Give your family's comfort a smart upgrade. With the Sensi Lite smart thermostat, it's never been easier. It all starts with a quick & simple installation-no common wire required with most systems. Our top-rated mobile app lets you manage your home's HVAC from anywhere, anytime. Plus, your usage activity & personal data stays private. That's the power of putting Sensi's over 100 years of HVAC experience on your wall.