smart thermostats The 2026 Smart Thermostat Buyer's Guide for Men: Why an ecobee Beats a Nest for Most Houses, and the Wire That Decides It Before you compare apps, check for a C-wire behind your old thermostat. It decides whether the $139.99 ecobee Essential, the $259.99 Premium or the Nest Learning Thermostat is the right buy this heating season.
