Hydrotherm 80 recuperator. Heat recuperator with riser door, which can be positioned at a 45 ° angle or against a wall. The height of the door provides an excellent view of the flames in their entirety. Can be integrated with heat exchange kit. This hydro extractor allows heating a total volume of 638 m 3 through an average yield of 77.1%. Water volume: 47.7 liters.