Oil fired water heaters are tested under which standard?

• A. UL 2158
• B. UL 732
• C. UL 896
• D. UL 858

Answer: (D)

Oil-fired water heaters are tested under the standard UL 858. This standard specifically addresses the safety and performance requirements for appliances that utilize oil as a fuel source for heating water. It ensures that these water heaters operate safely and efficiently, preventing hazards associated with oil combustion.

In contrast, the other standards listed focus on different types of appliances or applications. For example, UL 2158 pertains to the safety of vented and unvented electric clothes dryers, while UL 732 deals with the performance and safety criteria of electric water heaters. UL 896 targets gas-fired water heaters, so it is also not applicable to oil-fired models.

Understanding which standard applies to oil-fired water heaters is crucial for contractors and technicians to ensure compliance with safety regulations and to effectively service and install these systems.