In business for more than 23 years, Pre Heat Inc. is a company that specializes in custom industrial air-to-air heat exchangers and packaged heat recovery systems. Based in Oostburg, Wis., it provides primary exchangers on catalytic oxidizers and thermal fume incinerators; secondary exchangers on catalytic, thermal and regenerative oxidizers secondary make-up air package recovery units to preheat air back to ovens, dryers and building. Pre Heat Inc. also replaces any manufacturers old and leaking heat exchangers. The company offers plate type heat exchangers, shell and tube units, indirect fired heaters, precoolers and concentrators.