When I was just a young one, my dad decided to pack up our family and move up north. Because I was so young, I didn’t know much about where we had been going exactly. Now that I’m much older, I’m aware that the location we moved to was found very far up north. With the exception of having honed my map-reading abilities, I am certain of this fact because of the intense winters we endured there. Since my dad is resourceful and frugal-minded, he chose to keep our home warm using a furnace–eventually upgrading from wood to gas, after having endured quite a bit of frustration. As nice as the unit and its system was, we eventually had to perform unexpected maintenance, thanks to mechanical failures. For example, after merely 4 years of service, my dad had to replace the vent piping. He did so via the services performed by a local handyman. What’s more, just before what was projected to be the coldest day of that year, the system suddenly shut down. Having learned their lesson from selling themselves short before, my folks called up an HVAC specialist assess the damage this time. Upon diagnosis, the tech explained that our system had failed because of a low “AFUE, ” or annual fuel utilization efficiency, which is how well a furnace performs during a select stint of hot and cold weather. In addition, he told us that our heating system consisted of five major components: the burner, heat exchanger, the system of ductwork, and our previously replaced flue or vent pipe. My dad had to replace the flue, once again, to get our unit back in working order. Suddenly, we were starting to build our very own Frankenstein furnace!