White Rodgers Heat Only Mechanical Thermostat

Works with single-stage heating, 24 volt and millivolt systems. Compatible with standard heat only, millivolt heat only (floor or wall furnace), gas or oil heat, electric furnace, and hydronic (hot water) zone heat-2 wires. Easy to install and use. Decorative wall plate, mounting hardware, and installation guide included. Mercury free. 1 year warranty.