Furnaces are an integral component to any home. They help to keep you and your loved ones safe and comfortable when winter rolls around. Many people don’t know exactly how these masterpieces truly work. They don’t have an understanding of how the furnace is able to circulate the heat throughout the entire home. If you want to learn how your furnace works, keep reading.
To create heat that is capable of being distributed and flowing throughout your home, you have to have a fuel source. Long ago, it would be coal or wood. Today, most furnaces are field by either propane or natural gas. This fuel is pumped into your furnace using an external source, whether that be a propane tank at your home or the city gas lines.
The fuel source has to be ignited using a pilot light. The pilot can either be a spark igniter similar to a spark plug or an electric glow bar. They can also be small, always-burning flames that are nestled in a position close to the main fuel line. Either way, whenever the furnace is activated, the fuel source will begin flowing and the pilot ignites.
Most of the furnaces today operate using two simultaneous systems. These systems will both move the air, working in different manners with different goals.
The first of the systems uses a draft inducer as the fan. This fan will work to pull the air past the open flames and to the furnace. Air will then carry the heat from the flames and through the furnace pipes, which can get quite hot. That air is then pushed through the chimney and out of your home. Since this air is loaded with carbon monoxide, it is dangerous to keep it inside of the home. To make sure everyone is safe, the air has to be pumped out of the home.
A larger blower fan makes up the second system. This particular fan works by sucking in the cool air from inside of your home and pushing it into the furnace. It will move past your hot pipes inside of your furnace picking up heat along the way. That heat is then forced through the ductwork and out of the vents in your home. The hot air will be circulated throughout the home until it cools and is sucked back into the furnace intake.
Everyone is familiar with the thermostat. You use it to adjust the temperature of the home and for turning your furnace on and off. It contains a thermometer that continually reads the internal temp of your home, which is what keeps your home regulated. It lets the furnace know when to begin circulating the air in your home and when to turn the furnace off.