Nest thermostats are modern thermostat systems. They are controlled over wifi and optimize your household temperatures to help save energy. Smart thermostats, like Nest, remember your temperature control behavior and adapt appropriately to climate changes. What Nest does is basically control your household’s temperature for you, which allows it to make the proper adjustments in a timely manner and ultimately reduces energy use.
Nest users have provided testimonials stating that they save anywhere between 10%-25% on their energy bills.