Commercial Variable Air Volume (VAV) Box Repair in Santa Monica

VAV boxes are the heartbeat of many commercial HVAC systems in Santa Monica, modulating airflow to keep each zone comfortable and efficient. When they fail, you see hot/cold spots, noise, and rising utility bills. Our engineers find and fix the root causes, validate results with measurements, and document everything your facilities team needs.

What we repair and optimize

• Actuators and damper assemblies (stuck, drifting, or noisy)
• Reheat coils, valves, and control wiring for precise discharge temperature
• Differential pressure sensors and airflow stations for accurate CFM
• DDC/VAV controllers, I/O modules, and communication issues to the BMS
• Thermostats/zone sensors, calibration, and setpoint strategies
• Insulation, air leaks, and sound attenuation for quieter operation

Whether your building uses pressure‑independent or pressure‑dependent VAV boxes, we restore design airflow and sequence of operations, then confirm performance under load.

Common symptoms we resolve

• Hot/cold complaints and zones that never reach setpoint
• Boxes stuck at minimum or maximum CFM
• Short cycling, hunting, or unstable discharge temperature
• High noise levels from the box or branch duct
• Unexpected energy spikes after a tenant improvement
• BMS alarms, offline controllers, or sensor drift

After repairs, we complete functional tests, trend key points, and balance airflows to stabilize comfort and reduce operating cost.

Our commercial VAV diagnostic process

1) Interview occupants and review trends
2) Visual inspection of the VAV box, wiring, and damper motion
3) Verify sensor accuracy and controller programming
4) Measure differential pressure and CFM with calibrated instruments
5) Test reheat and valve operation under demand
6) Balance and document final settings with before/after data

AC PRO parts advantage

To minimize downtime, we maintain access to AC PRO–supplied, OEM‑grade components and consumables for VAV repairs — actuators, controllers, transformers, valves, and accessories. This supply depth helps us complete many same‑visit fixes and keep critical spaces (medical suites, labs, retail) operational.

Why #1 AC Guys for Santa Monica commercial VAV repair

• 4th‑generation family of engineers with 80+ years of engineering expertise
• Factory‑trained by Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China)
• Commissioning‑grade tools: airflow hoods, manometers, and data logging
• Clear reporting: deficiencies, corrective actions, and setpoints recorded
• Healthy‑air mission: ventilation aligned with ASHRAE 62.1 and Title 24 intent
• After‑hours work windows to reduce business disruption
• Service for all makes and models, including systems using AC PRO components

Compliance, IAQ, and energy performance

Every repair considers code and best practices. We verify ventilation rates, minimum and maximum CFM, and reheating logic to support ASHRAE 62.1 targets and California Title 24 sequences. Correctly tuned VAV boxes cut fan energy, reduce reheat, and maintain healthier indoor air through consistent outdoor air delivery.

Industries we support

• Office and creative spaces
• Retail and restaurants along the Santa Monica Promenade and beyond
• Medical, dental, and wellness suites where comfort and cleanliness matter
• Hospitality and mixed‑use facilities
• Education and nonprofit buildings

From single‑zone complaints to portfolio‑wide VAV retro‑commissioning, we scale to your scope and timeline.

Service area

Headquartered in Los Angeles County, we prioritize Santa Monica and the Westside while covering the broader region: Los Angeles County and nearby Orange County, Ventura County, and Western Riverside County for multi‑site commercial clients.

Planning a project or need urgent repair?

If your VAV box is noisy, stuck, or not meeting setpoints, we can help. Our engineers deliver data‑driven repairs with AC PRO‑sourced parts, airflow balancing, and documented results — so your building runs quieter, cleaner, and more efficiently.