A new build home will need a furnace, and they also don’t last forever, so maybe your old furnace needs replacing. In any case, you may be asking what size furnace do I need? Planning out an HVAC system can be complicated, but this is a calculation that anybody can do. You need a few bits of data and the formula.
The calculation depends on your climate for pretty obvious reasons. If you live in a cold place, you’re going to need more muscle to get the job done. If you live in the sunbelt, you probably won’t need as much. The United States is a huge country in terms of geographic size, which means many different climates.
Once you’ve determined what climate you are in, all you have to do is take that recommended number and multiply it by the square footage of your home.
Say you live in the high desert in a 2,000 square foot home; your calculation would look something like this on the low side:
45 BTU’s per square foot x 2,000 square feet = 90,000 BTU’s
On the high side:
50 BTU’s per square foot x 2,000 square feet = 100,000 BTU’s
You’re going to have to make an executive decision about whether or not you want to play it safe or play it cheap and pick somewhere in that range.
Now that you know what size furnace you need in terms of BTU's, it's time to make other considerations before making a purchase. Check out all our helpful resources. We carry a huge inventory of HVAC parts like blowers, furnace ignitors, blower wheels, etc. Did you know that you can find member pricing here on certain items (typically name brand, MAP priced items) if you log in? For industry professionals buying in bulk, please consider contacting us directly for extra special pricing and extra savings.