At All About Care Heating & Air, Inc., our mission is to help you keep your home comfortable in all seasons. As fall turns to winter, homeowners naturally become more concerned about their furnaces and whether they are working correctly. We understand these worries and believe that knowing how your furnace works can both alleviate unnecessary anxiety about your furnace and make you better equipped to spot real problems. We have put together this guide to how furnaces work to help you know when you can leave your furnace alone and when you should call us to have a look.

Furnaces work on the principle of forced air heating–the furnace heats up the air around it, and this warmer air is then moved throughout your home via a system of blowers and ducts. In natural gas furnaces, a pilot light–a small, continuously burning flame–ignites a series of burners inside a combustion chamber. The heat from the burners then enters the heat exchanger, where it is transferred to the air to raise it to the temperature indicated by the thermostat.

Once the air reaches the designated temperature, blowers send the air through the ducts to all parts of your home. Electrical furnaces work on the same principle, but instead of gas flames, they use electrical heating elements to heat the air to the desired temperature. If the thermostat is set to a low temperature, fewer heating coils will activate, while higher temperatures will activate more.

We hope that this information will help you make the best decisions to take care of your furnace. If you have further questions, our experienced team members are happy to consult with you.