Which of the following is necessary for the efficient operation of gas appliances?

Proper gas supply pressure is essential for the efficient operation of gas appliances. Gas appliances are designed to operate within a specific pressure range, which ensures that they burn fuel correctly and safely. If the gas supply pressure is too low, the appliance may not ignite or function properly, leading to incomplete combustion and reduced efficiency. Conversely, if the pressure is too high, it can pose a safety hazard and also result in inefficient operation, as the appliance may consume more fuel than necessary.

Maintaining the correct gas supply pressure helps ensure that the appliance performs optimally, providing the intended heat output and reducing energy waste. This balance not only maximizes efficiency but also minimizes emissions and enhances the overall safety of the gas appliance.