Construction: S235JR EN10025 quality steel sheets. Fixed spiral heat exchangers with S235JR EN10025 steel tubes welded to the tank. Flange for inspection and cleaning or for integration (on DHW tank).
Flywheel - producer without fixed heat exchanger, preparer - storage tank for DHW in AISI 316L stainless steel.
Treatment: pickling and passivation after welding.
Insulation: Non-removable rigid polyurethane for model 500 and 700 and flexible polyurethane for the remaining models/polyester fibre panel, environmentally friendly and recyclable with Euroclass B s2d0 fire resistance according to UNI ENI 13501-1 with insulating power.