La description

Dasco Supply Air Grilles & Registers (DG**5 and DR**5)are designed to suit HVAC applications where a high side wall or exposed duct is required, they are also used for adjusting airflow patterns of air-conditioned spaces and yet with an architectural appearance and curved – back frames, along with multi parallel and adjjustable blade type with aerofoil section of blades which allow a smooth and uniform airflow pattern for quiet and low pressure drop application. Adjustable horizontal, or vertical blades can be supplied to control the airflow pattern in either the horizontal or vertical planes. The frame is curved – back as standard and can be supplied in flat form as optional.
Dasco Return Air Grilles & Registers (DG**4 and DR**4) are multi parallel fixed blade type. Blades have aerofoil sections and are fixed at *5º angle, which will allow smooth and uniform airflow pattern for a quiet and low-pressure drop applications. Grilles can be supplied in horizontal blades (DG**4 H) or vertical blades (DG**4 V) and the blades are slightly overlapped to prevent any seethrough.
Dasco Egg Crate Grilles & Registers (DG**7 and DR *7) are designed to suit HVAC appplications where a high sidewall or exposed duct is required. With there maximum free area and minimum see – through, they are mainly applicable when high air volume at low pressure is desired. Their attractive appearaance makes them suitable for other architectural and decorative applications.
Dasco Door Grilles (DDR***0) are non-vision door grilles but can be used as transfer grilles for walls and partition openings, with an atttractive appearance. The DDR***0 is a heavy duty type for mass activity areas such as gymnasiums… etc. DDR***0 is constructed of a main frame including the core of V-bars and an auxiliary frame for thickness adjustment from *3mm to *5mm. DDR***0S having the same construction but with mullions (supporting bars) set at regular intervals to give strength and rigidity to the grille, this type can also be equipped with opposed blade damper for air volume control (DDR***0SD). Door grilles can be provided with fly screen fixed on main frame as optional.

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

• Air diffusion council test code for grilles, registers and diffusers No. ADC ***2:GRD**4.
• ISO ***9 “Air distribution and air diffusion laboratory aerodynamic testing and rating of air terminal devices”.
• ANSI/ASHRAE ******1, “Method of testing for rating the performance of air outlets and inlets”.