Gas Fitter Practice Test

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Which type of room heater is permissible to install in a bathroom?

  1. Natural draft

  2. Direct fired

  3. Forced draft

  4. Direct vent

The correct answer is: Direct fired

The permissible type of room heater to install in a bathroom is a direct vent heater. Direct vent heaters are designed specifically for safe operation in areas where moisture and humidity are prevalent, such as bathrooms. They draw air from the outside for combustion and exhaust combustion gases directly outside, minimizing the risk of carbon monoxide buildup and improving safety in enclosed spaces. This configuration ensures that all combustion takes place with a sealed system, providing not only efficient heating but also protecting the indoor air quality in sensitive areas like bathrooms. Furthermore, many direct vent models comply with local codes and safety regulations, making them a suitable choice for residential applications in bathrooms. In contrast, other types such as natural draft, direct-fired, and forced draft heaters may not be compliant or safe for bathroom use because they can lead to potential hazards related to combustion byproducts and airflow restrictions in confined spaces.

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