The MAXI 1 range consists of domestic hot water boilers, equipped with single, fixed and double coil coils with a large surface area, particularly suitable for use with heat pumps, available in different capacities, from 300 to 1000 litres. They are equipped with different types of insulation according to capacity (see Insulation table), PVC outer jacket, magnesium anode for protection against galvanic currents, and an inspection flange for easy access during inspection and maintenance.