GDD series Water-to-water heat pump for indoor installation image

WI series.

Water-to-water heat pump for indoor installation.


Energy from groundwater.

An unlimited resource.

Water-to-water heat pumps use ground water as a heat source all year round. The only requirement: the ground water taken from the well must be available in a sufficient quality and quantity. It is also important to check in advance whether an approval from the responsible water authority is in place.


GDD Energy from groundwater icon

You can’t get more efficient than that.

Wherever a maximum efficiency system for cooling and heating is required, our water-to-water heat pumps are the perfect solution. Since even on coldest days the ground water temperature is constant at around 10°C, heat generation does not have to compensate for climatic fluctuations. This means it is always cosy and warm in winter – and extremely energy-saving passive cooling is always possible in summer.

GDD Wärmepumpe WI Grundwasser Bild
GDD innovative spiral heat exchanger heat pump image

The quality: robust.

Simply can’t be beaten: An innovative spiral heat exchanger made from corrosion-free stainless steel makes our WI heat pumps extremely robust. This means that they can be used practically independently from the water quality.

Green energy.

The heat pumps from the WI-series save lots of electricity and have therefore more than earned the A++ energy label.

the most efficient heat pump wi Glen Dimplex Deutschland image energy efficiency table
Die SRH Smart Room Heating App für die Wärmepumpen WI von Glen Dimplex Deutschland Bild

Everything in perfect control.

Integrated and controlled. The perfect comfort temperature – controlled easily via your smartphone or tablet. Thanks to the Smart Room Heating App. Now you can use your heat pump energy efficiently, integrated and controlled at all times.


> To the App Store.

WI TU: The most efficient.

High-efficiency water-to-water heat pumps for heat outputs of 10kW to 22kW. This corresponds to heated living spaces of between 200m2 and 500m2. One- to two-family homes or small apartment blocks can thus be heated and cooled without problems. But there are also options for larger apartment buildings. The WI TU from Glen Dimplex can also be flexibly expanded. For example in combination with oil and gas heating systems (bivalent fossil) or piece wood burners and solar thermal systems (bivalent renewable).

To the products:

> WI 10TU

> WI 14TU

> WI 18TU

> WI 22TU

GDD heat pump WI TU the most efficient water to water heat pump image

Which heat pump do I need?

We will gladly assist you. Our experts are on hand to help.

All heat pumps at a glance.

The wonder of the heat pump – Simply use more environmental energy. No other heating system works as efficiently, economically and environmentally-friendly.