Reduce heat stress and improve air quality with Schaefer's uniquely designed circulation fans. These fans are engineered to produce greater air movement and superior cooling no matter the application. Also known as Horizontal Air Flow (HAF) fans, these fans move air in a coherent horizontal pattern creating a gentle 'racetrack' air flow pattern needed in greenhouses to maximize heat distribution and humidity control by mixing the air, from ceiling to floor. Deep guard design for unmatched performance, low noise levels and safety without sacrificing airflow. Matching high quality motors and blades for maximum efficiency. Powder coated steel guards and bracket for increased durability and corrosion resistance. Comes with 5 ft 120 volt power cord not wired, except 737600 is wired.