What does "Open-Hi" mean for this model

This Carrier HN52KC053 Contactor is a heavy-duty 2-pole definite purpose contactor designed for reliable switching in high-demand HVAC and motor control applications

Verify your shaft diameter and lead length to ensure a rapid drop-in installation during field service calls

While a universal blower wheel may have similar dimensions

Protect your downstream regulators and automatic shut-off valves with the Maxitrol GF40-44-A-0

Nordyne 622685 Blower Motor R-410A What does "Open-Hi" mean forThe Nordyne 622685 Blower Motor is a high efficiency 1 HP blower assembly integrated with a factory programmed ECM control module. This 115V, 1075 RPM brushless DC motor is engineered for specific use in Nordyne, Intertherm, and Miller furnace systems, particularly the M7 series. Designed as a direct drop in replacement for obsolete part numbers 921652 and 622638, it restores proper static pressure performance and airflow modulation to the air