This feature uses an outdoor temperature sensor to communicate with the boiler's control system. Instead of the boiler firing at a fixed, high temperature every time the thermostat calls for heat, it automatically adjusts the water temperature based on how cold it actually is outside.
: On a mildly chilly day, the boiler might only heat the water to . On a freezing day, it will ramp up to Why it's a "must-have" : buy gas boiler
, offer Wi-Fi or Bluetooth for remote monitoring and adjustments via a smartphone app. This feature uses an outdoor temperature sensor to