Tesy V10/9S2100099HYG5.5HE - Hygienic Cylinder with Dual Heat Exchangers (1000L)

High-capacity hygienic cylinder for modern and hybrid heating systems

The Tesy V10/9S2100099HYG5.5HE is a premium 1000-liter hygienic buffer cylinder designed for systems that require both high-volume heating storage and continuous, legionella-safe domestic hot water production. With its stainless-steel DHW coil and two integrated heat exchangers, this model is ideal for advanced heat pump installations, solar thermal systems and hybrid configurations where performance, flexibility and hygiene are essential.

Hygienic DHW production with stainless-steel coil

As a hygienic cylinder, this unit does not store potable hot water inside the tank. Instead, cold mains water flows through the internal AISI 316L stainless-steel coil, where it is instantly heated by the surrounding buffer volume. This design offers several important advantages:

• Legionella-safe DHW thanks to no stored domestic hot water,
• high flow rates due to the generous coil volume,
• reduced scaling and long service life from corrosion-resistant materials,
• consistent hot water availability even during peak demand.

This makes the cylinder particularly suitable for larger homes, multi-bathroom properties, hospitality, leisure facilities or any installation requiring safe and continuous hot water production.

Dual heat exchangers for multi-source integration

The unit features two separate heat exchangers of different capacities, enabling efficient integration of multiple heat sources. Typical configurations include:

• heat pump on the primary exchanger,
• solar thermal collectors on the secondary exchanger,
• a boiler (gas, biomass or oil) for peak load support.

This flexibility allows installers to create hybrid systems that maximize renewable energy while maintaining reliable heating performance even in challenging conditions.

Exceptional heat storage capacity

With an effective working volume of 1000 liters, the cylinder provides a substantial heat buffer that stabilizes system performance and enhances energy efficiency. The large stainless-steel coil transfers heat rapidly from the buffer water to the DHW flow, ensuring stable temperatures even with simultaneous draw-off at several outlets.

High-performance insulation for reduced energy loss

The cylinder is equipped with a robust 100 mm EPS insulation layer, delivering excellent heat retention and minimizing standby losses. This is especially beneficial when paired with heat pumps, as stored heat is preserved over longer periods, reducing compressor cycling and improving overall system efficiency.

Installer-friendly construction

The Tesy hygienic cylinder series is designed with practical installation in mind. Key features include:

• four large hydraulic ports for flexible system layout,
• four sensor pockets for precise monitoring and control,
• a durable and accessible construction for easy servicing,
• a stable footprint and structurally reinforced design,
• compatibility with a wide range of heating technologies.

This makes the cylinder easy to integrate into both new installations and retrofit projects, especially where multiple energy sources are combined.

Ideal for hybrid and renewable-based heating systems

The V10/9S2100099HYG5.5HE excels in systems where renewable technology plays a leading role. Common applications include:

• heat pump + solar thermal combinations,
• systems requiring high DHW loads,
• properties with several bathrooms and high-flow fixtures,
• commercial environments such as gyms, restaurants or guesthouses.

The unit also supports efficient boiler integration, making it well-suited for hybrid setups that combine renewable and traditional heat sources for maximum flexibility and comfort.

A durable and future-proof solution

With its corrosion-resistant stainless-steel coil, strong insulation and high-performance heat exchangers, this cylinder is engineered for long-term reliability. Its large buffer capacity and hygienic DHW system make it a future-proof solution for high-demand installations where performance cannot be compromised.

Professional support from Hewa

Hewa assists installers with system design, technical selection, hydraulic schematics and project-specific configuration. For tailored advice, product availability or system integration support, please contact us.