Final answer:
The question discusses the installation and safety precautions for gas-fired hot water heaters, emphasizing the need for professional installation and the dangers of back draft.
Step-by-step explanation:
The question pertains to the installation and monitoring of gas-fired hot water heaters. For safety reasons, it is crucial to ensure that these appliances are installed correctly by a qualified Manager and that they are routinely checked for potential back draft issues which can lead to the release of harmful pollutants inside the dwelling. An on-demand electric hot water heater is a type of water heater that supplies heat only when necessary, according to the figure provided.
It's also important to mention that according to a given example, a natural gas hot water heater is approximately 85% efficient in transferring the heat to the water, while an electric hot water heater exhibits 100% efficiency when converting energy to heat in water. In evaluating overall energy utilization, it is noted that when considering the efficiency of energy production and transmission, one method might use more fossil fuel energy than the other.
Ventilation while using gas appliances is vital, as highlighted by the statistic indicating dozens of deaths due to improper ventilation. This underscores the importance of following manufacturer instructions and proper maintenance to prevent such hazards.
A reference to the heater's BTU rating indicates the time it takes to heat water; a 30,000 Btu rated heater would take an hour and 20 minutes to function effectively. This kind of specification helps to understand the operational capabilities of the heater.