Celebrating 40 Years of Excellence in Infrared Engineering

PROTHERM LLC is a privately held, American manufacturing company that specializes in making electric infrared heaters, infrared ovens and equipment for a worldwide customer base of end users, integrators, resellers, and OEM accounts.

We are a team of people you can trust, who take pride in making quality infrared products that simply work and last.

For nearly 40 years this has been our identity and what we continue to strive for every day. With innovative designs, unique heating elements, and high efficiency standards, PROTHERM LLC has become a leading manufacturer of electric infrared heaters, infrared ovens and equipment.  All our electric infrared heaters and ovens are customized for each application, made to order from stock materials, and are completely manufactured by PROTHERM LLC, to assure you of the best prices, highest quality, and fast service.

A PROTHERM heating solution goes beyond our products.  Our knowledgeable Sales staff will listen to your goals, teach how infrared can benefit your process, and help you select equipment that is right for your specific application.  Our Engineers offer creative, user-friendly and conservative designs.  And our skilled Fabrication specialists use high quality materials with true craftmanship.  All this results in electric infrared heaters, infrared ovens and equipment that is simple to install, easy to operate, virtually maintenance free, and exceptionally long lasting, in addition to reducing energy costs, and improving your product quality.


Process Thermal Dynamics Inc, tradename PROTHERM, was started in 1985 in St Paul MN.  The small business was focused on being a high quality, reputable, reasonably priced, infrared heater supplier.  In 1991 the company relocated to Alexandria MN and added in-house design and manufacturing of custom controls, frameworks, and complete oven systems.  With steady growth, a new facility with office and manufacturing plant was built in 1996 at the current Brandon MN location.

In 2016, the company was purchased, and the name officially changed to PROTHERM LLC.  Having common ownership with Trimac Industrial Systems brings additional experience and a larger presence in the finishing industry.  We are now able to better serve our customers’ needs by expanding our access to washers and cleaning equipment, convection ovens, installation services, and gas catalytic infrared heaters and ovens.

Throughout the years there has been a lot of evolution and improvements, but some things haven’t changed.  We are still known as a high quality, reputable, reasonably priced, infrared heater supplier.