Product Description

Overview

The INDEECO TRIAD Series is a rugged, washdown and corrosion-resistant electric unit heater designed for industrial and commercial spaces that demand NEMA 4X protection and reliable performance in wet, harsh, or chemically aggressive environments. All models include built‑in controls in a NEMA 4X enclosure and are suitable for wall or ceiling mounting in non-hazardous areas.


Key features

  • NEMA 4X washdown / corrosion‑resistant construction for wet and corrosive industrial environments

  • Finned tubular 316 stainless steel heating elements with stainless steel fins and heavy stainless housings and grilles

  • Totally enclosed, epoxy‑coated motor with aluminum fan blade, factory-wired to NEMA 4X control enclosure

  • Built‑in controls: automatic reset overtemperature cutout, 24 V control transformer, fan delay relay, contactors, and terminal block

  • Swivel mounting bracket included for standard wall or ceiling mounting; threaded-rod ceiling mounting optional

  • Single-point line voltage connection for 208, 240, 480, and 600 V heaters


Models included in this listing (480 V & 120 V)

Choose the kW and voltage that matches your application. All models below are washdown / corrosion-resistant TRIAD Series unit heaters with 24 V control.

Catalog # kW Voltage / Phase Amps Air Volume (CFM) Air Throw Notes
234-U11R-0020B 2 kW 120 V, 1φ 21 A 700 CFM 26 ft Small spaces
234-U11N-0030U 3 kW 480 V, 3φ 5 A 700 CFM 26 ft 480 V, Size 1
234-U11N-0050U 5 kW 480 V, 3φ 8 A 700 CFM 26 ft 480 V, Size 1
234-U11N-0080U 7.5 kW 480 V, 3φ 11 A 700 CFM 26 ft 480 V, Size 1
234-U11N-0100U 10 kW 480 V, 3φ 14 A 1450 CFM 43 ft 480 V, Size 1
234-U11L-0150U 15 kW 480 V, 3φ 20 A 2400 CFM 50 ft 480 V, Size 2
234-U11A-0250U 25 kW 480 V, 3φ 32 A 2400 CFM 50 ft 480 V, Size 2

Additional voltages (208, 240, 277, 347, 600 V; 1φ and 3φ) are available in the TRIAD Series — contact us for a quote if you do not see your required voltage in the selector.


Dimensions, airflow, and mounting

Frame sizes and dimensions (all measurements approximate):

kW Range Frame Size X (Width) Y (Height) Z (Depth) Net Weight
2–7.5 kW Size 1 15.5 in 21.5 in 13 in 56 lb
9–12 kW Size 1 15.5 in 21.5 in 13 in 56 lb
12.5–47 kW Size 2 26 in 28 in 20 in 115 lb

Airflow performance:

kW Range Air Volume Air Throw Outlet Velocity
2–7.5 kW 700 CFM 26 ft 760 FPM
9–12 kW 1450 CFM 43 ft 1575 FPM
12.5–47 kW 2400 CFM 50 ft 1200 FPM

Recommended maximum mounting heights (to bottom of heater):

kW Range Max Height from Floor
≤ 5 kW 10 ft (3.0 m)
5.1–10 kW 15 ft (4.6 m)
10.1–20 kW 20 ft (6.1 m)
20.1–47 kW 25 ft (7.6 m)

Standard mounting uses the included swivel bracket for wall or ceiling mounting; optional mounting via four 3/8‑16 threaded rods is also supported. Maintain at least 6 ft from the floor and 8 in from walls or ceiling.


Factory options (available by request)

These TRIAD units can be factory‑configured with additional built‑in options (lead time and pricing may change).

  • Disconnect switch (Code D)

  • “Heater On” pilot light (Code L)

  • 3‑position selector switch (heater / standby / fan) (Code S)

  • Built‑in thermostat (40–100°F or 40–120°F; single- or 2‑stage with option X) (Code T / X)

  • Secondary manual reset overtemperature cutout for elevated safety (Code M)

  • 120 V control circuit, fused and grounded (Code V)

  • Epoxy painted stainless components, Monel elements, fan motor fusing, and other corrosion/controls options

Remote NEMA 4X wall‑mounted thermostats are also available as accessories (catalog #1004328 or #1026347).


Applications

  • Food & beverage processing

  • Washdown production areas

  • Wastewater and water treatment facilities

  • Chemical and pharmaceutical plants (non‑hazardous zones)

  • Dairy, livestock, and agricultural processing spaces

  • Any indoor industrial area requiring NEMA 4X washdown electric unit heat


Lead time

  • TRIAD 234 Series heaters (Assembly Stock / Availability Code AS): typically 2 weeks from order acknowledgement.

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