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What Size Furnace Do I Need for a 2000 Square Foot Home

“What size furnace do I need for a 2000 square foot home?” is the right question to ask. The square footage of your home is the most important variable in determining furnace size. Furnaces are built with various heat output capacities which are measured in British Thermal Units (BTUs). Larger homes need furnaces with higher BTUs. You can find the square footage of your home on the real estate records from when you purchased the property. You can also measure the dimensions of every room and add them up. This provides an estimate of square footage that will suffice for calculating what furnace size you will need.

Factors That Influence Furnace Size What Size Furnace Do I Need

Although home size is the primary variable, important secondary issues are:

  • Climate
  • Insulation
  • Furnace efficiency rating

For heating purposes, the country is divided into climate zones. The Delaware Valley falls into Zone 3, but the region is on the border of the colder Zone 4. This means you might want to select a higher BTU furnace unless your home is well insulated. In Zone 3, a furnace should deliver 45 to 50 BTUs of heat output per square foot.

Insulation reduces heat loss from a building. A modern home with wall and attic insulation and modern windows places less strain on a furnace. You’ll be able to select a furnace at the lower end of the appropriate BTU range. With a well-insulated Zone 3 home, you would want 45 BTUs per square foot. An older home with little to no insulation will require a more powerful furnace. Minimal insulation and drafty windows require a furnace on the higher end of the appropriate BTU range. An older home without good insulation would need a furnace with 50 BTU per square foot.

Furnaces are also built with different efficiencies expressed as a percentage. You’ll see furnaces with ratings like 80% or 96%. The percentage indicates how much of the BTU output actually translates into heat for your home. For example, a low-efficiency 80% 100,000 BTU furnace delivers 80,0000 BTUs of heat in reality. Alternatively, a high-efficiency 96% 100,000 BTU furnaces results in 97,0000 BTUs of heat output.

How to Calculate Furnace Size For a 2000 Square Foot Home Steps

  1. Find out the square footage of your home.
  2. Examine your insulation, windows, and doors. A drafty, poorly insulated home needs a more powerful furnace.
  3. Multiple square footage by 45 or 50 BTUs depending on insulation status.
  4. This produces the BTU output that you need to heat your home efficiently.
  5. If choosing a low-efficiency furnace, consider bumping up the BTU figure to account for the heat loss.
  6. A high-efficiency furnace should be close enough that you don’t need to bump up to a higher BTU.

Expert Guidance for Sizing a Furnace

Oliver Heating & Cooling has been keeping people’s homes warm throughout the Delaware Valley for 50 years. We fully understand the heating demands of this climate. We also know how to address the heating needs of an older home. Getting the BTU size of a furnace right is vital for comfort, safety, and control of utility bills. A furnace that is too small will run constantly but still fail to keep the home comfortable. All of the excessive run time will wear out the furnace faster too. If you select a system that is too large, then the furnace runs in short cycles. This creates excessive wear and tear and results in cold spots throughout the home. We can help you make an ideal furnace size choice and perform professional installation services you can count on. Contact Oliver about your furnace replacement today.

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