Mainstream Fluid & Air LLC

Mainstream Fluid & Air LLC, a for-profit limited liability company based in Berkeley Heights, New Jersey, manufactures and supplies HVAC cooling coils, heat exchanger components, and related chilled-water and air-conditioning equipment to federal civilian agencies as a prime contractor exclusively on small-dollar purchase orders with no set-asides. The vendor operates entirely in the prime role (100% of awards) and competes under full-and-open conditions across refrigeration and air-conditioning equipment manufacturing (primary NAICS 333415) and heat exchanger manufacturing (PSC codes 4421 and 4430).

Mainstream's customer concentration is heavily skewed to two agencies. The Department of Veterans Affairs Veterans Integrated Service Network 2 dominates recent activity, accounting for 12 awards worth $286 thousand combined potential value — about 26% of all awards but 63% of combined potential value in the top-five customer block. The Federal Correctional Institution Edgefield (Department of Justice Bureau of Prisons) follows with 5 awards valued at $51 thousand. Together, these two customers account for 59% of recent awards by count. Beyond that concentration, the vendor serves the Department of the Army, Department of the Navy, Department of the Interior, GSA Federal Acquisition Service, the Smithsonian Institution, and the Department of the Treasury Bureau of Engraving and Printing across 20 distinct customer agencies. One GSA Federal Supply Schedule (GS07F0021X) frames 3 task orders worth $123 thousand of the $1.1 million combined potential value across the full footprint.

Recent representative work includes a $97 thousand sole-source purchase order from the Bureau of Engraving and Printing (July 2026) for heat exchanger replacement parts serving a DC currency facility, a $22 thousand firm fixed-price award from Federal Correctional Institution Edgefield (August 2026) for mainstream coil equipment, and multiple $29 thousand to $46 thousand cooling coil and chilled-water coil deliveries to VA VISN 2 throughout 2024–2025. A $34 thousand HVAC cooling coil component for VA VISN 2 (July 2025) and $33 thousand cooling coils order (June 2024) exemplify the vendor's standard engagement pattern: single, specialized HVAC components or small repair work priced in the $12 thousand to $97 thousand range, delivered to facility maintenance operations at federal hospitals, correctional institutions, and administrative buildings.

Activity has been modest and stable — 1 to 4 awards per year over the last five years, with only one award ($97 thousand from the Bureau of Engraving and Printing) completing in the next twenty-four months and therefore subject to recompete. The combined federal obligated amount is $982 thousand against potential value of $1.1 million, reflecting a mature, repetitive-order vendor with predictable cash flow but minimal upside growth signal. No subcontract activity appears in the source.