My furnace is upwards of twenty years old, and is clearly showing its age. Considering that my heater still functions to some degree, I have been completely reluctant to replace it. The furnace was already installed when I purchased this property and has worked fairly well. In the last several years, however, its performance has significantly diminished. On colder days, the furnace shuts off on its own. It runs constantly due to its lack of ability to handle the demand. There are cold spots in the corners, and I’m suspicious that the majority of the heat is trapped close to the ceiling. Every year, I think the furnace is becoming a bit louder. It now rattles when it starts up, makes an unpleasant screeching noise every now and then, and there’s an alarming sound when it shuts down. Because the furnace is quite old, it has very few features. There is no way to adjust the speed of operation. It either runs at maximum capacity or shuts off. It also costs me a lot in energy bills every month. At least I don’t have to consider replacing the filter very often. This is because the filtration system does not work all that well, and dust and other contaminants are pumped through the air my family breathes. I researched some modern furnaces, and now I know that I could save money and improve comfort by updating my equipment. There are models that may well operate at speeds anywhere between forty and a hundred percent, and automatically adapt capacity to the changing needs of your home. There are models that can be controlled through an app using any smart device. I could even create zone control within the home, and personalize the temperature settings in different rooms.