The KERS+ units are designed to perform the following functions in each individual room:

• Provide fresh air ventilation from outside the building, with an airflow of up to 50 m³/h of fresh air.
• Recover up to 97% of heat from the extracted stale air in order to heat (in winter) and cool (in summer) the incoming air, resulting in significant energy savings.
• Filter the air coming from outside and that extracted from the rooms.

These units are intended for use in residential buildings, particularly for ventilating spaces where centralized systems are not deemed necessary. They can be installed through walls and are therefore well-suited for the recovery and partial renovation of spaces prone to mold due to inadequate ventilation.

The maximum air flow rate of each unit is 25 or 50 m³/h, depending on the model. Since they operate 50% of the time in extraction and 50% in supply, the air exchange rate is reduced to 12 m³/h and 25 m³/h, respectively. The KERS recoverers provide sufficient air exchange for rooms with floor areas of 9 sqm or 20 sqm, depending on the model (with air exchanges of 0.5 vol/h and internal height of 2.7 m).

The machine is equipped with an energy recovery EC motor fan, capable of reversing the airflow inside the heat exchanger, and operates in two phases:

Phase 1:

The fan extracts warm air from the room and expels it outside through the heat exchanger. This cools the air and retains the heat contained in it.

Phase 2:

The fan reverses the flow and draws in cold air from outside. Upon contact with the heat exchanger, this air is heated before entering the room.

The standard remote control allows you to:

• Use Kers+ in extraction-only mode or supply-only mode.
• Adjust the fan speed based on the desired humidity.
• Set automatic nighttime attenuation.
• Set automatic ventilation based on three humidity thresholds.
• Activate the boost extraction function at maximum speed for 30 minutes to quickly remove unpleasant odors.
• Turn on and off Kers+.

Using the buttons on the device, you can:

• Set the three operating speeds.
• Set the heat recovery mode and activate automatic nighttime attenuation.
• View the operating speed and the need to clean the filters through LEDs.

The grilles are installed as shown in the instructional video:

Specification Section VRKS27 - KERS+ 25 Recovery Unit with Remote Control

Precise heat recovery unit, to be inserted into perimeter walls, with a highly efficient hexagonal ceramic exchanger, capable of treating a maximum airflow of 25 m³/h of air alternately in supply and exhaust modes, for a usable internal volume of up to 25 m³. Equipped with automatic windproof sealing as required by CE13141-8 Regulations, night mode function (nighttime noise attenuation), and humidity function. Sound pressure at 3m less than 29 dB according to UNI EN ISO 3746:1997, acoustic attenuation of external noises by 44 dB, energy-efficient EC motor, electrical consumption less than 3.35 W. Supplied with a remote control.

VRKS52 - KERS+ 50 Recovery Unit with Remote Control

Precise heat recovery unit, to be inserted into perimeter walls, with a highly efficient hexagonal ceramic exchanger, capable of treating a maximum airflow of 50 m³/h of air alternately in supply and exhaust modes, for a usable internal volume of up to 50 m³. Equipped with automatic windproof sealing as required by CE13141-8 Regulations, night mode function (nighttime noise attenuation), and humidity function. Sound pressure at 3m less than 29 dB according to UNI EN ISO 3746:1997, acoustic attenuation of external noises by 42 dB, energy-efficient EC motor, electrical consumption less than 4.97 W. Supplied with a remote control.

Diagrams and Charts

To install the KERS+ recovery unit, it is necessary to create a through-hole in a wall in contact with outdoor air, with the diameter indicated in the figure, thanks to the telescopic duct, Kers adapts to the wall thickness without the need for tools. Normal 230 V electrical supply is required, and adjustment can be done with the recessed buttons on the device or via the remote control included in the package.

Installation Requirements for Kers