Full Service Commercial & Industrial HVAC Contractor

JS Thomas Service is a principal operated full line mechanical service company that has been serving the mechanical needs of commercial, industrial and institutional clients in the Atlanta metro area with fast, reliable HVAC service since 1973.  We offer a complete range of services including:

HVAC Systems Maintenance
HVAC Systems Service and Repair
• Turnkey Equipment Retrofits
Controls and Automation
• 24 Hour Emergency Service
• Personal Attention
• Experienced Commercial HVAC Technicians

Our team of factory trained HVAC technicians service and repair all types and sizes of commercial and industrial HVAC equipment from 2 ton split systems to 1,000+ ton centrifugal chillers including roof top units, chillers, cooling towers, pumps, air handlers, heat exchangers, controls, automated energy management systems, compressors and piping.

We offer our clients the option of “as needed” service or customized maintenance and service plans that improve system reliability, increase service life and provide peace of mind.  We understand that every client has different needs.  Whether you want to control costs with a comprehensive full coverage maintenance and service plan or prefer the flexibility of a maintenance only plan, we create an individualized maintenance and service plan to meet the unique needs of your facility. 

Turnkey equipment retrofits are a JS Thomas Service specialty.  Let us put the expertise earned through more than 35 years of commercial HVAC experience to work for you.  We will handle the entire project from start to completion including arranging and scheduling electricians and other tradesmen to quickly and efficiently complete the retrofit with minimal system downtime. 

Our personal customer service means you will speak to a real person who can help solve your HVAC issues every time you call.  Contact our Atlanta Full Service Commercial & Industrial HVAC Contractors  today. We are available to meet the commercial HVAC needs of our clients 24 hours a day, 365 days a year.

Services Overview


JS Thomas Mechanical, LLC


We believe our market advantage is an unmatched level of personal service. Live people answer our phones 24/7. Hang up and know that we are off and running to solve your HVAC issue – no phone trees, no voice mail, no doubts!
Jim F. Thomas – President
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