Coala air heating coils are intended for heating fresh or recycled air circulating in industrial processes or in the air conditioning of buildings, up to 500 kW, 750 V tri, > 300 °C.

Coala heating coils of rectangular or circular section can be mounted between flanges on an air duct or inserted in a drawer in a duct or box.

They are equipped with heating resistors formed as bare or winged hairpins mounted in a protected steel or stainless steel box or on a support plate. A safety device (thermostat, Pt100 probe or thermocouple) provides temperature limitation.