Carrier HH11AZ180 Vent Safety Switch

The Carrier HH11AZ180 is a vent-safety switch for Carrier HVAC-equipment only It protects the system by measuring airflow within the venting system. Some of the furnaces depend on adequate airflow to remove combustion products and ensure that they are safe to This switch operates similar to a safety guard using a sequencing or switching relay to shut down power to the furnace in case of low airflow. In the event of inadequate airflow the HH11AZ180 is a small but essential part of your Carrier HVAC system.