HVAC Commercial Services in Charleston, WV and Surrounding States

When you call Casto Technical Services, we have the commercial heating and cooling technicians available to get your HVAC unit up and running. We take pride in our fast service response times, so much so that many of our customers agree!

Thanks once again for lending your technical expertise to our need. I am back from Baltimore and in the building this a.m. and all is working well.  R. Williams

“…unit is performing better than it ever has, Ray is a great technician, it’s a joy doing business with your company,… G. Grant

I wanted to let you know about this technician that was out to our office a few days ago. There have been many issues with the HVAC in this office since I have been here. We have seen many technicians come and go, but Larry was amazing! He came in and fixed all of the issues and everything is finally running smoothly. He was also extremely pleasant and helpful. I didn’t know who else to direct these comments to, but I feel that he deserves the recognition! I wanted to make sure that I let someone know about his excellence in service and attitude! B. Maley

Casto Tech has served the capital city and its surrounding areas for more than 50 years. We provide 24/7 institutional, industrial, and commercial HVAC repairs, 365 days per year. We are committed to providing you the best quality service and tools to get the job done right. Casto’s service technicians can install, service, and maintain all brands of HVAC units and mechanical systems to ensure that you have peace of mind.

Capabilities Include:

Emergency Repairs

Customized Preventative Maintenance Programs

Remote Inspections


Backflow Prevention Testing

Commercial Systems we service include:



Cooling Towers

Air Handling Units

Unitary Equipment

Roof Top Equipment

Plumbing Systems

Building Automation Systems (DDC controls)

VRF Systems