Lochinvar & A.O. Smith 100109934 Blocked Outlet Switch

The Lochinvar & A.O. Smith 100109934 is a Blocked Outlet Switch, safety device specifically for blocked exhaust outlet in HVAC equipment such as water heaters and boilers. This switch controls the circuit which manages the proper venting of bad gases out of the system. When they sense blockage, the switch is able to turn off heating system to avoid instance where the operating conditions are dangerous for users and/ or damaging to equipment. Its performance increases safety and efficiency making it a critical element in meeting safety requirements and achieving the best performance in residential and commercial heating applications.