Due to structural airtightness and better insulation materials, low-energy houses require a sufficient amount of air to be provided by means of forced ventilation. The optimum solution is a heat recovery ventilation system. Such a system ensures a constant supply of fresh air, optimum microclimate and energy efficiency. The basis of such ventilation systems is a heat recuperator. This is a heat exchanger in which the flows of waste outbound air and fresh inbound air cross. The two air flows do not mix within the heat exchanger, but only transfer heat through the exchanger fins. Two fans regulate the flow of air, while the built-in filters cleanse both fresh and waste air. Apart from reduced heat losses and a constant supply of fresh air, heat recovery ventilation provides constant humidity, filtered air, lower CO2 concentration and less unpleasant odours.


Heat pumps draw heat from the environment and transform it into a suitable form for room and sanitary water heating. They can draw heat from the air, groundwater and surface water as well as from soil and rocks. Heating with heat pumps is energy efficient and environment friendly. Which heat source is the most suitable depends on the energy consumption of the house, the heating system installed and environmental conditions. The heat pump principle is based on the solar heat deposited in the nature, which heats up the medium in the collector system by a few degrees. The heat pump then lifts the temperature to the level suitable for radiator system and sanitary water heating. This technique boasts a few times greater efficiency than other available heating techniques, and allows us to save up to 80 percent of house and sanitary water heating energy.

Underfloor heating

Underfloor heating is a low-temperature heating system, where the floor becomes the heating device. Heat is transmitted by water, which is circulated through cement covered pipes. The heat transfers to the floor construction, thus heating the room air. Underfloor heating is usually used as an independent heating system and is increasingly popular in new constructions. Underfloor heating has numerous advantages not only in terms of energy savings but also in terms of living comfort. Heat is distributed evenly from floor to ceiling, the heating devices are invisible, the energy losses caused by airing are smaller than with radiator heating, and the heating cost is reduced by an average of 6 to 12 percent. The air in the living areas is not as dry, while slower air movement also decreases dust raising and circulation. This heating system is more people and environment friendly.

Solar collectors

Sun is an inexhaustible source of renewable energy, which is available throughout the year free of charge. The energy required annually on a world scale is produced by the sun in but three hours. The sun’s energy can be directly exploited by solar collectors or solar thermal collectors, which heat the water in the storage tank directly or through a medium. They can be used for sanitary water heating as well as room heating. The one thing that needs to be considered upon installation is their purpose, i.e. sanitary water or residential heating. The optimum variety and placement are chosen accordingly. Solar collector utilisation can provide up to 60 percent of the annual sanitary water heating energy. Due to the growing prices of energy products, the use of solar collectors is justified in terms of economy and environment friendliness, as it decreases greenhouse gas emissions.

Gas heating  

Gas heating has numerous competitive advantages over other energy product utilisation. Gas use is more eco-friendly, and CO2 emissions from gas combustion are considerably reduced in comparison to other fossil fuels. Gas combustion does not produce smoke or soot. From the investment point of view, gas heating appliances are competitive, while the efficiency of modern gas furnaces significantly exceeds that of other furnaces. Gas condensation boilers even boast efficiencies exceeding 100 percent. Natural gas is the most efficient as well as eco-friendly energy product. 9 out of ten energy units reach the heating device. The overall efficiency of gas, from pumping to pipeline distribution, is as much as three times greater than the overall efficiency of electrical energy.
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