Heating and Cooling Mechanical Thermostat
Works with most single-stage heating and cooling, 24 volt and millivolt systems. Compatible with standard heating and cooling, standard heat only, millivolt heat only (floor or wall furnaces), standard central air conditioning, gas or oil heat, electric furnace, and hydronic (hot water) zone heat-2 wires. Easy to install and use, mounting hardware and installation guide included. Mercury free. 1 year warranty.