What size furnace do I need?

January 31, 2019

When it’s time to update your outdated furnace, it’s important to understand one size does not fit all. A system that is not sized appropriately for your home, will not only impact your comfort, but can lead to shortened life of your furnace, and leave you stuck with higher energy bills.

If you pick a system oversized for your space, you’ll start to run into short cycles. The reason is that your oversized furnace heated your home too rapidly, turning off before the furnace can reach correct operating temperatures. An undersized or oversized system can lead to reduced lifespan and bigger expenses.

How can you be confident in the correct furnace size for your home? Start with a load calculation from the experts at B & G HVAC. A load calculation takes specifics from your home into account and gauges the Btu (a number that indicates the heating capacity of a furnace) necessary to heat your house.

Some Items that Influence Furnace Size

  • Square Footage—How large 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 will be accounted for 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 escaping your home throughout the cold winter months. It also strongly affects energy efficiency and how large of a heating system you’ll need. Let the team from B & G HVAC take a look at the insulation in your walls and attic. They’ll help you select the 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—Factor in the range of weather you receive in Marshalltown. You’ll want a furnace that can sustain the conditions of your environment every year, without overworking itself.

Don’t settle for ‘close enough’ when choosing your new furnace. Let the qualified technicians at B & G HVAC help you find a unit that will fit your home properly. When you’re ready to begin, you can reach us at 641-323-1210 or schedule an appointment online. Whether you have some questions about furnace size or want to discuss options for your space, our experts are happy to help you out.