Power Exhaust Fan For LGH/LCH/KG/KC/KH 092-152 Units Installs internal to unit for downflow applications only with economizer option Provides exhaust air pressure relief Interlocked to run when supply air blower is operating, Fan runs when outdoor air dampers are 50% open (adjustable) Motor is overload protected Fan is 20 in. diameter 5-Blade 1/3 hp motor NOTE - Requires Economizer and Downflow Barometric Relief Dampers. Includes: Power exhaust assembly Bag assembly containing: #10 Sheet metal screws; #12 Sheet metal screws K65 exhaust fan relay (3) Harnesses