Founded in 1885, Harris Thermal Transfer Products is an ASME-certified industrial fabricator serving clients worldwide — designing, manufacturing, and repairing custom thermal process equipment.
For more than 140 years, Harris Thermal has proudly manufactured equipment in the United States. Originally founded as Harris Ice Machine Works, the company built ammonia-refrigeration equipment before transitioning during the world war era into custom thermal process equipment — first supporting the United States' war efforts, then the rapid expansion of American manufacturing.
That spirit of innovation carries forward today. We build some of the largest custom vessels in the industry — over 500,000 pounds — and ship equipment to clients around the globe. This heritage proves our ability to adapt, endure, and deliver value for generations of customers.
We specialize in Shell & Tube Heat Exchangers and ASME Code Pressure Vessels — plus custom engineered equipment for unique applications.
Our 50,000+ sq ft facility and integrated in-house approach deliver short lead times, competitive pricing, and best-in-class quality on projects of all sizes and shapes.
We work closely with each client to meet application requirements, specifications, budget, and timeline.
Decades of knowledge and advanced practices produce cost-effective equipment that runs for many years in the most difficult conditions.
On-time delivery and proven service that makes us our customers' most trusted fabrication partner.
Our vision is to remain the most trusted fabricator for industries worldwide — known not only for technical capability, but for quality, expertise, and the long-term relationships we build.
Every person is integral to our success and we look out for each other.
We are honest, transparent, and trustworthy.
Good isn't the finish line — we strive to be the best.
When the going gets tough, we get it done, no matter what.
We empower people, value opinions, and win as a team.
We celebrate wins, keep a sense of humor, and create a workplace people enjoy.
Our ASME “U,” “R,” and “PP” stamps, international certifications, and rigorous in-house testing ensure every product is built for safety, compliance, and long-term reliability. Learn more about our certifications & standards, or visit our FAQ page for detailed insights.
We'll support your project from concept through completion — reliable, code-compliant solutions built to last.