HVAC Contractor helping a couple choose a furnace

What size furnace do I need?

When the time comes to replace your outdated furnace, it’s important to know that one size does not fit all. A system that is not sized correctly for your home, will not only hurt your comfort, but can result in shortened life of your furnace, and leave you with larger energy costs.

If you select a unit oversized for your house, you’ll start to run into short cycles. This is because your oversized furnace heated your home too rapidly, turning off before the furnace can reach proper operating temperatures. An undersized or oversized system can lead to reduced lifespan and bigger expenses.

How can you be confident in the right furnace size for your home? Start with a load calculation from the team at Contra Costa Heating & AC. A load calculation takes specifics from your home into account and measures the Btu (a number that indicates the heating capacity of a furnace) required to heat your house.

Some Factors that Influence Furnace Size

  • Square Footage—How big is the area your furnace will have to heat up? Your technician will be sure to carefully measure the square footage of your home. Not every inch of your home may be included during this process. Usually, it is more useful to account only for the space that needs heating.
  • Home Insulation—Insulation helps keep warm air from filtering out of your home through the cold winter months. It also greatly affects energy efficiency and how large of a heating system will be necessary. Let the professionals from Contra Costa Heating & AC take a look at the insulation in your walls and attic. They’ll help you find a perfect furnace for your house.
  • Type of Window— Just like your walls, the specific 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—Consider the range of weather you receive in the Bay Area. You’ll want a furnace that can sustain the conditions of your area every year, without overworking itself.

Don’t settle for ‘close enough’ when picking your new furnace. Let the professionals at Contra Costa Heating & AC help you identify a system that will fit your home properly. When you’re ready to start the process, call us at 510-343-9841 or book an appointment online. Whether you have additional questions about furnace size or want to chat about options for your space, our experts are happy to help you out.

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