Lochinvar & A.O. Smith 100189054 Collar 30067439-890 Common Questions: What is the

Common Questions: What is the primary function of the C12-2001 in a heat pump system

with a factory default typically set at 10:1 for standard responsiveness

One port typically monitors the positive pressure from the blower while the other senses the negative pressure (vacuum) in the combustion box

Enhanced Filtration: The MERV 11 rating ensures the removal of over 85% of particles between 3

the ST9120U1011 provides adjustable heat fan on delay (30 or 60 seconds)

Lochinvar & A.O. Smith 100189054 Collar 30067439-890 Common Questions: What is theThe Lochinvar & A. O. Smith 100189054 Collar is a precision engineered 4" flue collar essential for maintaining the structural integrity of high efficiency venting systems. As an OEM component, this kit provides a secure, gas tight transition between the appliance and the exhaust infrastructure, preventing hazardous leaks and ensuring optimal draft performance. This specific part is a direct replacement for legacy units, as 100189054 is identical to