For more detailed instructions refer to the complete Energy Management Thermostat Installation and Operation Manual. This is located online at HVAC System / Thermostat Overview The RFTSTAT01 connects to the HVAC system’s thermostat connections just like a traditional thermostat. HVAC System Compatibility The RFTSTAT01 is compatible with most heating and cooling systems. There are two types of HVAC systems: Standard (gas/electric) Heat Pump systems Setpoint Status Up/Down Indicator Buttons LEDs H