Partnering with Casto Tech!


A building in 90° weather and no air conditioning is a major problem. 

We understand! 

Occupant comfort is our ultimate goal. 

When you call Casto we have the technicians available to get you up and running…we take pride in our fast service response times.  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 Technical takes pride in knowing our service technicians are professional and highly trained to service and repair all brands of HVAC equipment.  We have been providing 24/7/365 mechanical services for commercial, institutional and industrial clients for over 50 years. We are committed to providing the right person, equipped with the right tools to get your job done right. Casto Tech’s Service Technicians can install, service, and maintain all brands of HVAC and mechanical systems to ensure that you have peace of mind when you call Casto.

Let us develop a preventative maintenance program that suits the needs of your personnel, facility and HVAC systems.

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