Commercial High-Rise HVAC Systems in Fullerton

#1 AC Guys specializes in Commercial High-Rise HVAC Systems for Fullerton and surrounding Orange County. As a family company of fourth-generation engineers with 80+ years in engineering, we combine deep technical expertise with meticulous project management to deliver safer, cleaner, and more efficient buildings. Our mission is healthy indoor air for a healthier life, and we bring that mission to every floor, riser, and mechanical room.

What we deliver for high-rise commercial projects

• Design-build and plan-spec execution for towers, mixed-use, hospitality, medical, and campus facilities
• VRF and heat recovery systems sized for vertical loads and tight shafts
• Chiller and boiler plant design, pump and VFD optimization, and cooling tower upgrades
• DOAS with energy recovery for code-compliant ventilation and superior IAQ
• VAV, fan coil, and water-source heat pump solutions engineered for even comfort
• Building automation and controls integration for visibility, scheduling, and analytics
• Title 24 compliance, ASHRAE 62.1 and 90.1 alignment, submittals, and plan-check support
• Seismic bracing, smoke control coordination, and life-safety interface verification
• Retrofits, capital planning, commissioning, and test-and-balance
• Preventive maintenance programs built to minimize downtime and extend asset life

We are factory-trained at the manufacturing facilities of Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China). That training helps us translate complex specifications into clean, serviceable designs that perform in real-world conditions.

Engineered for vertical performance and IAQ

High-rise HVAC is more than tonnage. It is pressure management, sound control, riser strategy, and service access. We design for equalized airflow across floors, correct refrigerant and hydronic piping, filtration that meets building health goals, and controls logic that adapts to part-load operation. Our recommendations typically include MERV 13 or better filtration, demand-control ventilation using CO2 sensors where appropriate, and energy recovery to cut outside air loads without compromising indoor air quality.

Every solution aims to balance IAQ, comfort, energy use, and maintainability. That means thoughtful equipment placement, isolation valves and cleanouts, labeled controls points, and documentation that enables your in-house team to operate with confidence.

Codes, standards, and documentation

We design and execute with California Title 24 and CALGreen in mind, align with ASHRAE 62.1 for ventilation and 90.1 for energy, and coordinate with applicable NFPA standards and local fire and building departments. We prepare coordinated submittals, sequences of operation, and O&M packages to streamline plan review and turnover. Our commissioning and TAB process verifies airflow, water balance, controls setpoints, alarms, and trending so that performance is proven, not assumed.

Technologies we deploy

• VRF and heat recovery systems sized for tower diversity and zoning complexity
• High-efficiency chillers, condensing boilers, primary-secondary pumping, and VFDs
• DOAS with ERV, demand-control ventilation, and economizer strategies
• VAV and fan coil systems with pressure-independent control
• Smart BAS integration for scheduling, fault detection, and remote insights
• Noise and vibration mitigation, low-NOx boiler solutions, and water treatment best practices

When VRF is right, we design for vertical line lengths, branch placement, oil return, and service clearances. When central plants are best, we right-size chillers and boilers for actual load profiles, select pumps for optimal delta P, and deploy control sequences that handle shoulder seasons gracefully.

Phased work with minimal disruption

We coordinate closely with building management, tenants, and GCs to phase work, schedule shutdowns, and maintain conditioned spaces whenever possible. Clear communication, safety-first job sites, and documented procedures help keep projects on track and occupants productive.

Retrofit and modernization

Modernization can unlock major gains in IAQ and energy without wholesale replacement. Typical measures include variable speed upgrades, DOAS additions for code-compliant ventilation, heat recovery retrofits, controls reprogramming, and coil and valve replacements. We evaluate lifecycle cost, payback, and maintenance impact so you can prioritize smartly across fiscal years.

Service area and building types

Based in Greater Los Angeles, we serve Fullerton and all of Orange County, plus Los Angeles County, Ventura County, and Western Riverside County. Building types include offices, mixed-use towers, hospitality, medical, education, and specialized facilities with stringent ventilation requirements.

Safety, quality, and transparency

Quality control is baked into every step: preconstruction reviews, shop drawings, clash checks, factory start-ups where applicable, and turnover training for your staff. You receive transparent scopes, schedules, and progress updates, with punchlists tracked to closeout so there are no surprises.

Start with a clear plan

Whether you need a diagnostic on chronic comfort issues, a phased retrofit plan, or a ground-up high-rise design in Fullerton, #1 AC Guys is ready to help. Our fourth-generation engineering team brings 80+ years of experience to your project and a mission to deliver healthier air with measurable performance.

• Site assessment and load analysis
• System comparison and budgeting
• Phased implementation roadmap
• Maintenance program tailored to your operations

Tell us your goals for IAQ, energy, and timelines. We will provide a practical path from concept to commissioning and ongoing care—so your high-rise runs quietly, safely, and efficiently, floor after floor.

Contact #1 AC Guys to schedule a consultation for Commercial High-Rise HVAC Systems in Fullerton.