Ever since my husband and I have gotten married, my in-laws have tried to give us unsolicited advice on everything in our lives. From types of dish soaps to HVAC maintenance to birth control, they have an opinion on everything. While their thoughts on my reproductive health were not appreciated, we did learn a lot from what they had to say about our HVAC systems. My in-laws have lived in the same home for over 20 years, and they have never had a problem with their air conditioner or their heater. They attribute their success to the regular HVAC maintenance that they receive from their local HVAC repair shop. As soon as they moved into their home, they enrolled in the HVAC service plan. The HVAC service plan guaranteed them a regular HVAC tune-up every year, and gave them discounts and priority service on all other HVAC products. As a wedding gift, they even offered to enroll us in the same HVAC service plan that they use, and I’m sure glad they did. On his first visit, the HVAC technician found a lot of problems with our air conditioning system. Our air ducts were totally clogged and desperately needed cleaning. He came back later the following day equipped with a long vacuum hose apparatus to thoroughly clean out our air ducts. After that, my husband noticed a big difference in our indoor air quality and have been breathing easy ever since! Even though their advice is sometimes very annoying, I guess my in-laws were right about having our HVAC system serviced regularly.