Use this space for your automation, controls, or BMS estimating walkthrough.

• Division 25 is often coordinated heavily with Divisions 23 (HVAC) and 26 (Electrical).
• Specs may reference BACnet, Modbus, or LonWorks protocols — be familiar with communication compatibility.
• Commissioning requirements may appear here or in Division 01 — ensure you account for testing and documentation.
• Use this division to clarify responsibilities between automation, mechanical, and electrical trades.

1. Which divisions are most commonly coordinated with Division 25?
   Answer: Division 23 (HVAC) and Division 26 (Electrical).
2. What are BACnet, Modbus, and LonWorks?
   Answer: Communication protocols used in Building Automation Systems (BAS) for system integration.
3. Where might you find commissioning requirements besides Division 25?
   Answer: In Division 01 (General Requirements), often under Testing, Startup, or Commissioning sections.
4. Who typically provides the conduit and power for automation equipment?
   Answer: Electrical contractors, while mechanical provides control devices — coordination is key.
5. Why is Division 25 critical on LEED projects?
   Answer: Because it ensures system integration, energy monitoring, and proper control commissioning — all of which contribute to LEED credits.

Division 25: Integrated Automation (BAS & Controls)

🔹 Key Teaching Points

1️⃣ Coordination Across Divisions

• Division 25 bridges the scope between HVAC (Division 23) and Electrical (Division 26).
• Clarify who provides wiring, programming, and integration for each system element.

2️⃣ BAS Communication Protocols

• Specs may require BACnet, Modbus, or LonWorks compatibility — check every device and system interface.
• These impact how systems talk to each other and what is required for controllers and panels.

3️⃣ Commissioning Requirements

• Division 25 or Division 01 often lists required system startup tests and commissioning documentation.
• Don’t forget to estimate time and cost for point-to-point verification and final BAS reports.

4️⃣ Clarifying Trade Responsibilities

• Control scope is often split: mechanical handles control devices, while electrical provides conduit and power.
• Review schedules, drawings, and specs carefully to confirm who owns what.

✅ Wrap-Up Summary

• Division 25 defines how systems communicate and work together across trades.
• Check protocols, commissioning steps, and clearly divide automation roles between trades.
• Don’t underestimate the integration effort — especially on large or LEED-certified projects.