Final answer:
Water heater draft hoods or barometric draft regulators shall be installed in accordance with the manufacturer's instructions and local codes for safe operation.
Step-by-step explanation:
The question asks about the correct installation or placement of water heater draft hoods or barometric draft regulators. These components are important for the safe operation of a water heater, as they help regulate the draft of combustion gases from a gas-fired water heater to the outside. The draft hood or draft regulator must be installed properly to ensure they perform their function effectively.
According to most building codes and safety standards, water heater draft hoods or barometric draft regulators shall be installed in accordance with the manufacturer's instructions and local codes. This ensures that they are properly positioned for the appliance they are being used with, and that the vent system maintains a neutral or slightly negative pressure to safely vent combustion gases.
It is critical for safety that these devices are not obstructed and are maintained regularly, as a malfunction can lead to improper venting of hazardous gases such as carbon monoxide into the living space.