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TOTO launches WASHLET S2 and S5 electronic bidet seats with next-generation direct water heating technology

December 29, 2025

December 2025, TOTO Vietnam officially introduced two lines of WASHLET S2 and WASHLET S5 electronic bidet seats, featuring comprehensive design and technology upgrades, notably a direct water heating system using a spiral heat exchange structure. This solution provides instant, consistent, and energy-efficient warm water, meeting the needs of modern households.

The launch of WASHLET S2 and S5 continues to demonstrate TOTO's commitment to enhancing hygiene, comfort, and safety standards in the bathroom.

Designed for the practical needs of Vietnamese families

As young families increasingly focus on quality of life, sanitary fixtures must not only ensure basic functionality but also be safe, easy to use, and cost-efficient to operate. WASHLET S2 and S5 were developed based on these criteria, making them suitable for users of all ages, from young children to the elderly.

The products are designed to provide a clean and convenient daily hygiene experience while reducing electricity costs and the effort required for cleaning and maintenance.

Minimalist, compact, and easy-to-clean design

Compared to previous generations, WASHLET S2 and S5 feature significantly refined designs:

Slimmer, more seamless, and more compact styling
Reduced gaps to minimize dust and bacteria buildup
Soft, harmonious curves that blend seamlessly with the toilet
Ergonomic design for enhanced user comfort

The optimized functional module reduces the overall size by approximately 19%, making it ideal for modern bathroom designs, especially in urban apartments with limited space.

Key differences between the two product lines

WASHLET S2 (TCF33461GAA): features a side-mounted control panel with a compact size and intuitive button layout.
WASHLET S5 (TCF34461GAA): features a separate control panel with a minimalist design that is easy to remember and operate.

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Spiral direct water heating technology: Instant, continuous warm water

WASHLET S2 and S5 are equipped with next-generation direct water heating technology using a spiral heat exchanger. This mechanism optimizes the heat transfer area, allowing the water to reach the set temperature almost instantly, even when the inlet water temperature is low.

Compared to traditional bidet seats with water tanks, the direct heating system:

Provides a continuous supply of warm water without running out
Maintains a consistent temperature for multiple consecutive users
Is ideal for early morning or cold-weather use

By eliminating the need to maintain a hot water tank and combining it with high heat transfer efficiency, the product reduces annual electricity consumption by up to 38% while helping to extend component lifespan.

Equipped with TOTO's core hygiene technologies

Both the WASHLET S2 and S5 lines incorporate standard features highly valued by users:

Multi-mode nozzle for pre- and post-washing
EWATER+: electrolyzed water disinfects the nozzle after each use
PREMIST: sprays a fine mist to moisten the toilet seat and reduce dirt buildup
Heated, deodorized, and dried seat

When combined with a TOTO toilet, the product delivers the full benefits of signature hygiene technologies such as CEFIONTECT glaze, RIMLESS design, and TORNADO flushing, making cleaning easier and more effective.

A sustainable hygiene solution for modern living spaces

WASHLET S2 and S5 are designed as long-term hygiene solutions that balance comfort, performance, and energy efficiency. Reduced electricity consumption, minimized dirt buildup, and enhanced operational durability not only provide economic benefits but also align with today's sustainable consumption trends.

With the launch of these two product lines, TOTO reaffirms its commitment to developing safe, modern, and user-friendly hygiene solutions that help improve the quality of life in every home.