Commercial Ventilation Design in Fontana for York Systems

As your engineer-led HVAC partner in Fontana, we approach ventilation as a system—airflow, filtration, heat rejection, and controls working together around your chosen equipment. If your standard is York, we design to maximize the performance of those RTUs, air handlers, and ERVs while meeting California energy code and your operational KPIs.

What we design for commercial ventilation

• Outside air and exhaust systems engineered to ASHRAE 62.1 with demand-controlled ventilation (CO2) to reduce energy waste
• York-integrated RTU/AHU ventilation with factory economizers, ERV/HRV selections, and VAV/VVT zoning
• Make-up air for kitchens, welding bays, paint rooms, and other process exhaust with proper space pressurization
• High-bay and warehouse solutions: destratification, dock door relief, and fan-assisted airflow management
• Filtration and IAQ upgrades: MERV 13+, HEPA (where needed), UV-C, and air quality sensing strategies
• Retrofit ventilation for tenant improvements, expansions, or code-driven upgrades

Our engineering workflow

We start with a thorough site assessment—occupancy patterns, process loads, existing equipment, and control points—then build a ventilation basis of design that your GC, architect, and facilities team can execute with confidence.

• Load calculations and ventilation rate procedure per ASHRAE 62.1
• Airflow modeling for outside air, relief, and exhaust paths; stratification risk checks
• Duct routing, sizing, and materials; rooftop coordination and curb details
• Controls sequences for economizers, ERV wheel logic, and DCV setpoints
• Title 24 Part 6 compliance forms and ready-for-permit mechanical plans
• TAB (testing, adjusting, balancing) specifications and commissioning checklists

York-focused design know-how

We routinely design around York commercial equipment—including RTUs, air handlers, ERVs, and VAV boxes—optimizing economizer use, ventilation setpoints, and low-leakage duct design to protect delivered CFM. Our controls sequences align with typical BMS integrations (BACnet/IP or MS/TP), enabling stable DCV, morning warm-up, and purge cycles. Whether you’re standardizing across multiple York models or blending legacy units with new ERVs, we right-size outside air and exhaust to avoid over-ventilation penalties while keeping air quality high.

Code, compliance, and permitting

We design to ASHRAE 62.1 and 90.1, the California Mechanical Code, and California Title 24. For kitchens, we follow IMC/CMC and NFPA 96 hood and make-up air requirements. Our submittal sets include ventilation calcs, sequences, schedules, and Title 24 documentation to streamline plan review with the City of Fontana and help you pass inspections the first time.

Industries we serve in and around Fontana

• Warehousing, logistics, and last-mile distribution
• Light manufacturing and assembly
• Grocery, retail, and restaurants
• Office, fitness, and education spaces
• Medical/dental clinics and labs (non-OSHPD)

Typical deliverables

• Permit-ready mechanical plans and schedules
• Ventilation and outside air calculations with assumptions and diversity factors
• Duct design, details, and equipment selections aligned to your York standards
• Controls diagrams and sequences for DCV, economizers, and ERV operation
• Title 24 compliance documentation and energy notes
• Commissioning and TAB specifications; owner training outlines

Why #1 AC Guys

• Fourth-generation family of engineers with 80+ years of engineering expertise
• Proven on complex, large-footprint commercial projects and tight schedules
• Factory-trained at Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China)
• Design-build capability or design-assist with your preferred GC and subs
• Mission-driven to deliver healthy indoor air with measurable energy savings

Service area and response

Based in Greater Los Angeles, we serve projects in Fontana and neighboring markets across Los Angeles County and nearby areas, including Western Riverside, Ventura, and Orange Counties. Need a fast turnaround? We can mobilize quickly for site walks, as-built verification, and coordination meetings.

Healthy air is healthy business. If you’re planning a new facility, expanding a production line, or bringing your site up to code—especially with York equipment standards—let’s engineer the right ventilation system from the start.

Request a consultation to schedule a site walk, receive a permit-ready scope and budget, and put your Fontana project on a clean path to approval and reliable operation.