What does a power choke do in a Lennox furnace

This component is frequently used in ICP 80% and 90% AFUE furnaces

this unit is designed strictly for vertical wall mounting with the airflow directed downward

As a direct replacement for the Lochinvar TST20015

This model is typically the controller head and sensing element

Resideo ZD18X20TZ Damper 318973-401 What does a power chokeThe Resideo ZD18X20TZ is a heavy duty rectangular parallel blade zone damper designed for precision airflow control in residential and light commercial forced air systems. Built with a robust extruded aluminum frame and blades, this 18 inch by 20 inch unit features riveted and screwed corners for maximum structural integrity. The parallel blade design, combined with high quality extruded blade seals, ensures low leakage performance and quieter