels under the doors to stop air from leaking out. I even caulked around all the windows. So what was the problem? I called our Heating & A/C professional back & told him about our energy complications. He immediately knew what was up. The guy inserted a camera into our air duct to take a peak. He found a truly small tear along a seam of our air duct. That small tear meant all the treated air our Heating & A/C created was leaking outdoors. How the guy performed air duct sealing was really cool. He took what looked appreciate a squirt gun & shot it into our air ducts. It was air that had sealant particles in it. The sealant can service major holes to minor tears appreciate mine. After messing around with that, he worked on the camera again & fixed the tear. I noticed a difference in our energy bills immediately afterwards. It is amazing how much of a change it was.