Commercial & Industrial Exhaust Systems in Downey, CA

Engineered Exhaust Solutions for Downey Facilities

Healthy air powers healthy business. At #1 AC Guys, our mission is simple: healthier indoor air for healthier lives. Our fourth-generation family of engineers brings 80+ years of engineering expertise to commercial and industrial exhaust systems across Downey, CA. Whether you need a new design-build, a code-driven retrofit, or lifecycle maintenance, we deliver clean air performance that stands up to real-world conditions—and local plan check.

We align every project with California Mechanical Code, Title 24, NFPA 96 (for commercial kitchen exhaust), SMACNA fabrication standards, and applicable South Coast AQMD rules. From submittals to commissioning and TAB, you get documentation your inspectors and facility team will appreciate.

We source commercial-grade equipment and materials through AC PRO to keep projects moving and parts available when you need them.

What We Do

• Design-build exhaust systems for commercial and industrial facilities
• Installation and retrofit of fans, ductwork, hoods, and make-up air
• Commercial kitchen exhaust (NFPA 96) with UL 762 fans and grease duct
• Industrial process and fume exhaust with appropriate materials and capture
• Laboratory and healthcare exhaust with source capture and dilution strategies
• Parking garage ventilation with CO/NO2 demand control and VFDs
• Smoke control and stairwell pressurization coordination
• Make-up air systems, heat/energy recovery, and air balance
• Controls integration (DDC/BMS), safety interlocks, and monitoring
• Testing, adjusting, and balancing (TAB) with final reports
• Preventive maintenance, cleaning, and performance tuning

Compliance and Quality

Compliance is engineered in from day one. We design to the loads, capture velocities, and pressure regimes your process demands, then select AMCA-rated fans, properly sized duct per SMACNA, and code-acceptable materials (e.g., welded grease duct with fire wrap for kitchens; coated steel, FRP, or PVC for corrosive streams where specified). We coordinate fire-life safety devices, firestopping, access doors, and maintenance clearances so the whole system works—as intended and as inspected.

For kitchens, we implement grease containment, spark arrestors where required, listed hoods, and appropriate clearances. For garages, we deploy demand-controlled ventilation using CO/NO2 sensors to cut energy while maintaining safety. For labs and industrial processes, we work with capture devices, dilution strategies, and materials suitable for the airstream—always guided by the design criteria and applicable standards.

Technology and Components

• EC and VFD-driven fans for stable airflow and energy savings
• Demand-controlled ventilation via gas and particulate sensing
• Energy and heat recovery where applicable to reduce operating cost
• Grease mitigation: listed hoods, UL 762 exhaust fans, and containment
• Corrosion-resistant duct (coated steel, PVC, FRP) when specified
• Sound attenuation, vibration isolation, and curb/roof coordination
• Interlocks with appliances, fire alarm, and BMS for safe operation
• Digital monitoring: pressure, airflow, and filter loading

We maintain parts availability through AC PRO for fans, ductwork, controls, and accessories to minimize downtime and keep schedules predictable.
Our engineers were factory-trained at Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China), bringing disciplined, manufacturer-informed practices to every installation and service visit.

Our Process

• 1. Site assessment & goals: We walk the space, review drawings, and capture load/process data.
• 2. Engineering & submittals: Calculations, equipment selections, duct layouts, and controls narratives.
• 3. Permits & plan check support: We prepare documentation and support city and county review.
• 4. Installation: SMACNA-quality ductwork, code-clearances, and rigorous safety practices.
• 5. Commissioning & TAB: Setpoints, interlocks, airflow verification, and as-builts.
• 6. Training & handoff: Operator training, O&M manuals, and maintenance schedules.
• 7. Lifecycle care: Preventive maintenance, cleanings, and responsive service calls.

Industries We Serve in and around Downey

• Restaurants, food halls, and commercial kitchens
• Food and beverage processing
• Manufacturing and fabrication shops
• Warehouses and logistics hubs
• Auto service and body shops
• Laboratories, R&D, and light pharma
• Healthcare clinics and dental suites
• Schools, universities, and public facilities
• Hospitality, retail, and mixed-use buildings

Service Area

Based in Southern California, #1 AC Guys serves Downey and the broader region: Los Angeles County, Orange County, Ventura County, and Western Riverside County. We offer fast response in Downey and neighboring cities to keep your project and operations on track.

Why #1 AC Guys

• 80+ years of engineering expertise across a four-generation family business
• Proven success on large and complex commercial and industrial projects
• Factory-trained at Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China)
• Health-focused design for cleaner indoor air and dependable performance
• Code-first approach with clear documentation and inspections support
• AC PRO supply chain for dependable, commercial-grade parts and equipment
• Straightforward communication, scheduling, and aftercare

Get a Quote

Need a new commercial or industrial exhaust system in Downey—or an upgrade that actually solves the problem? Contact #1 AC Guys for an on-site assessment and a clear, engineered plan. We’ll align performance, compliance, and cost so your facility gets safe airflow, steady operations, and long-term value.