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Ruggedized Environmental Control Unit (RECU)

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Mainstream’s 5-tonR RECU is the latest in ultra-efficient, military-ready, ducted, unitary, heat pump systems. It provides heating, ventilation, and air conditioning to USAF BEAR Base shelters. The RECU is compatible with NBC filter/blower equipment and is certified to operate with Collective Protection (ColPro) equipment in a chemical, biological, radiological, and nuclear (CBRN) environment. The RECU also includes compressor soft-start technology and microprocessor-based embedded diagnostics/prognostics. These units were designed to replace the FDECU, LECU, and the IECU while improving performance, reducing weight, simplifying maintenance, and increasing reliability. Optional wye ducts are available, allowing one RECU to cool two shelters.

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Ordering Information
Part # RECU60K134
On GSA Contract Yes
USAF Part # E2CU60K3208
NSN-USAF Pending
L x W x H 61″ x 42″ x 38-1/4″
Weight 647 lbs
Service Life 25 years
Recommended Inspection Interval 36 months
Duct Diameter 16″
Duct Length 8′
Noise 79 dBA
Input Power 208/230 VAC, 3 phase, 50/60 Hz
RECU Breaker Rating 50 A
Cable 25′ SOOW
Connector Class L MS90556C32412P
Evaporator Air Flow 2000 scfm @ 1 in.H2O
Soft Start Yes
Type R-134a/HFO Compatible
Charge 12 lbs
Cooling (@ 125/90/75°F) 68,000 Btu/hr
Heating (Electric) 35,600 Btu/hr
Heating (Heat Pump) Yes
Operator Controls
Digital Remote Thermostat Yes
Digital Diagnostics and Prognostics Yes
Digital Display Yes
Microgrid Compatible Yes
Operating Temperature Range
Cooling 50°F to 125°F
Heating -25°F to 75°F
Approved For
463L Pallet Transport Up to 6 Units
Tricon Transport Up to 4 Units
BEAR Compatible Yes
Collective Protection (ColPro) Certified Yes
NBC Filter/Blower Equipmnet Compatible Yes
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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone: 321-631-3550
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Improved Environmental Control Unit (IECU)

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Mainstream’s modular Improved Environmental Control Units (IECUs) provide heating and cooling to troop shelters, containers, vehicles, and communications enclosures in ambient temperatures as high as 140°F and as low as -50°F. The IECU is available in three different nominal cooling capacities (9,000, 18,000 and 36,000 Btu/hr) with multiple power input options. Designed to replace legacy R-22 based ECUs, the IECU features improved energy efficiency, lighter weight, and easier maintenance. The IECU uses environmentally safe R-410A refrigerant and meets or exceeds all requirements for military heating and cooling.

    • Designed for Military Environment
    • Simple and intuitive control panel
    • No Training required for basic operation
    • Software upgradable PCB controller with battle-short capability
    • Removable remote provides for control at a convenient location
    • Designed for maintenance or repair with common hand tools from standard military tool kit.
    • Diagnostics Port allows complete troubleshooting with only a multimeter
    • Embedded diagnostics and 16 board-mounted LED indicators simplify maintenance
    • Plug and play modular components
    • Brazing/soldering not required during any maintenance procedure
    • All refrigerant components have threaded O-ring fittings that can be replaced with simple hand tools
    • Soft start device helps protect tactical power grids by limiting in rush current at start up.
    • EMI conducted and radiated emissions tested to MIL-461F
    • Designed for 20 year storage life
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IECU Specifications
9K 115 VAC 1-Phase
18K 230 VAC 1-Phase
18K 208 VAC 3-Phase
36K 208 VAC 3-Phase
Cooling (BTU/hr) @125F ambient
Heating (Watts)
Power (KW) @125F
Weight (Lbs)
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Operating Hours: Monday – Friday 8:00 a.m. – 5:00 p.m. EST

Contact: Send us an email – militarysales@mainstream-engr.com
Phone:  321-631-3550
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