Tag: RTH110B Thermostat

  Honeywell RTH110B Non-Programmable Electronic Thermostat   Introduction a gas, fuel oil or electric furnace – 2 or 3 wires a central air conditioner – 2 or 3 wires a hot water system with or without pump – 2 wires  a millivolt system – 2 wires a central heating and cooling system – 4 or 5…