Many people use the terms boiler, furnace, or boiler furnace interchangeably. However, they really are different things. When you’re trying to determine what is the difference between a boiler and a furnace, this guide can help.

At its core, a furnace is an appliance in your home that heats the space through the circulation of hot air. This is the primary difference between a furnace and a boiler, which heats your home using the circulation of hot water.