Air-water heat pumps are the sustainable replacements for current gas boilers.
Heat pumps are known for their extremely high efficiency and environmentally-friendly characteristics. The system is at least four times more economical than a conventional gas boiler and emits considerably less CO2.

The air-water heat pump effortlessly supplies hot water for central heating and sanitary purposes the whole year round – and provides cooling in the summer. Air-water heat pumps extract more than *5% of the energy consumed from the outdoor air (to **0 °C). As a result of the split setup of the heat pump,
the outdoor unit can easily be installed in the garden, on the patio or on a flat roof. There is often enough room for the indoor unit (the hydrokit) in a storeroom, the garage or the existing boiler room. The coolant pipes between the two appliances will bridge a distance of as far as *0 metres.

The efficiency of a heat pump is expressed as its Coefficient of Performance (the ratio of the useful heat to the energy , COP). Because DUWACO’s air-water heat pumps heat water on the basis of a low temperature, a high COP value is achieved (the lower the water temperature, the higher the COP value). In practice, water of an average temperature of *5 to *0 °C is delivered.

Heat pumps achieve the highest COP values if they are used in combination with wall and floor heating.
DUWACO supplies two models of air-water heat pumps, the specifications of which are given below.

The advantages of air-water heat pumps are as follows:

• up to *0% more economical with regard to energy costs than natural gas systems (in combination with solar panels, the savings may even be as high as *5%!);
• *0% cheaper than a system that uses ground drilling;
• yield extra savings as a gas connection is no longer needed;
• top efficiency, 4 times more than the best condensing boilers;
• no fire or CO hazard;
• multifunctional, since the system can be connected to wall  and high efficiency radiators;
• contribute to a large reduction in CO2 emission and other harmful substances;
• double function: heating in the winter, cooling in the summer;
• *-year manufacturer’s warranty;
• the *-year manufacturer’s warranty can be extended by a maintenance contract of 5, 8, *2 or *5 years.