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When it’s time to update your outdated furnace, it’s important to understand one size does not fit all.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 correctly 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 select a furnace oversized for your space, you’ll start to run into short cycles. This is because your oversized furnace heated your home too fast, turning off before the furnace can reach correct operating temperatures. An undersized or oversized system can lead to reduced lifespan and cost you more in energy bills.

How can you be sure you know the correct furnace size for your home? Get started with a load calculation from the experts at O'Brien Heating & Air Conditioning. A load calculation takes aspects from your home into consideration and measures 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—How big is the area your furnace will be heating? A technician will be sure to carefully measure the square footage of your home. Not every inch of your home needs to be included during this process. Many times, it is more beneficial to account only for the space that needs heating.
  • Home Insulation—Insulation helps keep warm air from filtering out of your home during the cold winter months. It also heavily affects energy efficiency and how large of a heating system will be necessary. Let the professionals from O'Brien Heating & Air Conditioning take a look at the insulation in your walls and attic. They’ll help you choose 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 influence your heating and cooling requirements.
  • Outdoor Climate—Consider the range of weather you receive in Drexel Hill. You’ll want a furnace that can handle the conditions of your area every year, without overworking itself.

Don’t settle for ‘close enough’ when selecting your new furnace. Let the experts at O'Brien Heating & Air Conditioning help you pick a unit that will fit your home properly. When you’re ready to get started, contact us at 610-257-7035 or schedule an appointment online. Whether you have a few more questions about furnace size or want to chat about options for your space, we’re happy to help you out.