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KfW 60 energy-saving house

We have so much of our house told, not only do we build a Kfw 60 energy saving house.

We favored a heat pump for heating, It was very close to build a KfW 60 house. We asked our contractor if it would be possible without much effort. He had the whole of his structural engineer / Heat Protection Officer by count, and lo and behold, there were not many extra costs. Our joint venture has so far had never built an energy efficient house and since the future always goes in that direction, he is now building our house as a "model house" and has adopted us as some of the additional costs. What are our neighbors now enjoy something, for he must bear it, not all costs, even if our neighbors can not Kfw 60 build house. That's it!

Here is a brief definition of what a Kfw 60 is energy efficient house:

• After the funding of the Kreditanstalt für Wiederaufbau (KfW) is the standard, KfW energy saving house 60 achieved when the primary energy demand demonstrably not exceeding 60 kWh per m² floor space and year. This house type can be equipped with a conventional heating system. A ventilation system is usually not necessary. Due to the improved heat protection one for future energy price increases better equipped than the standard EnEV house.

Because we had chosen a different heating system than a normal gas boiler technology, we had only once through the whole mess to work through different heat pumps.

• brine-water heat pumps are the most common type because they can be operated year-round because of the existing geothermal sufficient without additional heat source. acts as a heat transfer medium on the heat source side a water-antifreeze mixture (brine), which receives in a closed loop geothermal heat and emits through a heat exchanger to the refrigeration circuit of the heat pump . A heat exchanger between the heat source circuit and the heat pump can be omitted when using the so-called direct evaporation technique too. Here, the use of geothermal energy collectors installed horizontal copper tube, in which circulates the refrigerant from the heat pump. The advantage of this technology is to occur through the omission of a heat exchanger, less losses and a separate pump to drive the heat source circuit may be omitted, since this task is performed by the compressor unit of the heat pump. (Source WIB eV)

• water-water heat pumps work because of year-round adequate existing (ground) water heat monovalent (ie, without additional heat source) and obtain the best performance figures for all types of heat pumps. As a heat transfer medium on the heat source side to function mostly groundwater in a Saugbrunnen constant at 8 - is encouraged 12 ° C and some of its heat in a heat exchanger sold to the cooling circuit of the heat pump . The cooled water then leaves the system via a return well. (Source WIB eV)

• The air-water heat pump used for heating the surrounding air. The big advantage is that for this type of "heat supply" not a big effort has to be: the air we just sucked. Therefore, the acquisition is also cheaper than other heat pump systems. are air-water heat pumps for indoor and and outdoor installation. But both have in common that the ambient air drawn on a heat exchanger that is part of the refrigeration cycle is guided by the heat pump. On the heating circuit is a conventional, connected by water flowing through radiators or underfloor heating. Modern air-water heat pumps generally work to about -7 ° C alone and needing only at lower temperatures an additional heating, which usually consists of an electric heater. However, this additional heat source in our part of the very rare (a few days a year) for use . (Source WIB eV)

• exhaust air heat pumps escape the heat source air and enter the recovered heat energy on to the same medium. Virtually every air conditioning unit can be described as air-air heat pump, where the benefits are, however, mostly for the active cooling of rooms. When you find the air heating / air heat pump for reheating of fresh air in mechanical ventilation systems. These devices are often referred to as a "building technology centers", "heat centers" or "heating centers". (If the heat pump is also responsible for heating of hot water, but you have to correct, by a combination of air-air and air-water heat pump .) Central ventilation systems talk about sucking air ducts used and moist air from bathroom and kitchen off. At a central location (such as utility room), a portion of the heat in the air is either fed directly to the evaporator of the air-air heat pump that heats the condenser side of the drawn in through the ventilation system fresh air. Often, these compact central heating systems are equipped with heat exchangers that provide a direct heat transfer from the ex-to fresh air, here we speak of ventilation with heat recovery. The heat pump has to overcome then only a small rise in temperature to provide space heating. The Conditioning blows this warm air then again through ventilation ducts in the living rooms. The power consumption of such heating systems is usually a few hundred watts to drive the refrigeration cycle of the heat pump and the fans for supply and exhaust air. The space required is about 1 m 2 area and about 2 m height. (Source WIB eV)

We have an exhaust air heat pump from the company Nibe (largest producer of heat pumps in Scandinavia) decided with underfloor heating. We should also heat the basement, we have even in the basement floor heating. This is cheaper, to join as a second heating circuit with low temperature radiators.

Moreover, it is far from being easy to find a suitable installer (or one who has ever needed to create a an offer ...). But that would be a topic for a separate thread.