Manual thermostats and fans are examples of which type of devices?

Manual thermostats and fans are categorized as thermal control devices because their primary function is to manage and regulate temperature within a space. Thermal control devices are specifically designed to respond to thermal conditions by providing heating or cooling, thereby enhancing the comfort of occupants.

In the context of operational functionality, manual thermostats allow users to set desired temperatures, while fans facilitate air circulation, impacting the thermal environment. Both types of devices play crucial roles in maintaining comfortable indoor conditions through the direct management of heat and air movement.

The other options refer to broader categories of devices. Climate control devices can encompass a range of systems beyond just temperature regulation, including those that manage humidity. Environmental control systems generally include more comprehensive approaches that may address multiple environmental factors like air quality alongside temperature. Energy management systems focus primarily on optimizing energy consumption and efficiency rather than direct thermal comfort. Hence, “B” is the precise classification for manual thermostats and fans due to their specific functionality related to temperature regulation.