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SI Series

Brine/Water Heat Pumps for Indoor Installation

Energy? Comes from the Earth

It's green above. The heat pump works underneath.

Brine/water heat pumps use the ground as an inexhaustible heat reservoir. The stored heat is absorbed via probes up to 100 meters deep and converted into pure energy. Even if it's icy upstairs: the constant temperature of 10°C in the ground makes efficient use possible, as the flow temperature remains constant even in winter. If the property is large enough, energy can also be “harvested” via collectors.



Use Environmental Energy Twice

The indoor brine/water heat pumps impress with their maximum performance figures and low operating costs. They not only heat and generate hot water - they are also ideal for passive cooling in summer. Ideal for one-/two-family or multi-family homes.

Probe? Or Collectors?

Brine/water heat pumps use geothermal heat, which is transferred via a heat exchanger to a mixture of antifreeze and water, the so-called brine. Various systems serve as heat sources.

Ground collectors are laid horizontally and must not be built over. A garden area that is at least 2 to 3 times the heated living space is required in which the pipes are laid at a depth of approx. 1.2m.

If there is not enough space available or if additional cooling is required, drilling earth probes goes deeper.

Standard or Individual?

Thanks to the variety of devices, the right system can always be put together for the respective application. In addition to the basic function of heating, these products can be used for passive cooling or hot water. Even heating a swimming pool is possible. Always maximally efficient.

Save Green

The heat pumps in the SI series have been awarded the A++ energy label – the top grade for energy efficiency.

From everywhere. At any time

Convenient Controls

With the Dimplex Home app, the heat pump control can be accessed at any time and from anywhere.

The intuitively designed app interface makes it easy to make the most important settings on the heat pump, such as summer/winter switching or setting the hot water temperature. In combination with the intelligent room temperature control, the temperature for up to 20 rooms can also be set depending on the user via the app and even combined with weekly programs.


SI TU. High efficiency heating heat pump.

Suitable for new construction and the renovation of existing buildings – from 100m2 to 500m2 of heated living space. High performance figures thanks to a sophisticated cooling circuit and COP booster. Universal design with flexible expansion options.

To the products:
> SI 6TU
> SI 8TU
> SI 11TU
> SI 14TU
> SI 18TU
> SI 22TU

SIK TES. Heating heat pump in compact design.

Suitable for new construction and the renovation of existing buildings – from 100m2 to 300m2 of heated living space. Compact design with integrated components. Can be expanded with an optional 200 liter hot water tank.

To the products:


SIW TES. Heating heat pump in compact design. Integrated hot water tank.

With the integrated 170 liter hot water tank ideal for households of up to four people and underfloor heating for 100m² up to 250m² of space. Whisper-quiet operation. Optional: passive cooling.

To the products:


SIH TE. High-temperature heating heat pump in universal design.

Heat pump (brine/water) for indoor installation with two performance levels. If required, flow temperatures up to 70°C, e.g. B. for operation with radiators or for hot water preparation above 60°C. Universal design with optional hot water preparation. Flexible expansion options.

To the product:

> SIH 20 TE


Just everything. From a single source.

The better the building insulation, the more important ventilation becomes - for energy efficiency, health and property value preservation. Combine your heat pump with central or decentralized ventilation systems from Dimplex.


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Miracle heat pump – simply use more environmental energy. No other heating system works more efficiently, more economically and more environmentally friendly.