Engineering Design - Fan Wall Replacement Project WGB | BWC260595 | FY26 | JD

Provide comprehensive engineering design services for retrofitting existing air handling units (AHUs) with a modern fan wall system, including full replacement of hot water and chilled water coils, in a 33-story commercial high-rise. The goal is to improve HVAC performance, energy efficiency, and system redundancy while minimizing operational disruption. HVAC Load Calculations: Full-building heating/cooling analysis, internal heat gains, summary report by floor and zone. Site Investigation: Multiple site visits, document mechanical rooms, verify as-built conditions. Fan Wall System Design: EC motor arrays, VFD-driven fans, duct transitions, electrical coordination, coil replacement with AHRI-certified hot water and chilled water coils. Phasing & Implementation Strategy: Maintain HVAC operation during installation, crane access, rigging paths, temporary solutions. Cost Estimating: Estimate including fan wall equipment, structural modifications, electrical upgrades, demolition, installation labor, coil replacement costs. Review & Coordination: Present findings, incorporate feedback into final design documents. A MANDATORY site visit will be conducted at: William Green Building. 30 W Spring Street, Columbus OH 43215 Site Visit Date: Thursday, January 29, 2026 Site Visit Time: 10:00 am – 12:00 pm/Noon EST Only suppliers that have attended the site visit will be eligible for award selection. **Review the Attached Document "SOW - Fan Wall William Green Building – 33-Story Building, Downtown Columbus"** **SOW - Estimated Pricing Breakdown document attached must be filled out and submitted with your proposal. Bidder must be registered with Ohio Buys and have received a payee/supplier ID. If unsure, you can verify at https://ohiopays.ohio.gov/ Pricing must remain valid for a minimum of 90 days.