Why is it necessary to monitor gas-fired hot water heaters?

Monitoring gas-fired hot water heaters is essential primarily to check for backdrafting. Backdrafting occurs when combustion gases are not properly vented outside and instead flow back into the home, posing serious health risks such as carbon monoxide poisoning. By ensuring that there is no backdraft, one can confirm that the hot water heater is functioning safely and that combustion gases are effectively being expelled, maintaining proper indoor air quality.

While insulation, energy efficiency, and water temperature are important aspects to consider in maintaining hot water heaters, they do not directly relate to the immediate safety risks associated with the operation of gas appliances. The focus on backdrafting prioritizes safety and compliance with health regulations, making it a critical reason for monitoring these appliances.