Non-tempered make-up air units

NTS non-tempered make-up air units are available in four housing sizes incorporating eight blower sizes (9" through 20" single blowers and 18" through 20" twin blower units) with air flow capacities from 600 to 30,000 CFM and total static pressures up to 4" w.g.

Standard Construction


    • Heavy-gauge weatherproof galvanized steel housing
    • Down discharge
    • 1" thick 3# density fiberglass insulation
    • Large gasketed access panels with draw tight tooled fasteners
    • Heavy-gauge base frame with lifting lugs
    • Intake hood with bird screen
    • V-bank filter rack
    • 1" permanent filters


    • Forward curved double width, double inlet blowers
    • Statically and dynamically balanced blower wheels
    • Precision machined shafts and sealed ball bearings
    • Adjustable motor mount and drives with belt selected for 165% of motor horsepower
    • NEMA frame ODP motor
    • Three phase 1 HP and above motors are EPACT high-efficiency rated
    • Blower and motor mounted on vibration isolators


    [object Object]
    [object Object]
    [object Object]


    NTS Non-tempered Make-up Air Unit
    [object Object]
    [object Object]
    [object Object]
    NTS Roof Curb Arrangements
    [object Object]
    [object Object]
    [object Object]

    Other Information

    Options & Accessories


      • Standard intake with flat filters
      • Extended intake with flat filters
      • Flat filter section in intake hood
      • Delete intake hood
      • Foil faced insulation
      • Double wall insulation
      • Painted housing
      • Stainless steel housing
      • End discharge
      • Top discharge
      • Duct adaptor
      • Four-way discharge head
      • Floor rubber in shear isolators
      • Hanger spring isolators
      • Vertical unit
      • Equipment stand for vertical unit


      • 2" permanent filters
      • 1" disposable filters
      • 2" disposable filters
      • 2" 30% filters


      • TEFC
      • Two speed, two winding
      • Two speed, one winding (three phase)
      • Premium efficiency (three phase)


      • Low leakage opposed blade damper
      • Two position spring return actuator
      • Intake or discharge mounting
      • End switch
      • Return air damper with numerous actuator options


      • Fan disconnect switch (non-fusible or fusible)
      • Single point pre-wired motor control center with main fusible disconnect, starter(s) and fused transformer (located within unit or remotely)
      • Exhaust fan starter
      • Remote control panel
      • Remote control panel with indicator lights
      • Low temperature limit switch (freeze stat)
      • Clogged filter switch with indicator light
      • Convenience outlet (service receptacle)
      • Time delay relay
      • Time clock (seven day)
      • Smoke detector
      • Variable air volume with frequency drive

      Contact the factory for any other options or accessories not listed.