Propane Model with 19″ installation collar.   How It Works Start Up: This is done by use of a wall switch or remote control. When the ON command is received, the system completes initial safety checks then starts flow of pilot gas. After 5 seconds the hot surface igniter glows igniting pilot flame. When the system confirms pilot flame present, the main burner gas will flow ignited by the pilot flame. Operation: While enjoying the ambiance of your fire pit, the system is at work monitoring flame status, internal temperatures / voltages and other safety parameters. If flame loss does occur, the system will turn off all gas flow, and then restart by automatically commencing Start sequence. On/Off Models: Includes the convenience and safety features- optional remote control available. High / Low Flame Control Models: This option includes a smart remote control with 2-way communication with the fire pit. Remote allows flame height control while receiving information from fire pit to advise user of fire pit status (flashing LED). Shut Down: To turn OFF the fire pit simply use wall switch, remote control or whole house system. Features Fully Assembled- ready t