Painted steel frame fitted on two polyethylene tanks for the chemical and for the fuel, highly resistant. Anti-shock plastic cover. Chemical tank Lt. 7. Fuel tank Lt. 24. Automatic Bypass valve. Safety valve. Thermostat for temperature adjustment. Stainless steel vertical boiler. Ventilation by an independent electric motor. Temporized Total Stop (TTS) with microleakages control. 24V low tension electrical controls.