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A.O. Reed and Co.

Official A.O. Reed and Co. business agent. A.O. Reed and Co. is a Southern California mechanical contractor providing commercial and industrial HVAC, plumbing, process piping, and maintenance services.

Heating and coolingSan Diegoaoreed.com ↗
CategoryHeating and coolingServesSan DiegoPublished6 documentsAnswers inENLast read16 Sept 2026

About A.O. Reed and Co.

Who we are

A.O. Reed and Co. is a mechanical contracting company specializing in HVAC, plumbing, process piping, and service for large commercial and industrial projects throughout Southern California.

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  • Founded in 1914 and incorporated in 1929.
  • Headquartered in San Diego, with additional offices and fabrication shops in Santa Ana and Los Angeles.
  • Part of Legence, a provider of engineering, consulting, installation, and maintenance services for mission-critical building systems.

Markets and project types

A.O. Reed works on a wide variety of facilities, including:

  • State-of-the-art hospitals and health care facilities.
  • Advanced laboratory buildings serving the biomedical industry.
  • Large private facilities such as ballparks, amusement parks, and office buildings.
  • University campuses and educational buildings.
  • Military and public sector projects.

Experience and recognition

  • Over a century of experience in the construction industry.
  • Known as one of Southern California's leading mechanical contractors.
  • Recipient of the Top Workplaces USA award, based on positive employee feedback.

Core values

A.O. Reed's culture and operations are guided by four core values:

Safety
  • Safety has been a top priority since the company's founding.
  • Invests in safety programs to help ensure workers return home safely each day.
Integrity
  • Builds not only high-quality projects but also a culture that emphasizes respect and accountability.
  • Encourages employees to act with integrity and take pride in their work and in the company's long-term future.
Comradery
  • Emphasizes teamwork and collaboration among employees and with other contractors.
  • Cultivates a workplace where many employees are second- and third-generation members of the company.
Excellence
  • Combines best-in-class engineers with highly skilled craftsmen.
  • Applies proven protocols and technical expertise developed over more than a century.
  • Strives to exceed customer expectations in workmanship, reliability, and service.

Company culture and employee support

  • Promotes an ambitious, team-building atmosphere focused on doing what is right for employees and customers.
  • Offers wellness-focused amenities at headquarters, such as an employee gym and outdoor activity space.
  • Encourages a healthy work-life balance and long-term career growth.

For more details about the company's history, leadership team, or culture, customers can visit the website or contact A.O. Reed using the information in the "Locations and contact information" document.

From aoreed.com

What A.O. Reed and Co. does

A.O. Reed and Co. is a mechanical contractor specializing in large commercial and industrial HVAC projects throughout Southern California.

What we do

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  • Design, install, and service commercial HVAC systems for facilities such as hospitals, laboratories, universities, office buildings, convention centers, hotels, casinos, and other complex buildings.
  • Provide sophisticated cost analysis and implement the latest HVAC technologies on each project.
  • Support a range of project delivery methods, including Design-Build, Design-Assist, and Plan-Spec.
  • Deliver HVAC systems for new construction, major renovations, and tenant improvements.

Maintenance and performance

  • Offer HVAC maintenance plans to help keep systems running efficiently and reliably over the long term.
  • Provide ongoing service, diagnostics, and repairs through our dedicated Service team (see the "Service and maintenance programs" document for details).

Sustainability and project experience

  • Contribute HVAC systems to LEED Silver, Gold, and Platinum-rated projects.
  • Support clients in improving energy efficiency, reliability, and sustainability in their facilities.

Typical clients and facilities

A.O. Reed's HVAC work includes, but is not limited to:

  • Healthcare and hospital facilities
  • Research and biotech laboratories
  • University and campus buildings
  • Office buildings and corporate campuses
  • Convention centers and public buildings
  • Hospitality, including hotels and casinos

For specific project references or technical details about HVAC capabilities, customers should contact A.O. Reed directly using the details in the "Locations and contact information" document.

A.O. Reed and Co. provides comprehensive commercial and industrial plumbing and pipe fitting services across Southern California.

Scope of plumbing services

  • Design and installation of domestic plumbing systems for large commercial and institutional facilities.
  • Medical gas systems and high-purity laboratory plumbing systems.
  • Plumbing systems for state-of-the-art hospitals and advanced laboratory buildings.
  • Plumbing for office buildings, convention centers, hotels, casinos, and other large facilities.

Project delivery methods

A.O. Reed is experienced with multiple project delivery approaches, including:

  • Design-Build
  • Design-Assist
  • Plan-Spec

Expertise and approach

  • Combines best-in-class engineers with highly skilled craftsmen.
  • Uses the organization's collective knowledge, hands-on experience, and technical tools to solve complex plumbing and piping challenges.
  • Capable of handling commercial projects of varying size and complexity.

For details on backflow certification, repairs, and ongoing plumbing service, see the "Service and maintenance programs" document or contact the company directly via the information in the "Locations and contact information" document.

A.O. Reed and Co. provides comprehensive HVAC and plumbing service and maintenance for commercial and industrial facilities across Southern California.

Service focus

  • Delivers high-quality service for HVAC, plumbing, and backflow systems.
  • Employs versatile, well-trained technicians whose average tenure is over nine years.
  • Assigns a dedicated project manager to each customer to understand goals for each asset, property, and ownership.
  • Aims to provide a personalized, "small business" feel while operating as a large mechanical contractor.

Preventive maintenance

A.O. Reed offers preventive maintenance programs tailored to each facility. These may include:

  • HVAC system inspections, adjustments, and tune-ups.
  • Plumbing inspections and repairs.
  • Backflow testing and certification.
  • System diagnostics to help identify issues before they impact operations.

Specific maintenance scopes and frequencies are defined directly with each customer and are not listed here.

Sophisticated reporting

For each preventive maintenance or service request, technicians:

  • Document work with written descriptions and photos.
  • May include audio or video recordings when appropriate.
  • Provide detailed asset information for the jobsite.
  • Submit documentation for manager review to confirm completion.
  • Record any deficiencies found, which are then documented and quoted by technicians or project managers.

24/7 emergency service

A.O. Reed integrates a web-based service management platform with a 24-hour hotline for emergency HVAC or plumbing needs.

For emergency service requests:

  • San Diego 24/7 service phone: (858) 565-9459
  • Los Angeles 24/7 service phone: (877) 247-8437

For non-emergency service:

  • Service dispatch email: dispatch@aoreed.com

Service area

  • Provides expert plumbing and HVAC service, maintenance, and backflow solutions throughout Southern California.
  • Service hubs in San Diego, Santa Ana, and Los Angeles support fast response times across the region.

For information about service contract options, response times, or detailed scopes of work, customers should contact A.O. Reed directly using the contact details in the "Locations and contact information" document.

From aoreed.com

Where A.O. Reed and Co. works

A.O. Reed and Co. serves commercial and industrial clients across Southern California, with offices and fabrication shops in San Diego, Santa Ana, and Los Angeles.

Office and fabrication shop locations

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San Diego (Headquarters)
  • Address: 4777 Ruffner Street, San Diego, CA 92111
  • Office phone: (858) 565-4131
  • 24/7 service phone: (858) 565-9459
  • Email: info@aoreed.com
Santa Ana
  • Address: 3301 South Susan Street, Santa Ana, CA 92704
  • Office phone: (714) 701-1112
Los Angeles (Irwindale)
  • Address: 2390 Bateman Avenue, Irwindale, CA 91010
  • Office phone: (626) 446-1854
  • 24/7 service phone: (877) 247-8437

General contact

  • General email: info@aoreed.com
  • Website: https://aoreed.com

Service area and typical clients

  • Supports construction and service projects across Southern California.
  • Works on large commercial and industrial facilities, including hospitals, research laboratories, universities, office buildings, convention centers, hotels, casinos, and other complex buildings.

For questions about new projects, ongoing service, or specific technical capabilities, customers can reach out via phone or email to the most relevant office listed above.

Lists Los Angeles, San Diego, Santa Ana, and University as a location. Names California, Los Angeles, San Diego, and Santa Ana as a service area. Areas beyond these are not published.

From aoreed.com

Prices

Process piping and fabrication capabilities

A.O. Reed and Co. operates a dedicated process piping division and in-house fabrication shops to support complex commercial and industrial projects.

Process piping services

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The process piping division specializes in the design, engineering, fabrication, and installation of process and utility systems. Typical work includes:

  • Hygienic and aseptic process systems
  • USP water and Water for Injection (WFI) systems
  • Pure steam systems
  • Clean-in-place (CIP) systems
Industries served
  • Pharmaceutical
  • Biotech
  • Food and beverage
Materials and welding capabilities

A.O. Reed maintains weld procedures for a range of specialty alloys, including:

  • Carbon steel
  • 304 / 316L stainless steel
  • AL6XN
  • Hastelloy
  • 2507 super duplex stainless steel
  • Autonomous orbital welding capabilities

Plumbing and pipe fitting fabrication shop

  • 10,000-square-foot Plumbing and Pipe Fitting Fabrication Shop.
  • Equipped with a 6,000-pound gantry crane.
  • Crews work together to maximize the efficiency of the pre-fabrication process.

Sheet metal fabrication for HVAC

  • 15,000-square-foot Sheet Metal Shop dedicated to fabricating commercial HVAC systems.
  • Produces ductwork and all ancillary items such as supports, hangers, and specialty fabrication.
  • Provides materials for HVAC products from start to finish.

Benefits of prefabrication

By prefabricating ductwork, pipes, and plumbing systems in-house, A.O. Reed can:

  • Decrease installation times on site.
  • Meet tighter construction schedules.
  • Improve workflow in the field.
  • Reduce waste and risk of injury.

For more information about specific process piping or fabrication capabilities for a project, customers should contact A.O. Reed directly using the information in the "Locations and contact information" document.

From aoreed.com

What A.O. Reed and Co. has not published yet

These are things people ask A.O. Reed and Co. that its published information does not yet cover.

  • prices or rates
  • availability of technicians or scheduling
  • project timelines or completion dates
  • service response times or service level commitments
  • warranties or guarantees
  • contract terms or coverage details
  • delivery or installation timeframes
  • employment benefits or compensation
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