Parking Garage CO Monitoring in San Jose and the South Bay

Enclosed parking in San Jose and Silicon Valley comes in a few familiar forms: podium garages under downtown apartment towers, underground levels below mixed-use blocks near transit, multi-level structures on corporate campuses, and garages under hospitals, hotels and medical offices. Each of them is required to have carbon monoxide detection running the exhaust fans, and each one depends on sensors that slowly drift out of calibration without any visible sign.

What we do for South Bay buildings

• CO and NO₂ sensor calibration with certified span gas, and a dated report for every sensor
• New system design and installation for garages with no detection, or with detection that never got wired to the fans
• Retrofit and replacement of panels and sensors that are discontinued or can no longer hold a calibration
• Ventilation and VFD controls so the fans run when the air needs it, not around the clock
• Troubleshooting: a beeping panel, fans that suddenly run nonstop, or a correction notice after a fire inspection

Campus garages and EV-heavy garages still need CO detection

A common question from South Bay facilities teams: if most of the cars in our garage are electric, do we still need the CO system? Yes. The requirement comes from the garage being enclosed, not from what people drive. Gas cars, delivery vans, shuttles and service trucks still use the garage, and IBC 406.4.2 still requires mechanical ventilation that runs either continuously or under CO detection control.

A working CO system is actually worth more in an EV-heavy garage. With fewer combustion engines, CO levels stay low most of the day, so properly calibrated sensors let the fans idle. A garage with failed or bypassed sensors usually runs its fans 24/7 instead, and Bay Area electricity is expensive. See how ventilation control works and our case studies for what that costs.

What inspectors in San Jose and Santa Clara County ask for

San Jose and the other South Bay cities adopt the California Fire Code, sometimes with local amendments of their own. Under CFC 916.11, gas detection systems have to be inspected and tested at least annually, with every sensor calibrated at the interval its manufacturer specifies. Cal/OSHA Title 8 section 5155 sets the 25 ppm, 8 hour exposure limit the system exists to protect.

Whether the visit comes from the San Jose Fire Department’s Bureau of Fire Prevention, another city’s fire marshal, or a building inspector reviewing a tenant improvement, the request is the same: a current, dated report for the gas detection system. That report is what we leave behind after every visit. The full code detail is on our code requirements page.

Why South Bay owners call us

Gas monitoring is the only thing we do, and we have been doing it since 1988. A mechanical contractor will often check the panel during an HVAC visit without span gas or the right regulators, which leaves a “serviced” sticker on sensors that were never actually calibrated. We service the panel already in your building, from Conspec, Macurco, CET, Honeywell and other manufacturers, rather than replacing it to suit us.

Portfolios across Silicon Valley and the Bay

If you manage several buildings between San Jose, the Peninsula and San Francisco, we schedule them together on one routed trip and return a report for each building. For San Francisco, Oakland and the East Bay, see our San Francisco Bay Area page.

Get a quote

Send us the address and roughly how many sensors are in the garage. If you don’t know, a photo of the control panel is enough. We will tell you what service it needs and what it costs, with no obligation.