PAT commenced its ever-progressing journey with the expertise of Design and manufacturing of process plant equipment in Year 1973 as a private limited company with a range of Air Conditioning, Refrigeration as well as Heat & Mass transfer equipment. The growth saga was further strengthened in 1993, when company has started a new manufacturing unit at Rakanpur, Gujarat spread over 33,400 Sq. Meter of Land. It became a Public Limited entity (Shares' Listing on BSE) and thus was born, Patels Airtemp (India) Limited. In the year 2019 PAT headed towards addition of another unit for dedicated manufacturing of Air Cooled Heat Exchanger / Air Fin cooler in total land area of 44,500 Sq. Mtr. New unit will be completely operational by Mid-2020. This unit will be able to manufacture 450 Nos. tube bundles and dispatch 150 Nos. modular constructed Air Fin Cooler, annually. The present portfolio of product range which comprise of Shell & Tube Heat Exchanger, Air Fin Cooler, Pressure Vessel, Shell & Fin Tube Heat Exchanger make PAT a single stop solution for multiple heat and mass transfer application. Along with development of product design and product manufacturing application, PAT in its tenure of 45+ years continuously upgraded quality and product system by acquiring world's most recognized system like ISO 9001-2015, ASME (N - NPT, U2, U, S-Stamps). PAT is one of the very few organizations in world and one of only 3 organizations in India to acquire ASME N Stamp for manufacturing of stringent nuclear application. While maintaining and upgrading the product capability and ability to design and manufacture as per latest codes, PAT acclaim to have few most critical application of compressor coolers and many other applications utilizing Fin Tube technology. Apart from plain tube heat exchanger, PAT has developed hands-on expertise to design and manufacturing Fined heat exchanger using various fins like Plate Fin, Extruded Fin, Crimped fins, Embedded Fin, Tension Wound fin etc.