Final answer:
A gas dryer should properly vent to the exterior, and it is not recommended to vent into a chimney, share vents with bathroom exhausts, or merge with water heater flue vents due to safety and efficiency concerns.
Step-by-step explanation:
The question relates to the proper venting of a gas dryer. A gas dryer should vent to the exterior to ensure the safe and proper removal of combustion gases and moisture from the dry clothes. It is generally not recommended for a dryer to vent into a chimney, share a vent with a bathroom exhaust, or merge with a water heater flue vent as these practices can lead to problems related to poor venting, moisture issues, and potentially hazardous situations due to the mixture of different combustion gases.
It is crucial to follow the manufacturer's instructions regarding the installation and venting of gas dryers and to adhere to local building codes. Proper venting is not just about efficiency; it ensures safety by preventing the accumulation of combustion gases in the living space, which could include carbon monoxide, a potentially deadly gas.