Use the control knob to select your desired heat level. Safe Operation with Auto Shut-Off Safety Controls. Installation is easy with no venting required.Manual and Hydraulic Thermostat Controls. The item "Empire 30,000 BTU SR-30T-N Vent-Free Infrared Gas Heater Thermostat Control NG" is in sale since Thursday, October 28, 2021. This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Heating & Cooling Appliances\Space Heaters". The seller is "totalhomesupply" and is located in Pine Brook, New Jersey. This item can be shipped to United States.