Basic Expeditionary Airfield Resources (BEAR) Environmental Control Unit (ECU)

This Request for Information (RFI) Questions & Answers (Q&A) document provides official clarifications regarding the requirements and technical specifications for the Next Generation Environmental Control Unit (NGECU) solicitation. The final Product Description (PD) and Statement of Work (SOW) serve as the governing documents, superseding the Requirements Correlation Table. Key technical requirements and clarifications established in the document include: - **Fasteners:** The use of any style of rivet nuts, clinch nuts, jack nuts, threaded inserts, or cage nuts is strictly prohibited in blind holes to prevent premature failure. Fasteners must be threaded directly into the base material. - **Pallet Configuration:** The standard 463L pallet pack-out configuration (12 ECUs per pallet, stacked three levels high) is mandatory. Alternative configurations are not accepted. - **Weight Limits:** The maximum gross-weight threshold is capped at 650 pounds (with a desired weight of 600 pounds), measured with a full refrigerant charge in operational configuration. - **Noise Levels:** Operational noise must not exceed 80 dB(A), with 75 dB(A) or less identified as the desired target. - **Storage and Durability:** Units must withstand storage temperatures ranging from −65 °F to +160 °F and maintain a minimum life expectancy of 25 years. - **Retractable Legs:** The requirement for retractable or foldable legs remains mandatory to ensure a minimum operational ground clearance of four inches while optimizing space during transit and storage.

This document outlines the Requirements Correlation Table for the Basic Expeditionary Airfield Resources (BEAR) Environmental Control Unit (ECU), dated April 11, 2025. It details the threshold and objective technical specifications required for the procurement of a heat-pump-based military environmental control system. Key physical requirements include strict dimensional limits for air and surface transport configurations, a threshold weight of 675 pounds (objective: 600 pounds), 16-inch supply and return ports, and collapsible insulated ducts. Operationally, the ECU must operate in extreme temperatures ranging from -25°F to +125°F, function on slopes up to 10 degrees, and withstand harsh environmental conditions—such as blowing rain, sand, salt fog, and solar radiation—in compliance with MIL-STD-810. Functionally, the unit must deliver a minimum of 60,000 BTU/hr of cooling and 40,000 BTU/hr of heating. It must operate on 3-phase, 208/230 VAC power, incorporating soft-start technology to limit inrush current. Control features include a digital interface and a 25-foot tethered remote thermostat. Logistically, the ECU is designed for a 20-year service life and transportability via C-130 aircraft under MIL-STD-1791. Maintenance protocols prioritize ease of service, requiring no special tools or external computer diagnostic interfaces. The external chassis must feature a non-CARC, thermal-reflective Sand Matte coating.

This federal purchase description (PD25WRROZ001) details the technical, performance, and verification requirements for a 5-ton (60,000 Btu/hr) Expeditionary Environmental Control Unit (ECU). Designed primarily for cooling and heating military shelters, the electric-motor-driven heat pump configuration includes integrated supplemental resistance heating, flexible insulated ducts, and a 25-foot detachable power cable. Key physical and operational requirements include a 208VAC, 3-phase, 50/60 Hz electrical interface, a maximum weight of 650 pounds, and a stackable, tool-free setup design. The unit must operate reliably in extreme conditions, withstanding storage temperatures from -65°F to +160°F and altitudes up to 10,000 feet. It must also resist environmental factors like rain, solar radiation, fungus, salt fog, sand, and dust. To facilitate transportability, the ECU's dimensions must be optimized for loading into Tricon ISO containers and onto standard 463L military air pallets. Maintenance requirements dictate a 20-year service life, a Mean Time To Repair (MTTR) of under two hours using standard HVAC toolkits, and an interface that does not require external computers for troubleshooting or software updates. The document outlines a strict verification matrix. It mandates first article testing on 12 sample units and quality conformance inspections—including run-in and refrigerant leakage tests—on all production units to ensure compliance with military standards (such as MIL-STD-810, MIL-STD-1472, and MIL-STD-130) before government acceptance.

This Request for Information (RFI) serves as a follow-up to a previous Sources Sought Synopsis for the Next Generation Environmental Control Unit (NGECU). Having refined its technical requirements, the U.S. Air Force is seeking specific hardware and procurement details from interested vendors to finalize its acquisition strategy. Respondents must provide details on their proposed solutions across three key areas: 1. **Hardware Identification:** Specific unit names, part numbers, and National Stock Numbers (NSN) for equipment meeting the requirements. 2. **Required Modifications:** Details on any base units that would require modifications to meet the updated specifications, including the exact changes needed. 3. **Contract Vehicle Availability:** Information on whether the proposed units are currently available on active government contract vehicles (such as GSA, SEWP, DLA, or CHESS) or are scheduled to be added within the next four months. Responses must be submitted via email to Contracting Officers Wesley Hardy and Douglas Lindsey, and Contract Specialist Allison Haney, by the close of business on September 18th, 2026.