HVAC ton calculator

Air conditioner power consumption  May 1, 2012 – 09:00 pm

One of our most popular posts is best HVAC energy calculators I’ve found.

The only downside of this method is you may have to do a little digging on the internet to find the correct information, but once you find it your results should be more accurate. You only need to know three things:

  • Equipment size (tons)
  • SEER
  • Electricity rate ($/kWh)

You can easily find your electrical rate from your power bill (it may not be listed on there, but just divide the total amount of the bill by your total kWh consumed for the month).  You may have to find out the other two pieces of information by digging up your AC unit’s manual.

I had to do this for my Lennox AC units because the tonnage and SEER rating weren’t listed on the label.  I had to google the model number.  I have a split system (multiple units for my home to allow for greater zone control) and here is what my two unit’s labels look like:

I found the SEER (13) from a product brochure for my Lennox 13ACD units.  Wikipedia defines the seasonal energy efficiency ration (SEER) as:

Source: mapawatt

Lux Products Corporation Ace Economy Thermostat (at101143sa010)
Home Improvement (Lux Products Corporation)
  • Heating and cooling
  • Mercury free snap action mechanism
  • Fits most 6 to 30 volt and mill volt systems
  • Adjustable heat anticipator
  • Includes wall plate

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