Dasco fresh air louvers (DFL**1H) are considered as an architectural air inlets and outlets with a remarkable clean and aesthetically pleasing appearance. They are widely and successfully used for central air conditioning, ventilation and industrial ventilation systems. These louvers have a low resistance to air flow and high free area, making them a preferred choice for installations which require high air flow.
Dasco sand louver DSL**2H are architectural air inlets. They are widely used for building exteriors and are suitable for different HVAC
and industrial applications to prevent sand entry. The blades are carefully designed to provide a low resistance to air flow and a high free area.
Dasco sand trap louvers DSL*8X are designed for fresh air intake applications to separate air-borne sand and dust from the stream of
air. They are provided with a self emptying sand drain holes at the base. Blades are also arranged in a way to provide a low resistance
to air flow and a high free area.
Dasco pressure relief louvers DPRL**3 are widely used to maintain constant level of pressure inside pressurized rooms by relieving
excess air when it exceeds the desired limits. The blades are designed and positioned in such a way to permit automatic lifting to relieve the
pressure in the room and then to drop back to the closed position by gravity when the room pressure is normalized.
Dasco stationary drainable louvers DSDL**8H are considered as high performance louvers designed for both int a ke and e xhaus t
applications. The unique configuration of the louver blades gives them a remarkable drainable effect. These louvers are the most efficient in
minimizing water penetration. They are carefully designed to provide high free area, maximum resistance to rain with minimum resistance to
airflow.

Testing and Approval
Different samples from DASCO air terminal devices (Louvers) were tested at ITS (Inter tek Testing Services) labs in accordance with: