The Venstar VST1010 1-Day 2H/2C Programmable Thermostat is a reliable temperature control device designed for single-day scheduling in HVAC systems with two heat and two cool stages. It monitors ambient temperature and adjusts heating and cooling outputs according to the programmed daily schedule, optimizing comfort and efficiency. Suitable for furnaces, heat pumps, and air conditioni... https://www.partshnc.com/vst1010-venstar-venstar-1-day-2h2c-prog-tstat