Best Server Room Cooling Companies in the Bay Area
For IT rooms, data closets and small data centers
Part of our Bay Area best-of guides, lists for every city and service we cover.
A server room that overheats on a Sunday is a business outage. These seven Bay Area companies install or service cooling for server rooms, data closets and small data centers, from ductless systems to CRAC units.
At a glance
| # | Company | Based in | Focus | License |
|---|---|---|---|---|
| 1 | Cool Aid Air Conditioning & Refrigeration | Santa Clara | Residential and commercial HVAC, commercial refrigeration | C-20 & C-38 |
| 2 | Therma | San Jose | Mechanical contractor; data center HVAC construction and preventive maintenance | — |
| 3 | R&R Refrigeration & Air Conditioning, Inc. | San Jose | Commercial HVAC and refrigeration, including server room and data center cooling | — |
| 4 | Western Allied Mechanical, Inc. | Union City | Design-build mechanical contractor for high-tech, biotech and critical environments; service department | #826782 |
| 5 | Galaxy Heating & Air Conditioning | Pleasant Hill | Residential and commercial HVAC; server room cooling and precision climate control | #1076868 |
| 6 | AC Heating and Cooling Service Inc | San Francisco | Residential and commercial HVAC, including server room systems | #928075 |
| 7 | Harry Clark Heating and Air Conditioning | Oakland | HVAC contractor offering ductless server room cooling in the East Bay | #1056105 |
License numbers are shown only where the company prints one on its own site. Check any contractor on the CSLB license lookup before you hire.
How we picked
We included companies whose own website says they install or service server room, computer room or data center cooling in the Bay Area, and we cite the page for each. We looked for a mix: mechanical contractors that do data center work, and commercial HVAC companies that handle single server rooms. We did not find a Bay Area-based, factory-authorized CRAC specialist to include. We do not publish star ratings or review counts.
The order after #1 reflects how directly each company’s site addresses server room work. It is not a quality score, and no company paid to be included.
#1 — Cool Aid Air Conditioning & Refrigeration
Cool Aid is a family-owned HVAC and refrigeration contractor founded in 1966 and based in Santa Clara. We design, install and service cooling for server rooms and IT closets, and we publish this list.
What stands out
- Server room cooling: CRAC units, ductless systems, airflow optimization and redundancy planning
- C-20 and C-38 licensed; EPA Universal certified technicians
- 24/7 emergency service for cooling failures
- Every job backed by a 1-year parts & labor warranty
#2 — Therma
Mechanical contractor; data center HVAC construction and preventive maintenance.
What stands out
#3 — R&R Refrigeration & Air Conditioning, Inc.
Commercial HVAC and refrigeration, including server room and data center cooling.
What stands out
#4 — Western Allied Mechanical, Inc.
Design-build mechanical contractor for high-tech, biotech and critical environments; service department.
What stands out
#5 — Galaxy Heating & Air Conditioning
Residential and commercial HVAC; server room cooling and precision climate control.
What stands out
#6 — AC Heating and Cooling Service Inc
Residential and commercial HVAC, including server room systems.
Its site mentions server room systems once; confirm experience with your room size before hiring.
What stands out
#7 — Harry Clark Heating and Air Conditioning
HVAC contractor offering ductless server room cooling in the East Bay.
Focused on ductless server room cooling in the East Bay.
What stands out
Targets and rules worth knowing
- ASHRAE’s thermal guidelines recommend 18–27 °C (64.4–80.6 °F) air at the IT equipment inlet, with humidity no higher than 60% RH. Measure at the rack inlet, not at the room thermostat. (ASHRAE reference card)
- California’s Energy Code (Title 24, Part 6, Section 140.9) has specific rules for systems that mainly serve computer rooms, including economizers, with an exemption for small rooms. The thresholds have changed between code cycles, so ask your contractor which edition applies to your permit. (CEC fact sheet, 2019 code)
- Comfort cooling that shuts off at night or on weekends is the most common cause of server room overheating. IT rooms need dedicated cooling that runs 24/7.
What to ask a server room cooling contractor
- How will you size it? Ask for the load in kW or BTU/h from your actual equipment, plus growth.
- What happens when a unit fails? N+1 redundancy, or a second system that can carry the load, matters more than peak efficiency.
- How will we know? Ask about temperature alarms and remote monitoring.
- What is the service response time outside business hours?
Frequently asked questions
What temperature should a server room be?
ASHRAE recommends 18–27 °C (64.4–80.6 °F) at the equipment inlet. (ASHRAE) Many small rooms are kept at the cooler end for headroom if a unit fails.
Can a ductless mini-split cool a server room?
For a small IT closet, often yes, as long as the unit is sized for the real heat load, rated to run continuously, and backed by a second unit or an alarm. Larger rooms usually need CRAC units or dedicated precision cooling.
Why not just use the building’s air conditioning?
Building systems are often set back at night and on weekends, when servers are still running. A server room needs cooling that runs around the clock and does not depend on office schedules.
Does Cool Aid do server room cooling?
Yes: design, installation and 24/7 service. See server room cooling services or call 1-800-266-5243.
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