Casto Technical Services would like to assure our customers that we will continue to provide quality service during the Coronavirus pandemic. We are taking every precaution necessary to keep our employees and customers safe and healthy. During this time, we are offering our hospital and medical center customers more service if needed. Please feel free to contact us with any questions or concerns.

Markets Served

Casto Technical Services - HVAC company in Charleston, WV

We Make Buildings
Work… Better!

Casto Technical Services, Inc. (CTS) has been a locally owned and operated HVAC company in Charleston, WV since 1965. Casto has been known as the region’s most trusted HVAC provider to hospitals; schools; law offices; government facilities; military institutions; data centers; correctional centers; retail businesses; industrial facilities; large corporate buildings; and more. Our technicians are certified to service all makes and models of equipment. We have customers throughout the entire state of WV and sections of OH, KY, MD, VA, and PA.

CTS is comprised of the following departments:

  • Operations                                                    
  • Service 
  • Retrofit and Installation (R&I)
  • Building Automation Systems (BAS)
  • Intelligent Services
  • Parts

Our technical capabilities range from basic HVAC technical support (e.g. air filter service, coil cleaning, belt changes, preventative maintenance, etc.) to troubleshooting and repairs on equipment such as boilers, chillers, air handlers, rooftop units, and control systems. Furthermore, we offer intelligent services and energy monitoring that cannot compete with any other HVAC company in the state.

We are available 24-hours a day, 7 days a week. Contact us today to schedule exceptional service.

From the Owner

Nate Castro - Casto Technical Services - HVAC company in Charleston, WV

Nate Casto began his career at Casto Technical in 1975. As president, Nate has managed the company through 40 of Casto’s 50+ years of business. While building the company, Nate worked in and first filled many of the roles in the organization. Beginning as a service technician helper, Nate worked in the parts warehouse, as service coordinator, and as account manager. As he grew the organization, Nate filled these roles and began managing the business.

Nate is very proud of the organization. Most importantly, Nate believes that the Casto team is a superior organization, that is continuing to grow and build a reputation for excellence in the industry. Nate will always testify that the success Casto Technical enjoys is due entirely to the work of highly qualified associates working as a team.


Phone: 800-232-2221


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