While these are factory-calibrated

The 01UT-5M uses the 10k3 (Precon) curve

maintaining combustion efficiency and preventing safety lockouts related to poor venting performance

64 Amps reduces energy consumption and heat generation

Heat Controller 12100102000001 Blower Wheel 320074-702 While these are factory-calibratedThe Heat Controller 12100102000001 Blower Wheel is a precision engineered centrifugal fan component designed for high static pressure applications within commercial and industrial HVAC systems. This OEM replacement blower wheel is critical for restoring factory spec airflow in Heat Controller air handlers and packaged units. Constructed with heavy duty galvanized steel or aluminum, it features balanced housing and blades to minimize vibration and