Dual duct systems utilizing energy conserving fan controls with variable air volume (VAV) temperature control loops
Hot and cold air flow rates are delivered to meet space loads, while maintaining desired total air flow rates to the space
Pressure independent operation for precise air volume control of both hot and cold air flow
Configurable for both mixing and non-mixing applications with variable or constant total flow to the space
Maintain space temperature while maintaining air change rates or space pressurization, or meeting minimum ventilation rates.
Control strategies using pneumatic, analog, or direct digital control (DDC) systems to satisfy any application
Integral attenuator on Models DU1, DU1R, & DU-2
Compact Assembly with Models DU-3 & DU-4 (non-mixing applications)
Flow sensor arrangements available in the inlets of the air terminal, and a flow totalizing sensor at the discharge, based on control strategy.
Control sequence may be inlet sensing only (I sequences) or combination inlet total (I-T) sensing (one inlet sensor/one total sensor). Available with a variety of control sequences for mixing and non-mixing application.
Hot & cold round inlet sizes from 5" to 16" diameter – can be different sizes on the air terminal
Right or left hand hot inlet location
Flanged or Slip & Drive Discharge Duct Connections
Balancing taps / calibration chart included for field adjustment.
Steel control enclosure
Bottom access door (Patch plate, Double cam-lock, Hinged)
Model DU1R includes factory mounted 1, 2, or 4 row hot water coil
Electric duct heater (installed downstream of the terminal discharge)
1" thick glass fiber insulation, 1/2" or 1" foil-faced insulation (taped edges), 3/8" closed cell “fiber-less” insulation, Fiber-Lok system using 1" high density foil-faced lining with steel encapsuled cut edges (approved by the stringent California Office of Safety, Health, and Planning Department (OSHPD)