Indirectly fired Fast boiler and buffer tank in 1 (housing) CDWT-250L Duplex 2205 Boiler tank 190 liters, Buffer tank 60 liters, with coil (spiral) Heat pump boiler

CDWT-250L – Fast Boiler Tank & Buffer Tank in one housing – 250 Liter (190L + 60L), Duplex 2205 Stainless Steel, with Spiral for Heat Pump

The Coolmark CDWT-250L Fast Boiler & Buffer Tank Combination offers a powerful, compact and energy-efficient solution for modern heat pump systems. This unit combines a 190 litre boiler tank and a 60 litre buffer tank in one robust Duplex 2205 stainless steel housing. Ideal for installations where space is limited but performance cannot be compromised.

Both tank sections are manufactured from Duplex 2205 stainless steel , which guarantees excellent corrosion protection, long life and reliability under pressure. This 2-in-1 unit is perfect for both residential and light commercial applications.

The integrated spiral heat exchanger (coil) has a surface area of ​​1.7 m² and is optimised for use with low-temperature sources, such as air-to-water heat pumps. This ensures that domestic hot water is heated quickly and efficiently, even at low supply temperatures.

The unit is equipped with 50 mm high-density PUR rigid foam insulation all around. This minimizes heat loss and contributes to a sustainable and energy-efficient heating system. Thanks to its compact dimensions and smart connection options, this boiler is easy to install in smaller technical rooms.

Key benefits:

• 2-in-1 system: 190L boiler tank + 60L buffer tank in one housing

• Made of Duplex 2205 stainless steel: corrosion-resistant, pressure-resistant and suitable for drinking water

• Spiral heat exchanger (1.7 m²): fast heat transfer, optimized for heat pumps

• 50 mm PUR insulation: excellent thermal protection, low downtime losses

• Compact & efficient design: ideal for homes or technical rooms with limited space

• Multiple connection options: flexible integration into existing and new systems

Technical specifications (summary):

• Total volume: 250 liters

• Boiler tank: 190 liters

• Buffer tank: 60 liters

• Material: Duplex 2205 stainless steel

• Insulation: 50 mm PUR hard foam

• Spiral surface: 1.7 m²

• Heat exchanger capacity at 80/10/45 °C: approx. 18.7 kW

• Max. working pressure (tank): 10 bar

• Max. working pressure (coil): 16 bar

• Max. temperature: 95 °C

• Dimensions (h x Ø): 1350 x 650 mm

• Connections: G 1¼", G 1", sensor inputs

Applications:

• Air/water and ground/water heat pumps

• Solar boiler systems and hybrid installations

• Residential construction, apartments, commercial construction

• Renovations, compact technical rooms

• Small business and agricultural applications

The CDWT-250L is the choice for those looking for a sustainable, compact and powerful boiler solution for heat pump systems. With high-quality materials, efficient heat transfer and smart construction, this unit is prepared for the energy requirements of tomorrow.