Arlington County #N1490,2

Fire Station 8 30-ton air-handling unit replacement and building modifications

Arlington County is seeking replacement of the HVAC air-handling unit at Fire Station 8 and related building work. - Buyer: Arlington County; project site is Fire Station 8 in Arlington, Virginia. - OEMs and vendors: No manufacturers, OEMs, brands, or vendors are named in the opportunity. - Equipment: One new roof-mounted 30-ton air-handling unit to replace the existing 25-ton unit. The unit must include an enthalpy wheel that recovers sensible and latent energy from toilet and bath exhaust air for incoming outdoor air. - Operating requirements: Maintain 68°F and 50–60% relative humidity continuously, 24 hours a day, seven days a week. - Associated work: Remove the existing unit; provide 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 ceiling height. - Building context: The station is a three-story, steel-framed building with a fully adhered single-ply EPDM roof.

Description

The project replaces Fire Station 8’s existing roof-mounted 25-ton air handling unit with a new 30-ton unit, including removal, installation, and minor structural reinforcing. The new unit is intended to meet the revised standard of 68 degrees at 50–60% humidity continuously and uses an enthalpy wheel to improve energy efficiency by transferring energy from exhaust air to incoming outdoor air. Work also includes minor ductwork modifications, replacement of acoustical ceiling tile in the Day Room and part of the adjacent Corridor, and adjustment of sprinklers to the new Day Room ceiling height.

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