TwinFresh Style mini local recuperator

Compact single-room recuperator

VENTS TwinFresh Style mini is a decentralized, wall-mounted single-room recuperator that supplies fresh air to the room while at the same time recovering heat from the exhaust air. It is designed for comfortable ventilation without the constant need to open a window, helping to maintain a more pleasant temperature and a quieter living environment.

Main advantages

• Up to 81% heat recovery
  The regenerative ceramic core transfers heat from the exhaust air to the supply air, helping to reduce heat losses and the feeling of cold drafts.
• Three speeds and three operating modes
  Automatic mode, heat recovery mode and exhaust mode are available, so operation can be adapted to the room’s everyday needs.
• Humidity-based control
  The built-in relative humidity sensor allows the unit to respond to actual room conditions and helps maintain a more balanced climate.
• Low noise level
  At speed I, the sound pressure at 3 m is only 21 dB(A), making the unit suitable for bedrooms, work corners and other quieter spaces.
• Easier wall installation
  The compact design with a fi100 channel and a wider wall thickness range of 155–500 mm makes installation easier in many common wall constructions.

Regenerative heat recovery

The heart of the unit is a regenerative ceramic heat exchanger. In heat recovery mode, the device operates in short alternating cycles: first it extracts stale air from the room through the ceramic core, heating it in the process, then it supplies fresh air from outside through the warmed core. In this way, heat is stored in the ceramic and reused when supplying air. According to the independent DIBt test report (LU-A 20), the unit achieves up to 81% heat recovery efficiency, while the stricter Ecodesign calculation states a 71% thermal efficiency. Both values are important: the first shows an excellent test result, while the second provides a more conservative official figure for the same unit.

In ventilation mode without heat recovery, the device moves air in one direction, making it suitable for quick airing or more intensive room ventilation when the main goal is air exchange.

Control

Primary control is via the built-in sensor control panel on the indoor unit. This allows simple everyday use without additional complications. An infrared remote control RK1 is also available as a separate accessory if desired. The unit supports a weekly schedule, party mode and night mode, so operation can be adjusted to the rhythm of the day and the room’s needs.

When the unit is switched off, the automatic closing damper closes the duct, helping to limit drafts and reverse airflow. Multiple TwinFresh units can be connected into one control network, where one acts as the master and the others as slaves, which is useful for coordinated ventilation of multiple rooms. There is also an input for connecting an additional external sensor CO2 or relay sensor, allowing operation based on the room’s needs.

Installation

VENTS TwinFresh Style mini is designed for through-the-wall installation with an air duct fi100. For installation, a wall opening from fi110 mm is required. The indoor control unit measures 248 x 305 x 64 mm, and the standard outdoor grille or cap measures 220 x 231 mm. With the standard outdoor cap, wall thickness adjustment is possible in the range of 155–500 mm.

The unit is intended for a single room of approximately 15 m2, making it suitable for a bedroom, living room, home office or similar space. The set includes a replaceable G3 filter for basic supply air filtration. The housing has IP24 protection, and when idle, airtightness is classified as D1 according to EN 13141-8, helping to limit unwanted air leakage when the device is not operating.

Technical specifications

Energy efficiency

The model has energy class A according to EU regulation 1254/2014. For 2016, the label also states 48 dB and a maximum airflow of 30 m3/h.

• SEC, cold climate: -78.6 kWh/(m2 per year)
• SEC, moderate climate: -38.1 kWh/(m2 per year)
• SEC, warm climate: -14.8 kWh/(m2 per year)
• AEC: 173 kWh/year
• AHS, cold / moderate / warm climate: 8294 / 4240 / 1917 kWh primary energy/year

Frequently asked questions

How much heat does the unit actually recover?
According to an independent test, it achieves up to 81% heat recovery, while the official Ecodesign calculation states 71% thermal efficiency. Both figures are correct; they are based on different evaluation methods.

Do I need to buy a remote control separately?
No. The unit can already be used via the built-in sensor control panel. The RK1 remote control is only an additional option.

What size room is one unit suitable for?
The manufacturer states approximately 15 m2, so the unit is intended for one room, such as a bedroom, living room or home office.

How loud is it at the lowest speed?
At speed I, the sound pressure at 3 m is 21 dB(A), and at 1 m it is 30 dB(A). This is a very low level for everyday use in quieter spaces.

Is installation complicated?
It is a through-the-wall installation with a fi100 channel and a required opening from fi110 mm. In many cases, it does not require major interventions, but proper wall preparation and correct installation are important.

Conclusion

VENTS TwinFresh Style mini is a good choice for anyone who wants local ventilation with heat recovery, simple control and a compact wall-mounted design. It combines automatic operation, low energy consumption, basic filtration and the comfort of fresh air in one room.