Juan Diaz is the Co-Director and Instructor at DoHVAC Trade School. Juan has more than 20 years of experience in the HVAC field.  At the beginning of his career, Mr. Diaz went to work servicing both residential and commercial A/C units all over Houston area as a HVAC Technician. 


He continued to work in HVAC during his employment managing high-rise buildings. It was here that Mr. Diaz acquired 

significant experience in commercial HVAC systems, He has attended numerous other seminars on cooling towers, R-410

refrigerant, and kept up with all continuing education training required of license holders. 


Working in the high rise offered experience with chillers, boilers, cooling towers, and all the many different components of high

rise HVAC. Promotions allowed for Mr. Diaz to experience the HVAC field from the building management point of view. During

this time he was responsible for multi-floor build outs, hiring the mechanical work, and running the in-house construction and

maintenance departments.


For the most part of his career, as owner-operator of Diaz Services Air Conditioning & Heating, Mr. Diaz was responsible for thousands of jobs from simple residential work repairs to large commercial HVAC projects. With his past knowledge, he took his business to a prominent position as a select commercial contractor in Houston.


Having spent time on both sides of the fence, Mr. Diaz knows what customers want from HVAC contractors and what services are least covered by the industry.

Under his management, there have been controls designed and installed for pumps, computer room temperature alarms, water under the floor alarms, and power loss alarms. Custom designed timer systems can shut down multiple units during unoccupied times. Mr. Diaz has a railroad commission exemption that allows service and installation of propane-fueled equipment and stays current with all changes in the industry. He keeps up with many trade publications and stays prepared for changes that affect his customers and employees.


Mr. Diaz noticed a continued shortage of qualified and dedicated service technicians.

The biggest challenge in running an air conditioning company constantly came back

to a lack of quality and quantity in the job pool. Mr. Diaz decided to open DoHVAC

Trade School to fill a need that keeps growing. He wanted to take his years of experience

in residential and commercial service and apply it to this training center.

Mr. Diaz designed the school and program to replicate actual conditions. Over the years of hiring technicians that were “trained”, he realized they had not received the type of training that could actually put them to work. Mr. Diaz has designed a unique program that will teach each part of the program separately with mostly hands-on effort. Students who pass the final exam will have completed their first installation and will be ready to go to work.


Students will also have been taught that this is only the beginning and that education in this field never stops. Using Mr. Diaz's work history as an example, students will see the potential available to hard working and motivated individuals who start with the proper training and continue learning.

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