Landlord Thermostat - HC7176 Residential - 100% Tamper proof Thermostat. We Are The Original Landlord Thermostat Makers! Saves you up to 30% in energy costs. Limits heat to 71 degrees AND limits A/C to 76 degrees Limits Cannot be changed, Absolutely Tamper Proof Engineered for Landlord's and property managers 2 Year Warranty