Double Duct Air Terminal Unit - DD500

The Metalaire DD-500 air terminal units are designed to regulate the flow of conditioned air in a dual duct air distribution system. Both heated and cooled air are provided to the air terminal and mixed in a plenum provided by others to reach the desired discharge temperature.

Capacities ranging from 80-4,400 CFM in multiple units sizes
AHRI Certified, ETL listed, UL 1995, Complies with NFPA 90A and UL 181
Pneumatic, Electric, Analog, or Direct Digital Controls available
Unequal inlet sizes are available as an option

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- Damper rotates in a self-lubricating, long life, low friction thermoplastic bearing
- Industry leading continuous welded primary inlet duct to minimize leakage with three stiffening beads for added rigidity
- Mechanically fastened damper assembly shall be double layer, 18 gauge equivalent, galvanized steel with integral blade seal (<1% at 3.0" wg static pressure)
- Multi-quadrant, averaging flow sensor for highly accurate (+/-5%) flow readings with varying inlet duct configurations after certified balancer has balanced terminal
- Rectangular discharge with slip and drive duct connection
- 22 ga. galvanized steel casing, mechanically sealed for low leakage construction
- NEMA 1 rated control enclosure for both hot and cold decks with stand-off to prevent penetration of casing
- Full range of options and accessories available including liners, heating coils, access doors, attenuators, etc.
- All DD-500 terminal units are AHRI certified and shipped with the AHRI seal
Liners
- ½” or 1” 1.5lbs fiberglass
- ½”, ¾”, or 1” 1.5lbs foil faced
- ½” or 1” Thermopure closed cell foam
- ½” or 1” Fiberglass with solid metal double walled
Access Doors
- Damper
- Inlet sensor
- Hot water coil
- Electric heat
Other options available:
- 5 different control enclosures
- 4 different handing configurations
- 3 different outlet connections
- Hanger brackets
- 4 different transformers
- Custom options