T & DESIGN

Heat exchangers not being parts of machines, comprising convectors and convection sections, fuel economizers, extended surface heat exchanger coils, hold-over truck plates, solar absorbent panels, and vapor-to-liquid or liquid-to-liquid heat transfer units

Repair, maintenance and replacement of heat exchangers and heat exchanger parts

Design, testing and quality control inspection of new products of others, namely, heat exchangers and heat exchanger parts