Restricted: This item is only approved for purchase by Business Accounts. The HONEYWELL fan and limit controller is designed for all types of forced air heating systems. Suitable for line voltage, low voltage, or millivoltage control applications. Manual fan switch overrides the fan setpoints to keep fan running continuously. Standard wire push-in terminals, female receptacles, and slotted wiring knockouts help speed installation. Rigid or swivel bracket mounting or surface mounting. Fan/Limit Control