Commercial Carrier Rooftop Unit (RTU) Installation in Rialto

When your business depends on dependable comfort and clean air, choosing the right partner for a Carrier rooftop unit matters. #1 AC Guys is a 4th‑generation family of engineers serving Rialto and nearby communities with end‑to‑end commercial RTU installation—planning, permits, crane lifts, curb adapters, start‑up, and commissioning—delivered with precision and accountability.

Engineer‑led planning for faster, safer installs

Every rooftop project begins with field verification and calculations that protect your investment: load sizing, ventilation per ASHRAE guidance, electrical capacity, gas service, structural and seismic needs, and roof curb fit. We coordinate the crane plan and safety logistics to minimize downtime and keep your site operating. Our team documents each step to meet California Mechanical Code and Title 24 requirements.

Carrier RTU options we install

We install a broad range of Carrier commercial rooftop units to match your building’s application—from small retail bays to large multi‑zone facilities. Systems can include high‑efficiency compressors, economizers for free cooling, and advanced controls.

• Gas/electric, electric/electric, and heat pump configurations
• High‑efficiency and high‑IEER models to reduce operating costs
• Economizers, CO2‑based demand‑control ventilation, and low‑leak dampers
• MERV‑13 filtration options and IAQ upgrades (HEPA cabinets, UV‑C, air cleaning strategies)
• Supply/return fan VFDs for better part‑load performance
• BMS integration readiness (BACnet/Modbus gateways as applicable)
• Hail guards, coated coils, and coastal protections for longevity
• Approved smoke detector and curb configurations to meet local code

Our step‑by‑step installation process

• Site assessment and engineering: load calcs, ventilation, power, gas, and curb review
• Scope and proposal: clear deliverables, lead times, crane plan, and commissioning outline
• Permitting: Title 24 documentation, mechanical/electrical permits, and inspections
• Pre‑fabrication: curb adapters and accessories prepped to shorten on‑site downtime
• Crane day: safe lift execution, old unit removal, new Carrier RTU set, and curb sealing
• Connections: gas, condensate, electrical, smoke detectors, controls, and economizer
• Start‑up and commissioning: airflow tuning, economizer setpoints, controls verification
• Owner turnover: documentation, training, and maintenance recommendations

Healthy air is our mission

Comfort means little without good indoor air quality. We design each Carrier rooftop installation with proper outdoor air, filtration, and controls in mind. From MERV‑13 filters and demand‑controlled ventilation to UV‑C and proven air cleaning strategies, we help your team breathe easier while keeping energy use in check.

Why #1 AC Guys

• 80+ years of engineering know‑how; 4th‑generation family business
• Focused on complex commercial projects with tight timelines
• Factory‑trained experience with leading HVAC technologies (Fujitsu, Mitsubishi Electric, Midea, Gree, Haier)
• Code‑compliant, Title 24‑ready designs and documentation
• Seamless coordination: crane, curb adapters, inspections, and commissioning
• Transparent scopes and clean, professional job sites

Note: We install and commission Carrier equipment per manufacturer guidelines and applicable codes. Our team is experienced in Carrier RTUs and maintains manufacturer specifications throughout the process.

Service area

We proudly serve Rialto and surrounding communities across Greater Los Angeles and the Inland Empire, including Los Angeles County, Orange County, Ventura County, and Western Riverside County. If your facility is nearby, our team is ready to help.

Frequently asked questions

How long will my business be down?
Most like‑for‑like swaps with proper planning can be completed in a day. Larger or multi‑unit projects may take 1–2 days, scheduled to minimize disruption.

Do you handle permits and Title 24?
Yes. We prepare and submit the required mechanical/electrical permits and Title 24 documentation, then meet inspectors on site.

Can you integrate with our existing controls?
In many cases, yes. We verify compatibility and provide the necessary gateways or control strategies for smooth BMS integration.

What about warranties?
We follow Carrier installation and start‑up guidelines so factory warranties remain in force. We also stand behind our workmanship.

Get a precise, engineered quote

Ready to replace or add a Carrier rooftop unit in Rialto? Contact #1 AC Guys for an engineer‑led site visit and a clear, code‑compliant plan. We’ll right‑size your RTU, streamline the crane day, and commission it for comfort, IAQ, and efficiency—so your business runs better, longer.