The Nest Learning Thermostat saves U.S. customers about 10 to 15 percent on heating and cooling bills, according to new reports.

Based on two independent studies and one internal one, Nest on Monday touted the positive results, revealing average savings of $131 to $145 per year.

"[W]hich means the Nest Thermostat paid for itself in under two years," founder Matt Rogers wrote in a blog post.

Nest's own study pulled before-and-after energy data from homeowners across America; two independently funded, designed, and evaluated studies looked at families in Oregon and Indiana.

"Nest is constantly improving," Rogers said. "And that's why we decided to do something no other thermostat maker has done: find out how much our thermostat saves. In real homes. For real families. Across the country.

"Some saved less on their energy bills, some saved more," Rogers continued, "and many likely experienced events—like long vacations or new babies—that affected their energy bills more than switching thermostats ever could. But on average, after people installed Nest they saw real savings."

Reminiscent of an iPod classic click wheel, the Nest Thermostat launched in October 2011, picking up speed by the spring of 2012, when the device hit the online Apple Store for $250. It later went on sale in Canada and the U.K.

As its name suggests, Nest learns over time, getting better at saving energy the longer you own it. Over the last three years, the developers have updated their thermostat more than 30 times, adding new features for even more savings.

"[C]ustomers can feel even more confident about investing in a Nest Thermostat," Ben Bixby, general manager of energy services, said in a statement. "And our energy partners can be assured that energy-efficiency programs involving Nest will have an impact."

For more, see PCMag's review of the Nest Learning Thermostat and the slideshow above.