HVAC Installation in San Jose, CA
Frustrated by outdated HVAC equipment and skyrocketing bills? We handle full installs — ducts, zoning, and complete setup.
HVAC Installation in San Jose & the Bay Area
A complete HVAC installation is the one home upgrade you feel every single day for the next 15–20 years. Promax designs and installs full systems across San Jose and Santa Clara County: furnace + AC pairs, all-electric heat pumps, ductless multi-zone setups, new ductwork, zoning, and smart controls — engineered as one system rather than parts bolted together.
Your project starts with a free in-home assessment and load calculation, continues through permitted, code-compliant installation by our own employees (never subcontractors), and ends with commissioning, HERS testing, and a walkthrough of your new controls. Any rebate or incentive you qualify for is checked and handled for you — nothing assumed, nothing left on the table.
HVAC Installation, Built to Last
Every HVAC installation starts with a plan: a system sized to your home, the permits and testing the job requires, and a written quote you can review before you commit. Free in-home estimates on new systems and replacements. If you would rather spread out the cost, financing is available on approved credit.
- Proper load calculation, required permits, and HERS testing on every job
- We check every rebate and incentive you qualify for at your free estimate.
- Your written quote itemizes equipment, labor, permits, and every rebate you qualify for
What's Included With HVAC Installation
Every hvac installation project 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.
- Free in-home assessment and load calculation
- Permitted, code-compliant installation by our own employees
- Commissioning, HERS testing, and a controls walkthrough
- Rebate and incentive check included with every estimate
Need HVAC installation help in San Jose?
Related Services
Most hvac installation 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 full HVAC installation take?
Equipment-only changeouts: 1 day. Full system with new ductwork: 2–4 days. Complex zoned or VRF projects: up to a week. Your estimate includes a firm timeline, and we keep the home's comfort running as long as possible during the work.
What financing options are available?
We offer approved-credit financing plans including deferred-interest and low-APR terms, so you can pay for the system monthly with the energy savings offsetting part of the cost. Ask for current promotions when you book your estimate.
Why does contractor choice matter more than brand?
Industry studies show improper installation cuts system efficiency by up to 30% — sizing, refrigerant charge, airflow, and duct sealing are all workmanship. A mid-tier system installed perfectly outperforms a premium system installed badly, every time.