Perhaps you need to replace your furnace for this coming heating season or you’re considering upgrading or replacing it before the need becomes urgent. (You certainly don’t want to go through the process of researching, purchasing, and installing a furnace in Minnesota in January if you can avoid it by planning ahead.) Or perhaps you are building a new home and considering which system to start with.
Whatever your situation is, it’s important to know the basics about furnace heating systems before you begin narrowing down your options.