Unlike standard cowl designs that deflect air downward or sideways, a Jet Cowl is specifically engineered to eject exhaust air vertically in a powerful, upward-directed jet. By utilizing high discharge velocity, the cowl shoots contaminated air high above the roofline, allowing it to be safely dispersed by higher atmospheric wind currents. Key Benefits for Your Facility Eliminates Air Re-Entrainment: Because the exhaust is propelled forcefully upward, the risk of "short-circuiting" your ventilation system is virtually eliminated. The ejection is so effective that you can safely install a fresh air inlet in the immediate vicinity of the exhaust hood without taking any extraordinary or costly precautions. Prevents Roof Soiling and Damage: Standard exhaust hoods often allow airborne oils, grease, moisture, and chemical residues to settle on the surrounding roof. Over time, this causes unsightly staining and accelerates roof degradation. Jet cowls keep the immediate rooftop clean and free of contaminants. Intelligent Weather Protection: A common concern with vertical discharge is rain entry. Jet cowls solve this seamlessly. They feature integrated internal drainage channels or co-axial cones. When the fan is running, the air velocity keeps rain out; when the system is off, any captured rainwater is safely directed to an internal drain and onto the roof, never entering your ductwork.
