⚙️ Ziegler-Nichols & Cohen-Coon Closed-Loop PID Tuning (Kp, Ki, Kd for VAV Airflow)

VAV Box DDC Controller PID Tuning Calculator

Model Proportional-Integral-Derivative (PID) loop tuning constants for commercial Variable Air Volume (VAV) terminal units under ASHRAE Guideline 36: calculate optimal Proportional Gain (Kp), Integral Time (Ti), and Derivative Time (Td) for damper actuator airflow control and hydronic reheat valves to eliminate temperature hunting, and TAB profits.

1. Project & Operating Inputs

VAV Terminal Boxes Tuned & Re-Commissioned (VAV Count e.g. 160 VAVs)

Average Actuator Stroke Time (Seconds e.g. 90-Second Floating Actuator)

Customer Bid Price for VAV PID Tuning & Air Balancing ($ / VAV Box)

Flow Hood Measurement, DDC Software Calibration, TAB Certified Tech ($ / Unit)

2. Financial Breakdown & Yield

ASHRAE 36 VAV PID LOOP TUNING

Turnkey VAV Re-Tuning Contract Profit

Commissioning & TAB Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost