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About Us - The Original Innovators The Original Innovators supports our history as the first to bring the fire tube heat exchanger to the residential market. Home About The Original Innovators Triangle Tube, an innovator and industry leader in the manufacture and supply of quality stainless steel hot water heating equipment, has been keeping families warm since 1946. Our strapline – The original innovators supports our history as the first to bring the fire tube heat exchanger to the residential market. Learn more about our story, our work, and stay up to date with Triangle Tube's news!