Commercial Ventilation Design in Orange, CA

At #1 AC Guys, commercial ventilation design is more than ductwork—it is a health, safety, and performance strategy for your building. Rooted in four generations of engineering and over 80 years of combined expertise, our family business delivers clean, reliable airflow that keeps teams productive, protects processes, and helps you pass inspections the first time.

What we design

• Dedicated Outdoor Air Systems (DOAS) with energy recovery (ERV/HRV) for higher indoor air quality and lower energy use.
• Demand-controlled ventilation using CO₂ sensors to modulate outdoor air for real-world occupancy.
• General and restroom exhaust per California Mechanical Code and ASHRAE 62.1.
• Commercial kitchen hood and grease exhaust per IMC and NFPA 96, with make-up air and hood balancing.
• Warehouse and light industrial dilution ventilation for particulates, odors, and heat.
• Parking garage ventilation with CO/NO₂ strategies and sensor-based control.
• Stairwell pressurization and smoke control coordination with life-safety consultants.
• Make-up air units, rooftop exhaust fans, inline fans, and acoustics/attenuation integration.
• Integration with Bosch heating and cooling equipment for a cohesive HVAC solution.

Our engineering process

• Discovery and site survey: we capture occupancy, schedules, heat/moisture sources, and architectural constraints.
• Ventilation calculations: ASHRAE 62.1 multi-space and zone calculations aligned with Title 24 requirements.
• Energy strategy: ERV/HRV selection, economizer logic, and demand-controlled ventilation to reduce kWh and kW.
• Duct and fan design: SMACNA-compliant layouts, pressure loss calculations, fan curves, and noise criteria targeting.
• Controls and sequences: BMS/BACnet-friendly sequences for ventilation, economizer, CO₂ reset, and alarms.
• Permit-ready set: coordinated plans, schedules, details, and specifications for fast approvals in Orange and Orange County.
• Installation support and commissioning: field QA, startup, and testing, adjusting, and balancing (TAB) to verify performance.

Why #1 AC Guys

• Fourth-generation family of engineers with 80+ years of combined engineering expertise.
• Specialists in complex, large-scale commercial projects with tight schedules and strict code requirements.
• Factory-trained by Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China).
• Mission-driven focus on healthier indoor air and occupant well-being.
• Clear communication with owners, GCs, and design teams; BIM/Revit coordination available.
• Local knowledge of Orange and Orange County permitting pathways to help keep your project on track.

Bosch integration, done right

Whether your facility uses Bosch heat pumps, air handlers, or hydronic equipment, we design ventilation to integrate smoothly—matching airflow and control sequences, coordinating economizer logic, and aligning filtration and energy recovery to the equipment’s capabilities. Our Bosch-compatible approach ensures the ventilation system and mechanical plant operate as one efficient, reliable solution.

Deliverables you can build from

• Permit-ready drawings: plans, sections, details, and equipment/air device schedules.
• Ventilation and load calculations with assumptions and diversity factors clearly documented.
• Fan curves, duct pressure profiles, and sound/NC considerations for occupant comfort.
• Controls narratives and points lists for BAS integration, including CO₂ reset and economizer sequences.
• Submittal review support, startup checklists, commissioning plans, and TAB report templates.
• Owner training and O&M documentation to keep your system performing year after year.

Codes and standards we follow

• California Title 24, Part 6 energy standards.
• California Mechanical Code and applicable local amendments.
• ASHRAE 62.1 for Ventilation and Acceptable Indoor Air Quality; ASHRAE 55 thermal comfort guidance.
• ASHRAE/IES 90.1 energy efficiency best practices where applicable.
• SMACNA for duct construction and sealing; IMC/NFPA 96 for kitchen systems.

Industries we serve in Orange

• Offices and corporate campuses.
• Retail and mixed-use developments.
• Restaurants, commissaries, and food service.
• Healthcare clinics and tenant improvements.
• Fitness studios and schools/daycare.
• Light manufacturing, labs, and warehouses.
• Hospitality and entertainment venues.

Service area

We are based in Los Angeles and proudly serve Orange, CA and greater Orange County, as well as Los Angeles County, Ventura County, and Western Riverside County. If your project is nearby, we can help.

Start your project

Bring #1 AC Guys into your design conversation early for the best outcomes. We will right-size your commercial ventilation, streamline permits, and deliver cleaner, healthier air with lower operating costs. Contact us to schedule a site walk or send plans for a fast, competitive proposal.