ecobee customers in the US saved up to 23% on their heating and cooling costs, based on an internal analysis conducted on October 2, 2013.
How are energy savings calculated?
ecobee calculates energy savings by correlating how long your heating and cooling equipment run to local weather conditions. Energy savings are calculated relative to a commonly used desired temperature of 72°F (22°C).
We calculate your estimated cost savings based on your equipment’s runtime savings, the average electricity rate in your area and the heating fuel rate for your state.
We use the same method to calculate the statistics in the Monthly Energy Report email for eco+ users. If you are an eco+ user with more than one thermostat, the percentages reported under Total Monthly Savings and Neighborhood Comparison are the averages across all your thermostats, while the Total Monthly Runtime figure is the total combined runtime of all of your thermostats.
How does changing my desired temperature (set point) affect energy savings?
As the difference between indoor and outdoor temperature increases, the rate at which a home exchanges heat with its surroundings also increases. To maintain a constant indoor temperature, your heating or cooling system has to run longer to keep up when this exchange increases. You can save energy by minimizing the difference between your indoor temperature and the outdoor temperature. This means setting a higher desired temperature during the cooling months and a lower set point during the heating months.
What are some other factors that may impact the actual energy savings I see?
Your individual energy savings will vary based on geographic location, local weather conditions, type of heating and cooling equipment, size of home, and your home’s energy-tightness.