The Department of Housing and Urban Development has a requirement for the Air Handling Unit (AHU) Replacement Project.

The Robert C. Weaver Federal Building (Weaver Building) houses the U.S. Housing and Urban Development (HUD) located at 451 7th and D St SW, Washington, DC. The HUD building was constructed in the 60’s and completed in 1967 as part of the District of Columbia’s Southwest Urban Renewal Plan. It has 10 above-grade floors, two basement levels and three levels of underground parking. This building was added to the National Register of Historic Places in 2008. It has 1,331,935 GSF and 1,121,922 RSF of space. Environmental services for space conditioning are provided by central station air handling units served by central chilled water and heating hot water plants in the penthouse of the building. Most of the air handling units are original to the building.

The 14 AHUs (totaling appr. 881,000 CFM of airflow) are original to the building, constructed in 1968, and do not meet the current ASHRAE standards for indoor air quality. Ten (10) units are located in the Penthouse, three (3) units in the sub-basement, one (1) unit is in the basement. The existing air filtration system is outdated and poses significant challenges in providing proper air circulation and maintaining healthy air quality throughout the building. The air filtering system was designed for Minimum Efficiency Reporting Values (MERV) 8 & 10. Current guidance from the Centers for Disease Control and Prevention recommends that all building systems meet ASHRAE Standard 62.1: Ventilation for Acceptable Indoor Air Quality. ASHRAE Standard 62.1 was published in 1973, while the Weaver Building was built in 1968.

The new AHUs would include modern equipment designed per ASHRAE 62.1Ventilation and Acceptable Indoor Air Quality. Units must be integrated into the building’s existing electrical, mechanical, plumbing and fire alarm systems. Removal of existing equipment and accessories and installation of new AHUs shall overcome logistical constraints via detailed phase planning with GSA and HUD as well as the hybrid installation of both modular factory built and factory site-built AHU equipment.

• This procurement would require a Design-Build contractor teaming with an Architect and Engineering (A/E) firm for design-build construction services in the removal and replacement of fourteen (14) AHUs including, but not limited to, associated mechanical appurtenances, electrical infrastructure, controls, fire alarm, ductwork, and insulation that are beyond their life expectancy