Seattle Park District Opengov #PW#2026-041

Seattle Charles Street Vehicle Maintenance HVAC and Ventilation Improvements

The City of Seattle is seeking a complete ventilation upgrade for the weld and body shops at its Charles Street Vehicle Maintenance facility. - Government buyer: City of Seattle, Public Works; administered by the Department of Finance and Administrative Services (FAS), Capital Development. - Project: Charles Street Vehicle Maintenance HVAC Improvements, PW#2026-041, at 805 S. Charles St., Seattle. - Named OEMs: Valent for makeup air units; Greenheck for exhaust fans; and BSE for ambient air cleaners. Each is specified as a model or approved equal. No reseller or installing vendor is named. - Equipment requested: - Three rooftop makeup air units: two MAU-1/MAU-2 units at 7,500 CFM each and one MAU-3 at 5,200 CFM. Specified model: Valent VX-212-0-1-F1. - One EF-4 rooftop exhaust fan, 5,200 CFM, Greenheck G-240-VG; and one EF-13 rooftop exhaust fan, 8,400 CFM, Greenheck RE2-30-615-VG. - Five suspended ambient air cleaners, 2,300 CFM each, BSE-AIRMAX-30HE. - Notable requirements: Makeup air units require MERV 14 filtration, electric-resistance heat, BACnet interfaces, and coordination with exhaust-fan interlocks. Air cleaners require three-stage filtration, including MERV 15 and HEPA filters. Exhaust fans include motor-operated dampers and BACnet interfaces. The scope also includes system integration, testing, balancing, commissioning, owner training, and warranty. - Estimated project value: The engineer’s estimate is $1,540,511. The bid schedule also includes a separate apprenticeship-incentive line item.

Description

The City of Seattle is seeking bids for HVAC improvements at its Charles Street Vehicle Maintenance facility. The work includes upgrading the existing exhaust fan system and installing a new makeup air unit to improve removal of noxious gases generated in the welding shop. Bids must be submitted electronically through OpenGov, and bidders must attend one of the two mandatory pre-bid site walks. The engineer’s estimate is $1,540,511, and the solicitation states a past WMBE utilization rate of 15% for this mechanical project.

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