Tesy V100099P4 – Buffer Tank (1000 L)

High-capacity thermal storage for advanced and large-scale heating systems

The Tesy V100099P4 is a high-performance 1000-liter buffer tank designed for demanding residential and commercial heating applications. With its durable construction, extra-thick insulation and versatile connection layout, this tank is ideal for heat pumps, boilers, biomass systems and hybrid configurations that require reliable heat storage and system stability.

Why choose a 1000-liter buffer tank?

Larger heating systems rely on significant thermal storage to maintain stable temperatures and efficient operation. A buffer tank of this size offers:

• greatly reduced start/stop frequency for heat pumps and boilers,
• smoother flow temperature control across the entire heating network,
• extended component lifespan due to reduced thermal stress,
• hydraulic separation for multi-zone or multi-source systems.

Whether integrated into a large residential system or light commercial property, the V100099P4 ensures consistent, balanced performance even under fluctuating load conditions.

High-efficiency 100 mm EPS insulation

The tank is wrapped in 100 mm removable EPS insulation, providing excellent thermal protection. Its low heat loss of 136 W (ΔT 45K) ensures stored energy is preserved for extended periods, reducing the workload of the heat source and lowering overall energy consumption. This insulation level makes the tank suitable for both high- and low-temperature systems.

Four sensor pockets for advanced control integration

The four integrated sensor pockets allow for precise monitoring and intelligent system management. Installers can strategically place flow sensors, return sensors, heat pump controllers or zone management sensors to optimize performance. Accurate temperature sensing is critical in systems with multiple heating zones, mixing valves or hybrid technologies.

Flexible hydraulic configuration

The V100099P4 includes multiple connection ports (L1–L4) and a vent port for system safety. Its structured layout supports a wide range of hydraulic setups, including:

• heat pump primary loops,
• secondary heating circuits for radiators or underfloor heating,
• solar thermal integration,
• boiler circuits in hybrid configurations.

The tank’s 990 mm diameter and 2125 mm height make it suitable for spacious technical rooms typical of larger buildings or professional installations.

Ideal for residential and commercial installations

This 1000-liter buffer tank is particularly well-suited for:

• large homes and multi-family buildings,
• commercial buildings such as offices, hotels or sports facilities,
• heat pump systems with capacities of 15–30 kW or more,
• complex systems with several circulation pumps, mixing valves or zones,
• hybrid systems combining renewable and conventional heat sources.

Its high thermal mass stabilizes the system during peak demand and ensures uniform temperature distribution across extensive heating circuits.

Installer advantages

Installers benefit from:

• a clear and robust connection layout,
• ample sensor pockets for flexible control strategies,
• addressing hydraulic issues in multi-source systems,
• a strong, low-maintenance tank design.

When combined with heatpumps, buffer tanks or connection materials, the V100099P4 becomes a core component of a high-performance heating network.

Expert support from Hewa

Hewa helps installers with hydraulic layout planning, system dimensioning and component selection. If you need technical guidance or want to configure a complete heating solution, reach out for specialist support and tailored recommendations.