10" 390 S-Blade Black Electric Fan - High Velocity Cooling Fan for Home, Office, Garage & Workshop - Quiet Powerful Air Circulation for Indoor & Outdoor Use

I use this fan on an auxiliary radiator, mounted under my F350 6.0, when I'm towing my boat. It has been on 2 trips to the Florida Keys this year, that is about a 700 mile round trip each time during June & July. It runs constantly during the trip. I use it while towing locally too, but those are short pulls and not a good test. It moves a lot of air.