XG-TH-500 Series

Model XG-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 a rectangular outlet. The primary function is to regulate airflow to an occupied space. The XG-TH-500 can come with a heating coil on the discharge of the unit to provide for reheat, when necessary.



Model XG-TH-500 is the simplest and most widely used variable air volume (VAV) terminal unit. Its primary function regulates airflow to an occupied space.

Capacities ranging from 80-7,270 cfm in 10 sizes.

Pneumatic, electric, analog, or direct digital controls available.

Hot water or electric heat available for reheat applications.

Product Features:

  • 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 in. wg static pressure)
  • All metal constructed inlet flow sensor with extra balancing taps
  • Rectangular discharge with slip and drive duct connection
  • 22-gauge 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



Complies with NFPA 90A and UL 181

UL 1995

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