HC7176 Residential Thermostat is a completely tamper proof landlord thermostat that limits the heat to 71 and A/C to 76. No more getting taken advantage of by abusive tenants. Our HC7176 residential thermostat is extremely versatile. It is compatible with almost any residential system! It can operate on 2, 3, 4, 5, or 6 wire systems and it does not require a “common” connection! Typical 24V thermostat as found on almost all residential HVAC systems. Typical installation in about 5 minutes. Wire for wire replacement in most cases to industry standard coloring. The temperature setting range is 40F-71F when in the heat mode, and 76F-95F when in the air conditioning mode.