Profile: Scan Marine Equipment Inc specializes in boat heating & refrigeration systems. We focus on both heating and cooling (refrigeration units) for many boat applications. The Wallas 1300 is a small compact cabin heater. The blower unit consists of a laminated heat exchanger and a three speed fan built into a stainless enclosure that is connected to the main engine cooling system to provide heat when the engine is running. Coolmatic VD-16 is a circulating air evaporator cooling unit for deep freezing.