Arlington County #N1490,1

Fire Station 8 Roof-Mounted Air Handling Unit Replacement

Arlington County is seeking a replacement HVAC system for Fire Station 8, including related building modifications. - Government buyer: Arlington County; work location is Fire Station 8 in Arlington, Virginia. - Requested equipment: One new 30-ton roof-mounted air handling unit. No manufacturer, OEM, vendor, or part number is specified. - The unit must maintain 68°F and 50–60% humidity continuously, 24 hours a day, seven days a week. - Include an enthalpy wheel to recover heat and moisture from toilet and bath exhaust air and transfer energy to incoming outdoor air. - Associated work: Remove the existing 25-ton unit; install the replacement; complete minor structural reinforcement and ductwork modifications; replace acoustical ceiling tile in the Day Room and part of the adjacent Corridor; and adjust sprinklers for the new Day Room ceiling height. - Site considerations: The building has steel-frame construction and an EPDM roof. - Named OEMs and vendors: None identified in the provided information.

Description

Replace the existing roof-mounted 25-ton air handling unit at Fire Station 8 with a new 30-ton unit that meets the revised standard of 68°F at 50–60% humidity, 24 hours a day, seven days a week. Work includes removing and replacing the unit, minor structural reinforcing and ductwork modifications, and replacing acoustical tile ceiling in the Day Room and part of the adjacent Corridor. The new unit's enthalpy wheel will transfer sensible and latent energy from toilet and bath exhaust air to incoming outdoor air, and sprinklers must be adjusted to the new Day Room ceiling height. The building is a three-story steel-framed structure constructed to the 2015 Virginia Uniform Statewide Building Code, with a single-ply, fully adhered EPDM roof.

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