Greenhouse Circulation Fan prop65 The u-shaped design allows for

The u-shaped design allows for smooth installation

Door horizontal braces (3)

Designed to work with 1020 heavy-duty trays

5052 light

Greenhouse Circulation Fan prop65 The u-shaped design allows for12" HAF (Horizontal Air Flow) Circulation Fan Promote uniform temperatures and reduce heat stress with these greenhouse circulation fans. Installing a ventilation system can increase air quality and improve the efficiency of heating and cooling systems. Horizontal Air Flow (HAF) fans work to move air in horizontal patterns creating a circular airflow pattern needed in hoop houses to maximize heat distribution and humidity control by mixing the air