Washington Gas Room Heaters Pre-instruction Checklist is an important document that is used to ensure the safety and efficiency of gas-powered room heaters. This checklist outlines the necessary steps that need to be taken prior to installation and operation of the heater. In general, the checklist includes the inspection of the following: gas pressure, temperature, venting, wiring, and safety devices. The Washington Gas Room Heaters Pre-instruction Checklist is divided into two main categories: (1) pre-installation inspection, and (2) operational inspection. The pre-installation inspection includes the verification of the heater’s gas line size, pressure, temperature, venting, and wiring. It also includes the inspection of the safety devices, such as the thermostat, pressure switch, and flame safeguard. The operational inspection includes the verification of the heater’s ignition system, burner operation, and safety devices. It also requires the observation of the heater’s flame pattern and smoke emission. Overall, the Washington Gas Room Heaters Pre-instruction Checklist serves as an important tool to ensure the safe and efficient operation of gas-powered room heaters.