About this item Manage Your Comfort at Home or Across the Globe Heating and cooling account for 48% of the energy use in a typical U.S. home, making it the largest energy expense for most households. When set properly for current weather conditions, smart thermostats are estimated to save homeowners an above average 5% to 15% (and sometimes more) off of those energy costs (energy.gov). The new 2GIG Thermostat is one of the easiest smart thermostats to install and is controllable by all Z-Wave hubs, including all 2GIG security systems. When integrated with the apps that control your Z-Wave hub,you can adjust your home’s HVAC settings from any smartphone or tablet, whether you are sitting in your living room or in a hotel room across the globe. Operating Requirements Replace the existing thermostat by connecting the wires to the corresponding inputs 4 AA batteries or connection to the 24 VAC “C” wire from the HVAC System Using the battery-powered version, low-voltage integrators can connect the thermostat to 95% of HVAC systems without the help of an electrician or HVAC contractor. Its flexible design also allows for the thermostat to be powered by the HVAC systems 24VAC “C” wire, if desired. Compatibility Works with all Z-Wave Hubs, including GIG GC2e, GC3e, and GC3 security panels.