Air circulation fan for circulating the air inside the greenhouse.
Types of ventilation and fans for horticultural greenhouses
Multifan Greenhouse Fan
Greenhouse Shutter Mount Exhaust Fans - Bootstrap Farmer
Amazon.com: Schaefer VK8 Versa-Kool 8" Deep Guard Greenhouse Circulation Fan, Made in USA, Horizontal Airflow, 1/100 HP, 450CFM, L-Shape Mount Included, White : Patio, Lawn & Garden
Horizontal Air Flow Systems | Integrated Pest Management
Amazon.com: Schaefer VK12 Versa-Kool 12" Deep Guard Greenhouse Circulation Fan, Made in USA, Horizontal Airflow, 1/10 HP, 1470CFM, L-shape Mount Included, White : Patio, Lawn & Garden
Variable Speed Greenhouse HAF Circulation Fans from ACF Greenhouses
Greenhouse HAF Circulation Fans - 14" 3 Speed Fan from ACF Greenhouses