Single Duct Air Terminal - Integral Attenuator - TH-500

The Metalaire model TH-500 is the simplest and most widely used VAV terminal unit. Its basic components are an insulated sheet metal box, round inlet damper, flow measuring device and rectangular outlet. Their primary function is to regulate airflow to an occupied space. When necessary, the Metalaire TH-500 can be provided with a heating coil on the discharge of the unit to provide for reheat.

Capacities ranging from 80-7,270 CFM in 10 sizes
AHRI Certified, ETL listed, UL 1995, Complies with NFPA 90A and UL 181
Pneumatic, Electric, Analog, or Direct Digital Controls available
Hot Water or Electric Heat available for reheat applications

Specification

- 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)
- All metal constructed inlet flow sensor with extra balancing taps
- Rectangular discharge with slip and drive duct connection
- 22 ga. galvanized steel casing, mechanically sealed for low leakage construction
- NEMA 1 rated control enclosure with stand-off to prevent penetration of casing
- Full range of options and accessories available including liners, heating coils, access doors, attenuators, etc.
- All TH-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
- Multiple how water coil options
- Multiple electric heat options
- Custom options