Water softener Viessmann AQUAHOME 20 SMART 2.0 m3/h station (model 7938279)

The Viessmann AQUAHOME 20 SMART is a compact water softening station with a nominal capacity of 2.0 m3/h designed for residential and light commercial applications. The unit reduces water hardness by ion-exchange softening to protect boilers, hot water heaters, kettles and other water-using appliances from scale buildup. The station integrates into household plumbing and includes a smart control system to manage regeneration cycles and optimize salt and water consumption.

Advantages

The AQUAHOME 20 SMART delivers consistent reduction of hardness ions through a controlled ion-exchange process, helping to extend the service life and efficiency of heating systems and domestic appliances. Its smart control optimizes regeneration timing based on usage patterns, which reduces unnecessary salt and water use. The compact design and standard plumbing connections make installation straightforward in utility rooms, basements or plant rooms.

Suitable for

• Private homes and apartments requiring scale prevention
• Small commercial installations such as guesthouses or offices
• Protection of boilers, heat exchangers and hot water systems
• Improving detergent performance for laundry and dishwashing

Key specifications

• Nominal flow capacity: 2.0 m³/h
• Operation principle: ion-exchange softening
• Control: smart regeneration management with usage-based scheduling
• Typical installation: inline station for domestic and light commercial plumbing
• Primary function: hardness reduction to prevent scale formation

How to use

Install the AQUAHOME 20 SMART in the main cold water supply line according to local plumbing codes and manufacturer installation guidelines. Connect brine and drain lines as required and commission the control unit by entering site-specific parameters such as inlet hardness, average daily consumption and regeneration preference. Regularly check salt level in the brine tank and refill with appropriate water-softening salt when indicated by the control or visible salt level. Periodic inspection of valves and connections is recommended to ensure leak-free operation.

Usage recommendations

For reliable performance, use high-quality pellet or granular sodium chloride formulated for water softeners, follow local regulations for brine discharge, and schedule annual visual inspections. When integrating with heating systems or water heaters, verify compatibility with system manufacturers’ maintenance recommendations.