Profile: Marlo Coil is ISO 9001 registered company. We supply heating tranfer coils, air handling units, air conditioning systems and refrigrant systems. Marine grade coil features continuous plate fins and a staggered tube arrangement to provide engineering balance between heat transfer, air flow resistance, strength and maintenance. AHU tongue & groove is available with factory witness testing of airflow, vibration, sound power, cabinet leakage and panel deflection.