According to 7/2006 (V.24) TNM decree, all buildings occupied after the day of 31 December 2020 must meet the requirements of the nearly zero energy demand buildings. The energy demand of the building should be provided by at least 25 % renewable energy source which is generated in the building, comes from the real estate or produced nearby. This requirement can be easily satisfied with a heat pump system.
Heat pump is a device which can visualize the energy of mediums carrying „dilute” energy (low temperature but relatively large quantity) at higher temperature by energy investment. Heat pump is suitable for heating, cooling, producing domestic hot water (with electric auxiliary heating). Considering the simplified structure, heat pump consists of an evaporator, a compressor, a condenser, and an expansion valve.
Heat pumps are mostly referred to by combinations of the name of the heat carrying and transferring medium or by the heat source. According to this there are air-to-air, air-to-water, water-to-water, water-to-air heat pumps, in which the denomination of the first part belongs to the heat source, and the second part belongs to the heat transferring medium. The heat source of the heat pumps can be outside air, water (river, lake, sea), ground, ground-water, rock and waste heat. According to energy efficiency, groundwater heat pump is the best solution, however, due to the high investment costs of well drilling the use of air-to-water heat pump is the most widespread.
The air-to-water heat pump system consists of an outdoor and an indoor unit. A domestic hot water cylinder can be connected to the system, but there are also devices integrated with a DHW cylinder. The system uses the heat energy extracted from the outside air for heating the heating system and the domestic hot water, and for cooling in summer. On the heat emitter side, heat pumps can be fitted well with low temperature heating systems such as under-floor heating, wall heating/cooling, ceiling heating/cooling, fan-coil, chilled beam, etc.
The benefits of heat pump:
- environmentally friendly, using renewable energy
- much lower CO2 emission compared to the gas boiler
- outstanding energy efficiency
- low operating costs
- easy installation
- can be operated with a discounted electricity tariff (H-tariff, GEO tariff can be requested, or can also be operated from solar panels)
- can also be used in heating and cooling mode
- low temperature heat emitters can be connected to the heat pump which provide high level of comfort (eg. under-floor heating, ceiling cooling)