# Plano Independent School District Ionwave #CSP 2027-01-03 Addendum 1

Daffron Elementary School HVAC System Replacements and Compliance Work

**Posted:** October 30, 2026
**Respond By:** December 01, 2026
**Identifier:** CSP 2027-01-03 Addendum 1
**NAICS:** 238220

Plano Independent School District is seeking proposals to upgrade HVAC systems and complete related work at Daffron Elementary School.
- **Government buyer:** Plano Independent School District, Purchasing Department; Plano, Collin County, Texas.
- **Scope:** Replace the campus HVAC controls system and existing air-cooled chillers, replace three rooftop units (RTUs), install visitor signage, and perform related mechanical, electrical, and controls work for complete, operational systems.
  - Alternate No. 1: Replace the existing make-up air unit and perform associated work.
  - Includes a $50,000 allowance for valves, actuators, and strainers, plus a $75,000 contingency.
- **Budget:** Estimated base budget is $1,455,000. Including the stated allowance and contingency, the indicated total is approximately $1,580,000.
- **OEMs and vendors:** No equipment manufacturers, OEMs, or product vendors are identified; no models or part numbers are specified.
- **Notable requirement:** The contractor must deliver complete, operational systems and associated project work.

### Description

Plano Independent School District is requesting competitive sealed proposals for the Daffron Elementary School Systems and Compliance project. The base scope includes replacement of the campus HVAC controls system, existing air-cooled chillers, and three rooftop units; installation of new visitor signage; and associated mechanical, electrical, and controls work. Alternate No. 1 includes replacing the existing make-up air unit and associated work. The stated estimated budget is $1,455,000, plus a $75,000 contingency and a $50,000 allowance for replacement of valves, actuators, and strainers. Proposals are due December 1, 2026, and require both electronic submission through IonWave and a hard-copy submission.

[View original listing](https://pisd.ionwave.net/PublicDetail.aspx?bidID=2877&SourceType=1)