Rooftop Package Unit Services in San Jose, CA
Reliable rooftop HVAC systems that stand up to Bay Area weather — perfect for commercial and light-commercial spaces.
Rooftop Package Units in San Jose & the Bay Area
Restaurants, retail spaces, offices, and light-industrial buildings across San Jose rely on rooftop package units (RTUs) for heating and cooling — and when one fails in July, every hour costs you customers. Promax installs, replaces, and repairs rooftop package units throughout Santa Clara County, handling everything from crane scheduling and curb adapters to gas, electrical, and Title 24 compliance.
We work with building owners and property managers on both emergency changeouts and planned replacements, and we'll assess whether a modern high-efficiency RTU or a VRF conversion is the better long-term investment for your building. Preventive maintenance contracts keep your tenants comfortable and your equipment under warranty.
Rooftop Package Units, Done Right
Here is what our rooftop package units work covers: system design and installation, repairs on every major brand, seasonal maintenance, and licensed, EPA-certified technicians on every job. Same-day service for no-cool, no-heat and no-hot-water calls, 7 days a week. Free in-home estimates on new systems and replacements.
- Full-system design, sizing, and installation
- Repairs on every major brand, with parts on the truck for most first visits
- Seasonal maintenance that prevents costly breakdowns
- Licensed, EPA-certified technicians for every job
What's Included With Rooftop Package Units
Every rooftop package units visit covers the items below, and the scope and price are confirmed in writing before any work starts. When it's finished the technician walks you through what was done and what to watch for. We call back within one business hour, 7 AM – 10 PM.
- Crane scheduling and curb adapter fabrication when units aren't a drop-in match
- Gas, electrical, and refrigerant hookups to code
- Title 24 compliance documentation for commercial changeouts
- Startup, commissioning, and a walkthrough for your maintenance team
Need rooftop package units help in San Jose?
Related Services
Most rooftop package units jobs touch one of these, and the same licensed Promax team handles all of them. Each page lists what's included, typical costs and the questions San Jose homeowners ask most. Not sure which you need? Call (669) 777-1997 and we'll point you to the right one.
Where We Work
Promax Service Group serves homes and businesses in San Jose, across Santa Clara County, and in nearby Peninsula and East Bay cities. Same-day service for no-cool, no-heat and no-hot-water calls, 7 days a week. Choose your city for local details, or call (669) 777-1997 to confirm we cover your address.
Frequently Asked Questions
How long does a rooftop unit replacement take?
With the unit in stock and the crane scheduled, most single-RTU swaps are completed in one day — including disconnect, set, hookup, and startup. We coordinate the crane, permits, and inspections so your business barely notices.
What size rooftop unit does my building need?
Commercial spaces typically need roughly 1 ton of cooling per 300–500 sq ft, but ceiling height, occupancy, kitchen equipment, and window load change that substantially. We perform a proper load calculation rather than just matching the old nameplate.
Do you offer maintenance contracts for commercial HVAC?
Yes — quarterly or semi-annual plans that include filter changes, coil cleaning, belt and refrigerant checks, and priority emergency response. Regular maintenance is usually the difference between a 12-year and a 20-year RTU lifespan.