Commercial, Hospital & Lab Ventilation in Los Angeles County

What we deliver

We provide end-to-end commercial, hospital, and laboratory ventilation services in Los Angeles County and neighboring Orange County, Ventura County, and Western Riverside County. Our focus is clean, safe, and energy-smart air systems for mission-critical spaces.

• Hospital ventilation: isolation rooms (negative/positive pressure), operating rooms, PACU, patient care areas, imaging suites, sterile processing, pharmacies.
• Laboratory ventilation: fume hood exhaust and diversity management, general supply/exhaust, makeup air, cleanrooms (ISO-class), BSL-2/BSL-3 spaces, tissue culture rooms.
• Commercial ventilation: life science facilities, biotech and pharma production, universities, med office buildings, data-critical areas with strict cooling/ventilation needs.
• Design-build, plan-and-spec, and retrofits: from fast-track upgrades to ground-up projects with rigorous commissioning and turnover documentation.
• Performance safeguards: HEPA/ULPA filtration strategies, MERV 13–16 upgrades, precise ACH targets, redundancy for critical areas, energy recovery without cross-contamination.

Engineering and compliance you can trust

Every design is led by engineers committed to your compliance, reliability, and operating cost goals. We align systems with widely adopted standards and guidelines for healthcare and labs, including ASHRAE 170 (healthcare ventilation), California Mechanical Code, California Title 24 energy standards, USP 797/800 for sterile compounding (where applicable), CDC and OSHA best practices, and local Authority Having Jurisdiction requirements. For healthcare facilities, we coordinate documentation to support HCAI (formerly OSHPD) processes as needed.

Our mission is healthy air for a healthy life. That means designing for safety first, then optimizing for energy and serviceability. We prioritize pressure cascades, contamination control, and maintainability so your team can operate with confidence.

Controls, monitoring, and commissioning

Great ventilation is measurable. We deploy smart controls and sensors to verify performance in real time.

• DDC/BAS integration for VAV/VFD control, economizers, energy recovery, and sequence optimization.
• Room-level differential pressure, temperature, and humidity monitoring with alarms and trending.
• Testing, Adjusting, and Balancing (TAB) and functional performance testing to documented acceptance criteria.
• Clear turnover packages with O&M manuals, setpoints, as-builts, and staff training.

Need to validate ACH, pressurization, or filtration performance? Our commissioning and re-commissioning services help you prove compliance and sustain it over time.

Why #1 AC Guys

• 80+ years in engineering, four generations of a family of engineers delivering complex HVAC solutions in Southern California.
• Factory-trained team at Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China) with deep hands-on field expertise.
• Specialists in large, high-stakes healthcare and laboratory projects where uptime and cleanliness are non-negotiable.
• Engineer-led designs that balance code compliance, performance, energy efficiency, and lifecycle cost.
• Rapid response and phased construction to minimize downtime and disruption in active facilities.

Our process

• Discover: site walk, risk assessment, and code review aligned to your occupancy and AHJ requirements.
• Design: airflow modeling, pressure zoning, equipment selection, and controls sequences tailored to your space.
• Build: clean construction practices, infection control planning, and meticulous installation.
• Commission: TAB, verification of ACH, pressure differentials, filtration, and sequence testing.
• Maintain: scheduled service, filter and belt programs, sensor calibration, and proactive energy optimization.

The result is a right-sized, resilient ventilation system that protects people and product, while managing energy spend.

Service area

We proudly serve Los Angeles County and nearby areas: Orange County, Ventura County, and Western Riverside County. From downtown Los Angeles hospitals to university labs in West LA and life-science campuses in Thousand Oaks and Irvine, our team mobilizes quickly with local knowledge and resources.

Capabilities for critical spaces

• Isolation suites with reliably maintained negative pressure gradients and anterooms.
• Operating rooms with tight temperature/humidity control and validated airflow patterns.
• Cleanrooms with defined ISO cleanliness classes, pressure cascades, and HEPA/ULPA strategies.
• Laboratory exhaust systems with diversity controls to stabilize building pressurization and energy use.
• Energy recovery designed to prevent cross-contamination while meeting Title 24.

If your facility must achieve specific air change rates, filtration targets, or pressure differentials, we will document compliance and create an operational playbook for your staff.

Get started

Need a compliant ventilation upgrade, an emergency negative-pressure conversion, or a ground-up design in Los Angeles? Schedule a no-obligation site assessment. We will deliver a clear scope, timeline, and budget backed by an engineer-led design and a commissioning plan. When the air has to be right, trust #1 AC Guys to build it right—and keep it right.