# Douglas County Ionwave #CI-2026-0141 Addendum 2

Willa Cather Library HVAC Replacement and Electrical Modernization

**Posted:** October 21, 2026
**Respond By:** November 18, 2026
**Identifier:** CI-2026-0141 Addendum 2
**NAICS:** 238220, 238210

The City of Omaha is seeking a contractor to replace the HVAC system and modernize electrical systems at Willa Cather Library.
- **Government buyer:** City of Omaha, Public Works Department; procurement through Douglas County Purchasing, with Facilities Management involved in site coordination. The Economic Sustainability Program is administered by the City’s Human Rights and Relations Department.
- **Main scope:** Replace the library’s boiler, AHU-1, condensing unit(s), hydronic piping, and ductwork; modernize the panelboard and provide required equipment circuits and disconnects. Drawings identify one Daikin AHU, one Daikin condensing unit, one Riello boiler, associated pumps and coils, and exhaust equipment.
- **OEMs and named manufacturers:** **Daikin** (AHU and condensing unit); **Riello** (boiler shown in drawings) and **Lochinvar** (prior-approved boiler manufacturer); **Spirotherm**, **JL Wingert**, **Taco**, and **Greenheck** (equipment shown in drawings). Other named manufacturers include **Nexus**, **American Wheatley**, **John Wood Co.**, **Wessels**, and **B&G** for hydronic components, plus **Lithonia**, **Metalux**, **Columbia**, **Sure-Lites**, and **Dual-Lite** for lighting products referenced in schedules.
- **Notable requirements:** Boiler alternatives must provide N+1 redundancy; boiler specifications include at least 96.1% thermal efficiency and BACnet integration. Listed and approved polypropylene vent piping is allowed as an alternative to specified CPVC or AL29-4C stainless steel. Project-affected above-grade supply ductwork requires cleaning; below-floor return duct cleaning is excluded by the clarification. Below-grade return ductwork containing asbestos must be preserved, and service must be maintained to areas outside the work scope.
- **Alternates and services:** An alternate covers capping the existing boiler flue and routing a new flue and combustion-air duct through a new chase with floor cutouts. Other specified services include HVAC testing and balancing, controls commissioning and training, equipment demonstration, and one year of water-treatment maintenance. Documents conflict on below-floor return duct cleaning and a variable-frequency controller; confirm these items against the final contract documents. The initial scope states the existing motor starter remains and no new VFD is required.
- **Business and workforce requirement:** An Economic Sustainability Program plan is required, including small-business participation and workforce-development commitments; qualifying apprentice use may earn an incentive.

### Description

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

[View original listing](https://douglascountypurchasing.ionwave.net/PublicDetail.aspx?bidID=1329&SourceType=1)