Gas Heat ESCO Practice Exam

A dedicated vent system is a system that is specifically designed and installed for a single appliance, such as a furnace. In this case, the fire stop support plate is located at the furnace base because it acts as a barrier to prevent fire and smoke from spreading in case of a fire. Placing it at the furnace base also allows for easy access and maintenance of the vent system. The other options, such as next to an exterior wall, under the vent cap, or where a vent passes through a ceiling, would not be ideal locations for a fire stop support plate as these areas may not provide sufficient protection or ease of access.