Which of these would be a reliable source for energy consumption data on an appliance?

The owner's manual for the appliance is considered a reliable source for energy consumption data because it typically includes detailed specifications provided by the manufacturer. These specifications often include energy efficiency ratings, average energy usage, and other pertinent information that can accurately inform about the appliance's performance and energy requirements. Manufacturers provide this information to help consumers understand how to operate the appliance effectively and to promote energy efficiency.

In contrast, while a local hardware store employee may have some knowledge, their information might be based on personal experience or general trends rather than specific data. Online forums can reflect diverse opinions and anecdotal experiences, which may not be reliable or consistent. Family opinions on usage can vary greatly, depending on individual habits and perceptions, thus lacking accuracy and objectivity in reporting energy consumption.