# Douglas County Ionwave #CI-2026-0141 Addendum 1 (OPW 55002)

Willa Cather Library HVAC Replacement and Electrical Modernization

**Posted:** October 21, 2026
**Respond By:** November 18, 2026
**Identifier:** CI-2026-0141 Addendum 1 (OPW 55002)
**NAICS:** 238220

The City of Omaha Public Works Department is seeking a contractor to replace the Willa Cather Library’s HVAC system and modernize its electrical systems.
- **Buyer and location:** City of Omaha, through Douglas County Purchasing and the Public Works Department; work is at the Willa Cather Library in Omaha. The Human Rights and Relations Department administers the Economic Sustainability Program requirements.
- **Named manufacturers and vendors:** **Daikin** (AHU and condensing unit), **Riello** (boiler), **Spirotherm** (air separator), **JL Wingert** (glycol make-up tank), **Taco** (expansion tank), and **Greenheck** (fans). The drawings also name Jackson Jackson & Associates Inc. as architect and Engineering Technologies Inc. (ETI) as the mechanical/electrical consultant.
- **Major equipment:** One Daikin CAH032 air handling unit (AHU-1), one Riello AR-1500 natural-gas boiler (B-1), and one Daikin DCSA040 condensing unit (CU-1), plus associated hydronic piping, ductwork, controls, pumps, coils, exhaust equipment, electrical panelboard modernization, equipment circuits, and disconnects.
- **Additional specified equipment:** One Spirotherm VDN 300FA air separator, one JL Wingert GL30 glycol make-up tank, one Taco CA-90 expansion tank, one Greenheck SQ100 refrigerant exhaust fan, one Greenheck G-099-VG exhaust fan, and two reheat coils. See product line items for equipment ratings and service details.
- **Work and pricing structure:** One lump-sum base bid for the HVAC replacement and electrical modernization; one separately priced alternate for capping the existing boiler flue and routing a new boiler flue and combustion-air duct through a new painted stud-and-gypsum-board chase, including floor cutouts.
- **Notable requirements:** Preserve asbestos-containing below-grade return ductwork and maintain service to areas outside the work scope. Contractors must hold a City of Omaha Mechanical Contractor’s License and submit an Economic Sustainability Plan when applicable to the project threshold. The plan includes small and emerging business participation, workforce development, and youth engagement; apprentice utilization may qualify for an incentive. Bid security and a post-award performance bond are required.

### Description

The City of Omaha is seeking bids for a complete HVAC system replacement and electrical modernization at the Willa Cather Library in Omaha, Nebraska. Mechanical work includes installing a new heating boiler, AHU-1, exterior condensing units, hydronic piping, and updated ductwork; electrical work includes a modernized panelboard and required equipment circuits and disconnects. An Economic Sustainability Plan and verification of a City of Omaha Mechanical Contractor's License are required at bid time. The project has no SEB reserve, and apprentice utilization is optional.

[View original listing](https://douglascountypurchasing.ionwave.net/PublicDetail.aspx?bidID=1313&SourceType=1)