Quality Heating & Air Conditioning Service



Business Hours: 8 am to 5 pm Monday – Friday

24 Hour Emergency Service

Get Your Free Estimate Today!


Looking to upgrade or replace that aging system call us now for a free estimate on your new install.  Every estimate takes into account your custom housing and budget needs and includes free training on how to get the most out of your system.

Light Commercial

Professionally trained and certified technicians can service all brands of Residential and Industrial HVAC equipment including Bryant, Carrier, Coleman, Honeywell, York,  American Standard and many more.

Customer Guarantee


At Nor Cal Mechanical, owner James Costello, personally guarantees customer satisfaction.


Nor Cal Mechanical works hard at delivering 100% customer satisfaction.

Specializing in custom home installations and retrofits installations in Heating and Air Conditioning Services to the Bay Area for over 10 years, finding solutions to jobs that others said were impossible.

HVAC Filters Affect Indoor Air Quality

The average American spends over 80% of their time indoors. For urban residents, infants and the elderly this percentage is likely to be even larger. Recent studies show that indoor air pollution is regularly two to fives times higher than outdoor air pollution. This...

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Humidity: Controlling it is not only a summer issue

Overly dry air is one of the worst aspects of winter. Not only is it uncomfortable, but it can also cause real problems for your health and the health of your home and its contents. Both portable and central humidifiers help keep the humidity in the ideal range from...

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Choosing a New Heating System

A home heating system no matter how well maintained will eventually wear out. When it does it needs to be replaced, many people feel it is easier to replace their heating systems with the same type but that may not be the best plan.   Before you replace your system,...

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Nor Cal Mechanical has been taking good care of our home heating and cooling system since 2009 when he replaced our old, inefficient furnace that was in a hall closet with a beautiful new furnace with a HEPA filter in the attic, including all the new vent work needed.  And he freed up closet space!

He now checks things out once a year and is always available if we have questions about anything.

James, the owner of Nor Cal Mechanical, is delightful to work with – one of the nicest guys I know – and truly knowledgeable about all things HVAC.  We were lucky to find him!

Deb Droz

Home Owner

While President of King Air Conditioning, Inc. James served as VP of Construction. His primary responsibilities included system design, layout, and supervision of all HVACR retrofit and installations. From 1997 to 2000, James also managed our Legacy Chiller Manufacturing Division. James is a highly results driven Manger with a unique ability to lead others in a very competitive marketplace.

Martin King

CEO, Legacy Chiller Systems, Inc.

     Call Us Today!  408-333-9700

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More Info

Call us today to connect with a member of our professional and knowledgeable staff at Nor Cal Mechanical. We take pride in finding the solution that best serves you and your family.

P.O. Box 20716
San Jose, CA 95160

Office: 408-333-9700
Mobile: 650-537-6397
Fax: 408-865-7934

Email: info@norcalmechanical.net

Business Hours: 8 am to 5 pm Monday-Friday
24-Hour Emergency Service

Nor Cal Mechanical

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