We Make Buildings
Work… Better!

Casto Technical Services – Charleston, WV

Casto Technical Services has been providing 24/7/365 mechanical services for commercial, institutional and industrial clients for over 50 years. We don’t just know buildings; “We know building systems”. From installation to service, Casto understands your building environment and what it takes to keep that building running smoothly, while keeping your occupants comfortable and happy.

Casto takes pride in knowing our experienced and highly trained team is committed to reducing your energy costs by providing the right person, equipped with the right technology and tools to get the job done, quickly and efficiently.

For comprehensive HVAC systems and services including installation, preventative maintenance, emergency repairs and complete design services, Casto Technical Services wants to be your partner.

We Make Buildings Work… Better!


Where does your building energy usage rate?


Castro Tech Staff

HVAC Commercial Services

As the region’s longest standing HVAC Contractor, we deliver the best service available. Our trained experienced techs are ready to keep your equipment running.


Energy & Intelligent Services

Whether your building needs precise temperature control or your goal is energy efficiency and conservation, Casto Technical Services can get the job done.


Building Automation Services

Building automation is key to efficiency and building optimization.  Casto uses non-proprietary software to seamlessly integrate any automation system.

Engineered solution

Designed Solutions

Looking for a system for new construction or is it time to upgrade your current HVAC system?  Our experienced team is here to help.


5-star work. An incredible, professional company. Highly recommended!

Skyler Barnhart
Wonderful people to work with – highly recommend!
Ashley Willard


Phone: 800-232-2221

Email: info@castotech.com

If you have an issue, you want to talk to someone that’s been there. We’re here to help; on the phone or on the site. Customers need answers, not more questions. Fill out the form and we’ll be right with you!