Commercial HVAC in San Jose

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Commercial buildings in San Jose ask a lot of their HVAC equipment. A North San Jose office floor full of people and monitors needs cooling most of the year, a strip-center shop in East San Jose bakes under a flat roof, and a Downtown restaurant has a kitchen that fights the dining room air conditioning every service. Cool Aid repairs, maintains and replaces commercial HVAC systems across the city, with rooftop package units as the everyday core of the work.

We have worked on commercial heating, cooling and refrigeration since 1966 from our base at 3511 Thomas Rd in Santa Clara, next to San Jose. For our full list of commercial services, see commercial HVAC services, commercial HVAC repair and commercial HVAC maintenance. This page focuses on what matters for a San Jose building owner, property manager or tenant.

Rooftop units under San Jose weather

Most low-rise commercial buildings in San Jose are served by rooftop package units. They sit in full sun through hot, dry summers, and that is when the weak parts show up: condenser fan motors, capacitors, contactors and compressors that have been running hot for years. Dust and debris build up on condenser coils over the dry months and cut capacity just when the building needs it most.

In some seasons wildfire smoke adds another load. When outdoor air quality drops, we can check that economizer dampers and outside-air settings behave the way you expect, and that filters are sized and rated for the unit's airflow. A clogged filter bank during a smoke event can freeze a coil and take the unit offline.

Winter nights are cool and damp rather than harsh, but gas heat sections on rooftop units still need attention: ignition, burners, heat exchangers and venting. Where a rooftop unit has a gas section, we check it before the heating season, not after the first complaint.

Buildings we work in around San Jose

• Offices and tech space in North San Jose and Downtown. Long cooling seasons, after-hours comfort requests, and IT closets that often ride on building HVAC. If yours does, read our server room cooling in San Jose page.
• Retail centers across Berryessa, Blossom Valley, East San Jose and West San Jose. Multiple tenants on multiple rooftop units, where one failed unit means one unhappy tenant and a call to the property manager.
• Restaurants and food businesses. Kitchen heat, makeup air and hood exhaust interact with dining room cooling, and the same technician visit can cover the refrigeration. See restaurant HVAC and refrigeration in San Jose.
• Medical and professional offices. Patients and clients notice uneven temperatures quickly, and short cycling or weak airflow in one suite is often a duct or zoning issue rather than a failed unit.

A San Jose example: Lotus Thai

Lotus Thai in San Jose is a good example of how we like to work with a business. We handle preventive maintenance on its HVAC and refrigeration, and we are also the call when something fails. Because the same team sees the equipment on routine visits, an emergency call starts with a technician who already knows the units, where they are, and what has been replaced before.

Preventive maintenance for commercial systems

A commercial maintenance program is scheduled around your building rather than a generic calendar. For most San Jose properties that means a spring visit focused on cooling ahead of summer heat, and a fall visit focused on heating and economizer operation. A typical rooftop unit visit includes:

• Filter change, with the rating matched to the unit and your air quality needs
• Condenser and evaporator coil inspection and cleaning
• Belt, bearing and motor checks on blowers and condenser fans
• Capacitor, contactor and electrical connection tests
• Refrigerant pressure and temperature readings
• Condensate drain and pan cleaning to prevent roof and ceiling leaks
• Economizer, thermostat and control checks
• Gas heat section inspection where equipment has one

After each visit you get a written summary of what we found and a ranked list of recommended repairs, so you can budget instead of reacting.

Replacement, permits and refrigerant changes

When a rooftop unit reaches the end of its life, replacing it in San Jose involves more than a crane lift. Commercial equipment replacements generally go through the City of San José's permit process, and we confirm what applies to your building before work starts. New equipment is also moving to lower-GWP refrigerants. Our technicians are trained on R-32, R-454B and R-290, so we can service new units and advise on how a mixed fleet of older and newer equipment will be maintained.

Your electricity supply matters for operating cost too. Many San Jose businesses buy their power through San José Clean Energy, the city's community electricity provider, with PG&E delivering the power and supplying natural gas for heating sections. Efficient equipment and clean coils keep that energy bill down regardless of which provider you use.

Licensing, brands and warranty

Cool Aid holds California C-20 (HVAC) and C-38 (refrigeration) licenses, and our technicians are EPA Universal certified. We work on commercial equipment from Daikin, Amana, Goodman, York, Trane and Carrier, among others. Every job is backed by our 1-year parts and labor warranty. Our senior refrigeration technician Dao Nguyen works on rooftop HVAC as well as walk-ins, reach-ins and ice machines.

When a system fails outside business hours, see emergency HVAC repair in San Jose. If you are comparing contractors, our list of commercial HVAC companies in San Jose includes firms other than ours. For everything we do in the city, go back to the San Jose HVAC and refrigeration overview.

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Frequently asked questions

Written and reviewed by Jim McKinny, owner of Cool Aid Air Conditioning & Refrigeration — California C-20 and C-38 licensed, EPA Universal certified, second generation of a family business serving the Bay Area since 1966. Every job we complete is backed by our 1-year parts & labor warranty.