720l indirect water heater SGW(S) BIG TOWER with spiral coil, enameled, 70mm rigid polyurethane foam, skay, vertical freestanding 26-704000N

DHW heat exchanger for efficient water heating

This vertical, freestanding DHW heat exchanger from the SGW(S) Big Tower series is a robust solution for preparing domestic hot water in homes and commercial buildings. The 700-liter tank, equipped with a spiral coil, provides a large heat exchange surface and efficient cooperation with various heat sources – primarily central heating boilers. The design also allows for the installation of an additional heat source in the form of an electric kit, which increases the flexibility of use.

Construction and application

The heat exchanger is made of steel and coated with ceramic enamel fired at a high temperature (850°C), which guarantees durability and corrosion resistance. Insulation made of rigid polyurethane foam with a thickness of 70 mm minimizes heat loss, reducing operating costs. The casing made of skay provides an aesthetic appearance and additional protection against mechanical damage. The spiral coil with a large surface area allows for quick and efficient water heating, regardless of the boiler's power.

• Large capacity (700 l): Provides enough hot water for larger families or intensive use.
• Spiral coil: Offers a large heat exchange surface, which translates to fast water heating and high efficiency.
• Enameled tank: Protects against corrosion and extends the life of the device.
• Efficient insulation: Reduces heat loss and lowers water heating costs.
• Possibility of installing an electric heater: Allows independent water heating or supporting the central heating boiler.
• Vertical construction: Saves space and simplifies installation.

Energy class and parameters

Energy efficiency class C indicates a moderate level of energy saving, but thanks to good thermal insulation, the heat exchanger maintains water temperature for a long time, minimizing energy losses. It is worth paying attention to the power of the heat exchanger (technical data available in the table), which should be matched to the power of the central heating boiler to ensure optimal performance of the heating system. The use of a magnesium anode (standard equipment) further protects the tank against corrosion, and an optional titanium anode offers even longer anti-corrosion protection.