Original oil and gas trade magazine vintage ad for HUDSON ENGINEERING CORPORATION. Main office was located at Fairview Station, Houston, TX. Hy-Fin Double Tube hot fluid to air exchanger, employed in Solo-Aire and Combin-Aire units. For users of fan blown air for cooling. Another in the long list of improvements that have resulted from the constant effort to maintain and advance the quality and utility of Hudson equipment. This unique 1953 old two-sided petroleum refinery magazine advertisement would display beautifully matted and framed.