Commercial Rooftop HVAC Replacement
RTU Replacement & Installation in Orange County
Full-scope rooftop unit replacement — sized to your actual load, coordinated from crane pick to final inspection, and built around your operating hours instead of the other way around. UA Local 250, PLA and prevailing-wage ready for public agency and portfolio-scale work.
What's actually involved in a proper RTU replacement
Crane scheduling, rigging, and roof access planned so the lift happens on schedule and doesn't become the bottleneck.
New unit matched to the existing curb where possible, or adapted correctly — this is where a 'simple swap' most often turns into a bigger job if it's not checked upfront.
Full mechanical, electrical, and condensate work brought up to current code, not just bolted to what was there before.
Permit and inspection coordination handled, with equipment selected to meet California Title 24 energy requirements for the replacement.
After-hours and weekend replacement windows available when a shutdown during business hours isn't an option.
Sequenced replacements across multiple units or multiple properties for portfolios and facility teams managing more than one site.
Decisions we walk you through — not around
Change-out vs. retrofit
A straight change-out replaces the unit on the existing curb and connections. A retrofit adjusts curb, ductwork, or electrical to fit a different unit type or capacity. We'll tell you which one your site actually needs before quoting — not default to whichever is easier to sell.
Repair vs. replace
Age, refrigerant type, and what's actually failing all factor in — not just a flat percentage-of-replacement-cost rule. See our repair-vs-replace guidance for the full framework.
Sizing for actual load
Replacement equipment sized to real load, hours of operation, and required air changes for the space — not just matched to the old unit's tonnage by default.
Lifecycle planning for portfolios
For multi-unit sites and property portfolios, we can help sequence replacements across a budget cycle instead of waiting for simultaneous failures.
Brands we install and replace
Trane, Carrier, Daikin, York, Lennox, Mitsubishi Electric, and other commercial-grade manufacturers. If it's commercial equipment, we've likely worked on it — ask us.