In a series of studies conducted by Nest, they found savings of about 10 to 12 percent of heating use and electric savings equal to about 15 percent of cooling use in homes with central air conditioning for customers comparing utility bills before and after installation of the Nest Learning Thermostat. In an online forum, Nest users reported savings of $10 to $20 per month. According to data from an internal analysis in 2013, ecobee customers in the United States saved even more on their HVAC costs—up to 23 percent.
When it comes down to it, your particular energy savings will depend on many things, like where your business is, your team’s daily routine, and what type of building you have. One of the biggest factors is how much energy you’ve used in the past.
If historically you’ve kept your HVAC system running all day and night, then introducing automatic setbacks using a smart thermostat will likely give big savings.
On the other hand, if you don’t run your HVAC system much at all—or if you’ve been super vigilant about adjusting your system manually—then you’ll see much smaller savings.
But the extra benefits that you get with smart thermostats, like regular energy reports and remote access, might still make the switch worth it for you.