Quick Answer
Smart thermostats save energy by automatically adjusting temperatures when you are asleep or away, and let you control your HVAC from your phone. ENERGY STAR estimates certified smart thermostats save about 8% on heating and cooling bills. Most systems are compatible, though some need a C-wire.
How a smart thermostat saves money
Most of the savings come from not heating or cooling an empty house. Smart thermostats use schedules, phone location (geofencing) and occupancy sensors to set back the temperature automatically — something most people forget to do with a manual thermostat.
In Lincoln, where air conditioning carries the biggest share of summer energy use, even a few degrees of setback during work hours adds up over a long cooling season.
Features worth having
Beyond savings, these features improve day-to-day comfort:
- Phone app control from anywhere
- Monthly energy reports
- Filter change and maintenance reminders
- Remote room sensors to balance hot or cold rooms
- Alerts for unusual temperatures — useful for second homes and rentals
Is my system compatible?
Most single-stage and two-stage gas furnaces, air conditioners and heat pumps work with popular smart thermostats. Many models need a common wire (C-wire) for constant power. Multi-stage, variable-speed and dual-fuel systems need careful wiring — a professional install avoids damaging the control board.
Frequently Asked Questions
Do smart thermostats work with heat pumps?
Yes, most do. Heat pump wiring includes a reversing valve and sometimes auxiliary heat, so the thermostat must be configured correctly to avoid running expensive backup heat.
What is a C-wire and do I need one?
A C-wire supplies continuous 24-volt power to the thermostat. Many smart thermostats need one; if your home lacks it, a technician can run a new wire or install an adapter.