As Featured in the PBS Documentary, “Building Below Zero”
Western Allied is the design build contractor that helped the Electrical Training Institute achieve net zero plus.
What We Can Do ?

Our Services.

New Construction

Western Allied has been building HVAC systems for over 55 years. Nobody does it better. Let us get it right the first time.


Providing HVAC solutions directly to building owners as the prime contractor as well as working in a subcontractor role.

Service & Maintenance

We employ the greatest technicians and by far the highest ratio of degreed engineers to field techs in the industry.

Design & Build

Proven track record in office building, hotel, retail, biotechnology, clean room, industrial manufacturing, and entertainment facilities on a design/build basis.


Achieving Net Zero Energy and More!

The Electrical Training Institute (ETI) located in Commerce, California, decided to achieve net zero plus (NZP) status for all of the right reasons. A...
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Your Ears: Your Best Diagnostic Tool

Don’t  laugh.  I  often  get  that  reaction  when I  tell  people  that  the  single  best  diagnostic  tool  that  we  possess ...
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Humidifiers; Why Don’t They Work Right?

Obviously,  some  humidifiers  don’t  work  simply  because  they  were  not  maintained  properly.  Others  don’t  work  because ...
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Why Choose Us.

Western Allied Corporation has been an industry leader in HVAC for over
55 years. Headquartered in Santa Fe Springs, CA, Western Allied is owned
and operated by the industry’s most highly trained and qualifed personnel.
Our facilities include in-house sheet metal and piping fabrication as well as proficiencies in stainless steel, black iron, galvanized, copper, PVC and other piping systems. We have a long and successful history of direct digital control (DDC) installation and support. We were the frst mechanical contractor to achieve LonWorks System Integrator status in Southern California.

Our mission is to foster a culture of knowledge, trust, and dependability within our company and implement those principles in our valued customer relationships. In addition, we strive to provide exceptional service through design, installation, and maintenance of HVAC systems.

Each of the partners at Western Allied is the head of a project team. Each team works with the company’s clients in order to see a project from inception to completion. This means that each team is responsible for; conceptual design, estimating, project management and project closeout and turnover. We feel that this structure is advantageous because it provides our clients with consistent points of contact throughout a project and ensures that an owner of Western Allied has direct involvement in and oversight of every project that the company is involved with.


We have been building HVAC systems for over 55 years. Nobody does it better.


Great technicians and by far the highest ratio of degreed engineers to field techs in the industry.


The leader in both generic and integrated LonWorks & BACnet controls in Southern California.


An art as much as it is a science. Proven engineering judgment produces value by expertly blending old with new.

Our Clients.