Finned coil air heaters Related products Related industries Related services Alfa Laval supplies finned coil air heat exchangers designed for air heating. For this application a hot liquid (usually water) is pumped through the tubes, heating up the coil and the air flowing through. Alfa Laval supplies both standardized as well as fully customized air heaters. These products are used for heating spaces such as workshops, sports halls, or as hot air door curtains in shop entrances. Request information