The best Prime Day deals on smart thermostats include big discounts on Google Nest and more

If you buy through our links, we may earn money from affiliate partners. Smart thermostats are a great way to save money on heating and cooling costs. They use remote sensors, automation, scheduling, and machine learning to help run your home's climate system more efficiently. The best ones are also easy to install and many can be operated manually as well as through an app or with voice control.