HVAC Diagnostics

Continuous fault detection for air handling units, chillers, and plant-wide HVAC systems using BACnet data and physics-based models.

What we do

We connect directly to your BACnet or Modbus controls, pull live and historical data, and run physics-based diagnostics that catch faults as they develop — not months later during a scheduled audit.

Typical findings

Fouled coils. Heat balance residuals detect coil degradation weeks before occupant complaints. We quantify the energy penalty so you can justify the cleaning.
Stuck or hunting valves. Control valve position vs. coil delta-T reveals valves that aren’t doing what the BAS thinks they’re doing.
Simultaneous heating and cooling. Zone-level energy analysis catches the most expensive HVAC waste pattern, even when the BAS reports no alarms.
Economizer failures. Mixed-air temperature models detect damper failures, broken linkages, and incorrect changeover points.
Sensor drift. Cross-validating redundant sensors and checking them against physics bounds identifies drift before it corrupts control loops.

How it works

Connect. We deploy a small edge device on your OT network. It speaks BACnet/IP, Modbus TCP, or OPC UA. No cloud dependency — data stays on your network until you decide otherwise.
Model. We build a graph of your actual plant from your P&IDs, point lists, and as-built drawings. Not a generic template — your specific AHUs, zones, and piping.
Validate. Physics-based soft sensors (heat balance, mass balance, steady-state detection) run continuously against incoming data. When reality diverges from expectation, we investigate.
Report. You get quantified findings with avoided-cost estimates. Actionable, not academic.

Engagement model

Pilot (1–3 months): 1–3 AHUs, prove the method on your systems, deliver a findings report.
Campus-wide (6–12 months): Full plant coverage, continuous monitoring, quarterly reviews.
Retainer: Ongoing diagnostic coverage with monthly reporting.