Sales & Support


We service all brands and manufacturers of Heating, AC, Plumbing and Refrigeration equipment; and most Direct Digital Controls systems. We provide service and solutions for any aspect of a building's mechanical system. 

Direct Digital Controls

We service and install a majority of D.D.C systems. We offer you the capability to upgrade or add new controls for your building without having to remove your existing system. With our company, you own the system. You can access it and adjust it, with our team on call for any issues or support.

Design Build

We determine what your needs are, and design mechanical and controls systems that are efficient, practical and affordable. We offer state of the art AutoCad design drawings, electronic operations, and maintenance manuals. 

Preventive Maintenance

Our custom designed Preventive Maintenance programs executed by our team of experienced professionals will keep your mechanical systems running efficiently and minimize emergency repairs. 



Climate Systems, Inc. was founded in May of 1995.

We are a full-service Heating, Ventilating, Air Conditioning and Refrigeration provider. We specialize in a complete range of products and services, including the design and installation of new equipment, retrofits of existing systems, mechanical plumbing systems, sheet metal fabrication, direct digital controls and comprehensive maintenance programs and emergency service.

We provide a place where our employees are treated like family; a place where they can perform to their full capacity to best serve the needs of our customers. 


In Loving Memory 

Our company was founded by Leonidas Ioannou. He was an incredibly smart business man who truly cared about the people in his life. He is lovingly described as a man with a big heart. 

His untimely passing in 2018 has saddened many. We are grateful for his efforts in building such a great company - he will be sorely missed. 



For any inquiries, questions or commendations, please call: 802-660-9969 or fill out the following form


177 Avenue C, Ste 110

PO Box 914

Williston, VT 05495


Tel: 802-660-9969

Fax: 802-863-0343


We are always looking for the right candidate! If you are an experienced and qualified HVAC service technician interested in joining our service team, please apply. 

To apply for a job with Climate Systems, Inc., please send a cover letter together with your resume to: contactus@climatesystems.com

Applications are available to be picked up in the office, or open the PDF to print the application.

Get a quote: 802-660-9969


Year Established
Accredited since 2010
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