From mechanical equipment analysis and standard energy retrofits to the installation of complex and integrated open protocol control systems, Havel promises state-of-the-art expertise and customer-centered service. Learn more.

OTC Parts

Downtime isn't an option for your mission - critical systems. Call Havel for fast HVAC, control parts and variable frequency drives. Learn more.



EMCOR recognizes the leadership and technical skills military candidates have to offer.

Visit our military microsite and see some of the job opportunities available.

Meet Our Leader

JJim Witzenman helps oversee Havel’s operations to ensure that your mechanical systems and HVAC controls run smoothly.Jim Witzenman, LEED® AP and Senior Vice President/Division Manager of Havel, is just one of the many people that deliver high-performance facilities projects that meet our clients most exacting standards.