Commercial HVAC Installation & Replacement
When equipment reaches end of life or a new space needs HVAC, J3 develops the commercial mechanical scope around verified load basis, equipment, distribution, controls, utilities, access, phasing, startup, and turnover. Professional design responsibility is confirmed for each project rather than implied.
- Packaged RTU installation & changeouts
- VRF / VRV & ductless systems
- Chillers, boilers & hydronic piping
- Makeup air & dedicated outdoor air (DOAS)
- Curb adapters fabricated in-house
- Load-basis and equipment-selection coordination
- Crane logistics & after-hours changeouts
- Startup, commissioning & warranty support
Engineered before it’s installed
Installation planning should confirm the project load basis, equipment selection responsibility, routing, controls, utilities, code, access, and other-trade interfaces before procurement. Where professional engineering is required, it remains with the qualified party assigned to the project.
In-house fabrication through Velocity Sheet Metal
BIM and spool-drawing workflows can support coordinated fabrication when that capability, facility, schedule, and responsibility are confirmed for the project. No fabrication location, production rate, or labor-saving outcome is promised here.
System and application review
Packaged rooftop units, split systems, VRF/VRV, chillers and hydronic loops, makeup air, and dedicated outdoor air systems — for office, retail, industrial, healthcare, hospitality, and multifamily properties. We handle crane logistics, curb adaptation, controls integration, and startup.
Replacement without downtime drama
Occupied-building work requires an approved outage and communication plan covering tenants or operations, weather, crane access, roof protection, temporary conditions where feasible, controls, startup, and contingencies. Schedule and commercial terms are project-specific.
Request an installation or replacement scope review.
Prefer the phone? Call 210-761-5514 — we answer.
Frequently Asked Questions
How much does commercial HVAC installation cost in San Antonio?
How long does a commercial rooftop unit replacement take?
Do you handle permits and code compliance?
Can you replace a unit on a curb that doesn’t match the new equipment?
Ready when your building is.
Discuss the building, equipment, operating impact, schedule, and scope with J3 Mechanical.