M-WRG mit Wärmerückgewinnung


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You can breathe, because we deliver fresh air!

Clean air is important for people to feel good indoors. Good air is an important factor for your health and wellness. Faultlessly functioning ventilation for living spaces do not just ensure a healthy room climate where people enjoy to stay. Because of technical developments and justified energy saving considerations,modern house walls and windows are constructed more and more airtight. The resulting reduction of fresh air ventilation between the interior and the exterior can easily cause damage to the building materials, like mould or dampness, which could be prevented with a systematic ventilation of rooms. The most common kind of ventilation – opening the window – is the simplest form of fresh air ventilation, but does not comply with state-of-the-art technology and besides: we are often unable to cope with ensuring correct ventilation.

Heat recovery protects household and the environment

The term heat recovery (WRG for short) stands for different methods for the utilization of the thermal energy. This waste heat is not only produced as exhaust air in air conditioning systems and refrigerators. On a large scale, heat recovery also works from exhaust air in various industrial processes. For builders and homeowners who are planning to build a new building or renovate an old building, a ventilation system with a heat recovery system is recommended. The high efficiency of more than 90% brings considerable savings. At the same time, the reduction of energy costs is the top goal of every measure for heat recovery. However, the lower use of primary energy also meets ecological requirements, such as the reduction of CO2 emissions. In addition to energy saving, the protection of the living space, the ventilation without external noise, protected rooms for pollen allergists as well as harmless and comfortable room air conditions are the advantages of a living room ventilation unit.

A ventilation unit with heat recovery has many advantages

In times of rising energy costs, spending on a ventilation unit with heat recovery is a sensible investment in terms of today's building standards and for the future. A decentralized Meltem M-WRG ventilation device with heat recovery itself only needs a little electricity (from 3.8W) per device but recovers 22 times the amount of heat for every kilowatt-hour consumed. The heating requirement of the house is reduced by the heat recovery, as e.g. a Meltem M-WRG ventilation device provides a ventilation contribution to the annual heating work of 16.07 kWh / m²a. With up to 6 decentralized Meltem devices in a single-family house, this is just under 100 kWh / m²a or heating costs of approx. 195 €. Not only can the heating costs be reduced considerably, but also pollutant emissions. In relation to heating oil as an energy source, this is just under one tonne of CO2 that can be saved in a detached house per year, while natural gas, which is produced more cleanly, is 750 kg per year. Important: The ventilation heat losses of the house or apartment are reduced by over 50% by a ventilation device with heat recovery compared to window ventilation!

There are also positive health aspects. The operation of a ventilation device with heat recovery ensures a uniform and comfortable room climate and prevents the formation of mold. The outside air is sucked in, filtered and cleaned in the process. Special supply air filters such as allergy-free or activated carbon filters are available for this, which not only hold back fine dust, but also bacteria and odors. Used air is extracted, passed through a cross-flow plate heat exchanger and the heat from the exhaust air is used to heat the fresh air flowing in separately. The air exchange ensures that excessive concentrations of pollutants (CO2, VOC, house dust, etc.) are reduced and contributes to a healthy indoor climate. Important: Supply and exhaust air are routed separately and filtered accordingly. This guarantees hygienic air changes, unlike decentralized reversible fans, which lead the supply and exhaust air over the same path and only filter one side.

When air is exchanged via the ventilation device, there is no unpleasant draft as a risk for colds. Thanks to the user-independent controlled ventilation, there is no need to keep opening the windows. Pollen, insects, dust, exhaust fumes and noise stay outside. Allergy sufferers can literally breathe a sigh of relief, and the night's rest is also undisturbed. Every M-WRG ventilation device with heat recovery works extremely quietly and can be controlled as required with the appropriate mixed gas / CO2 or humidity sensors.