O.C. McDonald
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O.C. McDonald
A full-service mechanical contractor, OC McDonald provides comprehensive design, installation and service for commercial new construction or retrofit. Our single-source approach allows us to manage all aspects of a project, reducing potential complications and minimizing costs for our customers.

O.C. McDonald Company, Inc. has been the Bay Area's most respected Mechanical Contractor for over a century, specializing in HVAC, plumbing, process piping, building services, direct digital control systems and building automation systems.With over 100 years experience in heating and cooling, from basic to custom installations, we have the expertise to complete any job.

Our technicians will work with you to find the best options for your needs. Your emergency is our emergency! When time is not on your side, call O.C. McDonald's 24-hour live operator and we'll have one of our many experienced technicians address your issue with speed!
Services
O.C. McDonald Company has been one of the Bay Area's leading plumbing, process piping and HVAC contractors and service providers for over a century, making it the oldest such company in the valley.
Founded in 1906 in San Jose, California, O.C. McDonald installed the first air conditioning system in the city.
It was founded by Oren Charles McDonald in 1906 and is currently owned and run by Jim McDonald, the founder's great grandson.
We are known for having excellent quality workmanship and have accomplished some of the most complicated installations in the valley.
Navisworks - allows us to assemble a virtual model and coordinate with other job contractors.
This promotes the handling conflict resolution prior to actual construction.
O.C McDonald offers services to help facilitate all aspects of the design process from preconstruction to economic analysis.
Effective building controls are essential to the proper functioning of an air conditioning system.
O.C. McDonald offers the appropriate tools to help maintain operational command and control.
There are many options available; from a simple programmable thermostat to complex, software-driven Direct Digital Controls (DDC).
O.C. McDonald Company, Inc. has been the Bay Area's most respected Mechanical Contractor for over a century, specializing in HVAC, plumbing, process piping, building services, direct digital control systems and building automation systems.
We serve a wide range of industries including LEED Certified projects, data centers, high tech clean room construction, process tool installation/fit up, heavy industrial piping, commercial, institutional, healthcare and hospitality.
Our engineered and fabrication/shop drawings incorporate 3D modeling with BIM coordination.
Whether you need to repair, replace, upgrade or maintain your heating and air conditioning system, O.C.McDonald has done it.
In fact, we've done it for over 100 years.
Our certified technicians can service most brands of HVAC and we partner with industry leaders to offer the highest quality equipment at the best possible price.
With a combination like that, we're sure to get the job done-and done right.
We help save you money before any work begins so you know exactly what it costs and what's going to be done.
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