Water-air heater for ventilation systems. Water connection made of copper pipe with external thread. Installation instructions: Install behind the fan at a distance of at least 1 m to ensure even air flow. With ventilation and drainage. Ensure accessibility during installation. Provide frost protection on site. With offset manifolds, floating to absorb thermal expansion. Article: WHP 50-55, Max. flow speed: 3.5 m/s, Installation location: Duct, Installation position: vertical / horizontal, Housing material: galvanized sheet steel, Weight: 11.86 kg, Weight with packaging: 13.55 kg, Duct dimensions: 800 mm x 500 mm, Width: 1006 mm, Height: 570 mm, Depth: 120 mm, Width with packaging: 1245 mm, Height with packaging: 605 mm, Depth with packaging: 155 mm, Air heater type: Water, Heating output: 55000 W, Mass flow: 2969 kg/h, Flow temperature: 70 °C, Return temperature: 50 °C, Max. water temperature: 100 °C, Max. water pressure: 8 bar, Water pressure difference: 8000 Pa