Viessmann NC-Box for natural cooling
Topics at a glance
A heat pump is not only an extremely environmentally friendly heating system but also highly versatile. This is because, in addition to its primary function of providing heat to residential buildings, it can also cool the air during warmer months. There are essentially two possible cooling methods: passive and active cooling.
Free cooling – passive cooling with heat pumps
Passive cooling (free cooling) works in conjunction with a brine/water or water/water heat pump. In a brine/water heat pump, the brine extracts heat from the heating circuit through a heat exchanger and transfers it to the outside. In a water/water heat pump, groundwater takes over this function. The natural ambient temperature is also used for cooling. Apart from the control unit and circulation pump, the heat pump remains off. Since no compressor is required, no electricity is required. This makes free cooling a particularly energy-efficient and inexpensive way to cool a building’s interior.
Pleasant cooling effect without annoying noise
Passive cooling can reduce room temperatures by approximately three degrees Celsius. Installation requires minimal effort, and there is no annoying noise during operation. Passive cooling can be achieved using both geothermal collectors and geothermal probes, with the latter offering higher performance.
System owners who want to use their heat pumps for heating in moderate climates need the so-called NC-Box. This is a fully assembled unit that integrates all the necessary components. Installation by a contractor is quick and easy.
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With active cooling, the heat pump’s function is simply reversed. This is accomplished by reversing the internal refrigerant cycle, and swapping the primary and secondary connections. Like a refrigerator, the heat pump actively generates cooling capacity. With this method, the compressor remains running, allowing the heat pump to utilize greater cooling capacity than with passive cooling.
Rooms at the right temperature thanks to natural cooling
The recovered heat can be used in a variety of ways.
Active cooling can be achieved using either a brine/water heat pump or an air-to-water heat source. Operation with a water/water heat pump is also possible. Fan convectors or underfloor and/or wall heating systems are suitable as cooling surfaces. Heat extracted from the rooms can be returned to the heat source or used to heat hot water. This effectively combines the heating and cooling functions of a heat pump.
Heat pump cooling products
NC Box
* NC-Box
* Natural cooling box
* Dissipates heat
* Affordable and energy efficient
* Compact and thermally insulated
* Quick and easy installation
