Lochinvar & A.O. Smith 100110820 1.42" Air Pressure Switch

The Lochinvar & A.O. Smith 100110820 is an air pressure switch with 1.42 inches in size and is utilized in HVAC systems, more specifically in gas-fired water heaters and boilers. This switch measures the air pressure in the system so as to make sure there is enough air to facilitate combustion. It works by making or breaking electrical contacts depending on the pressure levels that are measured to avoid such conditions as flue gas. This air pressure switch has the advantages of improved safety, energy saving and reliable operation to the performance of heating systems.