Tjernlund 950-4020 Combustion Air Intake Motor KitCombustion Air Intake Motor Kit from Tjernlund, model 950 4020, delivers reliable airflow for I I R combustion air intake equipment. With a 1 4 HP rating and a straightforward Type Motor Kit design, it ensures steady performance and easy installation. Designed for compatibility with I I R combustion air intake equipment, this kit features a durable motor and components engineered for long service life, dependable operation, and minimal maintenance. 1

model 51-102500-05

and millivolt systems and is compatible with NEC Class II installations

The model pairs with R45695-003 and carries the 57W78 designation

making it ideal for professional systems where consistent flow and fit are essential

Direct replacement part for Heil Quaker/ICP furnace systems

sealed enclosure to prevent moisture ingress

the valve uses a 1-1/2 inch inlet and 2 inch outlet with end connections male thread x female thread

green and yellow ground wire assembly

Voltage Rating: 370V AC (50/60 Hz)

reducing risk of continued unsafe operation

Armstrong 57W37 Fan and Limit Control is a dependable HVAC component engineered to regulate furnace operation safely

0917 LP To Natural Kit is designed to convert compatible Lennox furnaces from liquid propane to natural gas with precision and safety