Heat Recovery Unit

WAFE 350 EFS is a premium heat recovery unit that fulfils our customer philosophy: We think the same way you do. Everything has been designed for a carefree and easy operation of the unit. The unit ensures easy and safe handling. The reliable functioning is ensured by components from the top German, Czech and Dutch producers. WAFE 350 EFS also contains the unique EFS technology developed by us. Thanks to this technology, the unit runs with one reliable HRV exchanger over the course of its lifetime providing the benefits of enthalpy. The EFS technology significantly reduces spending on operating costs and helps you keep a pleasant humidity level at your home. The cost-benefit ratio of WAFE unit represents the best choice on the market. It is designated for larger flats and family houses.


  • Minimal interaction required thanks to the autonomy of the unit which allows for automatic dynamic environmental adaptation

  • Humidity recovery efficiency: Innovative Enthalpy Flap System helps retain optimal humidity and enhances the overall unit energy efficiency

  • Integrated CO2 sensor provides healthy environment and reduces operating and maintenance costs.

  • Low investment costs: No need for expensive complementary equipment

  • Low operating costs: Prolonged filter lifetime, low electricity consumption of fans, no air preheater, high heat exchanger efficiency

  • Control and monitoring: Apart from a standard connection via ethernet, we use also Sigfox IOT network connection. MyWAFE on-line system assures easy and smart unit control and maintanance.

Technical specifications

Air flow rate
<350 m³/h
Heat recovery efficiency
86 - 97 %
Humidity recovery efficiency
60-90 %
Operating temperatures
-30 až + 40 °C
1075 × 776 × 539 mm
35 kg

Application and Use

WAFE 350 EFS is a device suitable for family houses and larger apartments. For newly built as well as reconstructed. The unit has been fully certified by Passive House Institute founded by Dr. Feist in 1996.

WAFE 350 EFS is designated to satisfy all current standards of ventilation in residential buildings and it is fully integratable with most available SmartHome solutions through an open IP.


WAFE heat recovery operates in two basic modes:

CO2 mode: fully autonomous programme takes into consideration the amount of people present in order to run at the optimal level. It recognises by itself when nobody is home and reduces the output to the minimum. Thanks to this it saves even on the little amount of energy it needs to run.

Weekly mode: allows for user's adjustments through an on-line web app MyWAFE. It allows manual control of ventilation level based on time intervals.

In addition to these two modes, the user may also turn on “Boost”, which provides high ventilation level for limited time. Boost may be connected to toilet and bathroom light switch.

“Circulation” mode helps to distribute the air in the house more effectively while enjoying the fireplace or aromatherapy. You may find it handy to use other modes such as holiday mode, sleep/night mode or fireplace mode.

For its installation WAFE 350 EFS needs only some space in your utility room, link to the air distribution system, electricity and an access to the internet through an ethernet network cable. If you need to reduce humidity in your home, the unit may be connected to a drain pipe, which will allow you to use the HRV mode, making the unwanted extra humidity go to waste in the form of condensate. We consider the optimal relative humidity level to be somewhere between 40 - 60 %.



As well as heat, the WAFE 350 EFS recovers natural humidity as well. That with 60 - 90 % efficiency. So there is usually no need to use humidifiers. At the same time, the high heat recovery efficiency is preserved. Compared with other heat recovery units, the crucial difference can be observed when temperature drops below 0 °C. While other recuperators require operationally expensive air preheater to prevent condensate from freezing, WAFE units, thanks to innovative technology, do not need air preheater at all.



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Complete installation including heat recovery unit, installation of air distribution system, material and labor.