What size furnace do I need?

January 31, 2019

When the time comes to update your outdated furnace, it’s important to know that one size does not fit all. A system that is not sized appropriately for your home, will not only hurt your comfort, but can result in shortened life of your furnace, and leave you spending extra money on your utility bills.

If you choose a system oversized for your home, you’ll start to notice short cycles. This means your oversized furnace heated your home too rapidly, turning off before the furnace can reach the right operating temperatures. An undersized or oversized system can lead to decreased lifespan and higher costs.

How can you be sure you know the correct furnace size for your home? Start with a load calculation from the experts at American HVAC Inc. A load calculation takes aspects from your home into account and gauges the Btu (a number that indicates the heating capacity of a furnace) required to heat your space.

Some Items that Influence Furnace Size

  • Square Footage—What size is the area your furnace will be heating? The technician will be sure to carefully measure the square footage of your home. Not every inch of your home will be accounted for during this process. Usually, it is more useful to account only for the space that needs heating.
  • Home Insulation—Insulation assists in keeping warm air from leaving your home during the cold winter months. It also strongly affects energy efficiency and how large of a heating system will be necessary. Let the team from American HVAC Inc review the insulation in your walls and attic. They’ll help you choose the best furnace for your house.
  • Type of Window— Just like your walls, the certain type of windows in your home, frame type, glaze type, gas fills/spaces, etc. will play into what heating and cooling needs your home requires.
  • Outdoor Climate—Think about the range of weather you get in San Jose. You’ll want a furnace that can keep up with the conditions of your climate every year, without overworking itself.

Don’t settle for ‘close enough’ when selecting your new furnace. Let the professionals at American HVAC Inc help you pick a solution that will fit your home properly. When you’re ready to begin, you can reach us at 408-215-1018 or schedule an appointment online. Whether you have a few more questions about furnace size or want to discuss options for your space, our experts are happy to help you out.