some fans in the greenhouse at cascade high school where I attend classes. a few don't work so they were not demonstrated. the one fan you see me hand start has a motor issue where it will not start on its own but will get going with assistance. the heaters are reznor and Dayton brands, there is no gas to the heaters, the Dayton's have timers but the reznor heaters have heat activated switches so I had to use jumpers to operate the larger fans. there are smaller inducer fans on top of the reznor heaters which were very badly seized up but I oiled them and got them going very nicely. the exhaust fans are ACME branded like the old roadrunner cartoons, they are the wind master and fan jet models. the fans here are INSANELY POWERFUL!!!!!!!

SAD UPDATE: this greenhouse has been demolished and everything is gone, there will not be any new videos on this greenhouse. RIP cascade high school greenhouse 1975-2017