About Thermal Tech

Thermal Tech, Inc. is a Leader in Boiler Service, Sales, Parts, Support Equipment, and Rentals since 1984 in Central Florida.

With headquarters in Orlando and a branch location in Tampa, we are ready to assist with all your boiler system needs, from helping you choose the right system components, to prompt and professional maintenance and repair.  Our Commitment to the industry is:
“To deliver solutions that provide total system efficiency and reliability.”

The team of Thermal Tech is 40 employees strong and led by Deron Keiter,  Rick Wilkins, and Hugh Wilson. Our staff includes qualified professional engineers, factory trained service technicians, and experienced replacement parts specialists. We are dedicated to providing timely, professional and ethical response to customer needs. Representing the leading manufacturers in the industry, coupled with years of experience assures our customers we will provide sound advice and reliable service.


The Thermal Tech, Inc. team and culture has evolved through our rich history and can be defined by our Core Values:Core Values

  1. Customer Driven and Focused
  2. Respect for People & Policy
  3. Do the Right Thing

These ideals have been 32 years in the making and Thermal Tech, Inc. has attracted people with the same values.  They cannot be taught, they are what make each and every one of us who we are.  These phrases are at the core of every team member.  They ARE our Core Values.

See our President’s Core Value Speech for additional insight.


Thermal Tech, Inc. Core Focus is defined by our purpose and our niche:


Helping the Customer Remove the Worry

Our Niche:

Single Source Provider


  • System Knowledge
  • Product
  • Commissioning
  • Service

Marketing Strategy

Target Market:  

Our Target Market is Medium to Large Commercial & Industrial Customers located in Central Florida, who value consistent service, reliable and innovative system solutions.

Three Uniques:

  1. Our PeopleTTI Process R03-16
  2. Systems Knowledge
  3. Innovative Solutions

Steps To Our Proven Process:

Needs Assessment – Recommendation- Proposal Presentation – Award/Submittal Approval – Installation – Commissioning – Partner for Life


Fletch CB Intro 1945
Introducing O.H. “Fletch” Fletchall

Mr. O.H. “Fletch” Fletchall was a steel designer working with Aetna Steel Company of Jacksonville designing heating systems for fuel transport barges during the Second World War and had to routinely visit Mr. Dick Illingworth to gather structural information on boilers.

He and Mr. Illingworth developed a close friendship and in April 1945, Mr. Illingworth offered Fletch a position with Illingworth Engineering, Inc., one of the first generation of Cleaver-Brooks representatives. Mr. Illingworth passed away and Fletch continued operations of the company.

Don Fletchall & Chester Fulkerson, Jacksonville April 1971

His sons, Jerry and Don Fletchall, joined their father in the business as Sales Engineers, in 1958 and 1961 respectively. Illingworth’s region at that time covered South Georgia, North and Central Florida.

Hugh Wilson at Viera Hospital, October 2010

Hugh Wilson, a childhood friend of the Fletchall’s, joined the team in 1971 and opened an office in Winter Park operating under the same name, Illingworth Engineering, Inc. On January 1, 1984, Don split from Illingworth and partnered with Hugh Wilson to incorporate Thermal Tech, Inc. with the corporate office located in Tampa and an office in Winter Park. The company grew from a couple of two man offices to approximately 15 employees in the mid 1990’s.

In 1986, Deron Keiter was recruited by Mr. Wilson as a Service Technician and relocated to central Florida. Deron advanced to Aftermarket Sales in 1991. Rick Wilkins joined the sales team in Tampa 1994 after 10 years’ experience with Fluor Engineers in South Carolina.

Don Fletchall Portrait
Co-Founder/President Don Fletchall

In February 1997, after leading Thermal Tech, Inc., Don Fletchall retired and corporate headquarters transferred to Hugh Wilson in the Orlando office. At this time Deron and Rick were given opportunity to become partners in the corporation and joined the management team.

Orlando SentinelIn 2002, Mr. Wilson began planning the succession of the company and formed an ESOP to reward the employees with ownership in the company. The resulting ownership is with the Thermal Tech, Inc. ESOP Trust, Mr. Keiter, and Mr. Wilkins.


Hugh Wilson, Rick Wilkins, Deron Keiter


What We Do

Thermal Tech Inc. has evolved from providing just sales and service for steam boilers and steam specialties, to being your complete solutions expert for hydronics and steam boiler room systems. We provide reliable, cost effective, energy efficient solutions using the latest proven technology available through our world class partner manufacturers.

Markets We Serve

Hospitals, Schools & Universities, Industrial & Manufacturing, Hotels & Resorts, Corrections, Agriculture, Commercial Laundry, Entertainment/Theme Parks, Food & Beverage, Pharmaceutical, Government, Municipal Digester Waste Water, and Export.

Areas We Serve

Central Florida including:  Brevard, Charlotte, Citrus, DeSoto, Hardee, Hernando, Hillsborough, Lake, Manatee, Marion, Orange, Osceola, Pasco, Pinellas, Polk, Sarasota, Seminole, Sumter, and Volusia counties.


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Clients We Serve