HVAC Contractor helping a couple choose a furnace

What size furnace do I need?

When it’s time to replace your outdated furnace, it’s important to realize one size does not fit all.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

If you pick a unit oversized for your house, you’ll start to experience short cycles. The reason is that 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 shortened lifespan and bigger expenses.

How can you be sure you know the correct furnace size for your home? Begin with a load calculation from the team at Jett's Heating & Air Inc.. A load calculation takes specifics from your home into review and measures the Btu (a number that indicates the heating capacity of a furnace) needed to heat your space.

Some Factors that Influence Furnace Size

  • Square Footage—How large is the area your furnace will have to heat up? The technician will be sure to carefully measure the square footage of your home. Not every inch of your home may be considered during this process. Usually, it is more useful to account only for the space that needs heating.
  • Home Insulation—Insulation works to keep warm air from leaving your home during the cold winter months. It also greatly affects energy efficiency and how large of a heating system will be necessary. Let the experts from Jett's Heating & Air Inc. evaluate the insulation in your walls and attic. They’ll help you find a ideal furnace for your house.
  • Type of Window— Just like your walls, the particular type of windows in your home, frame type, glaze type, gas fills/spaces, etc. will have an impact on the heating and cooling needs of your home.
  • Outdoor Climate—Think about the range of weather you experience in McHenry. You’ll want a furnace that can handle the conditions of your climate every year, without overworking itself.

Don’t settle for ‘close enough’ when choosing your new furnace. Let the professionals at Jett's Heating & Air Inc. help you pick a solution that will fit your home properly. When you’re ready to get started, call us at 815-410-1128 or book an appointment online. Whether you have a few more questions about furnace size or want to chat about options for your space, our team is happy to help you out.

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