InVENTor Compact JW Decentralized heat recovery ventilation

For wall thickness 140-280mm 

  • Supply clean fresh air to the premises
  • Remove stale extract air from the premises
  • Prevent penetration of excessive humidity and appearance of mould
  • Protect against outdoor noise
  • Reduce the heating costs in winter and air conditioning costs in summer
  • Low energy demand

Energetic and compact

During the extraction mode it accumulates the heat of the room air. After 70 seconds, the Xenion reversible fan changes its rotating direction and the stored heat is released into the intake air flow. In this way it is possible to save up to 87 % of the rooms’ heat through the ceramic heat accumulator.

It is controlled via one of the following system controllers (not include in package and needs to be ordered)

  • sMove s4 (Control up to 4 units)
  • sMove s8 (Control up to 8 units)

Components Include in package

  • Inner cover incl. dust filter of class G4
  • Thermal accumulator inserts (thermal accumulator and inVENTron®)
  • Wall sleeve
  • Exterior closure


  • Pollen, micro and activated carbon filter options available
  • Sound and wind protection options available as accessory

Maximum capacity – 58 m3/h. (Heat recovery mode 29 m3/h)

Order item, 3-4 weeks


Energetic and compact

The InVENTor-JW ventilation system is designed to ventilate living rooms and bedrooms in single- and multi-family homes, hotels and guest houses, rooms in public facilities and work rooms in office buildings. It is designed as a solution for buildings with the special requirements of particularly thin exterior walls.

This unit has a special external hood, which discreetly conceals the minimal excess length. The installation is intended for a wall thickness from 140 mm (plastering/rendering included). The unit can be employed for both newly constructed buildings and in refurbishments.

The patented inVENTron technology, together with the new powerful Xenion fan, assures an all-over ventilation. With this technique, a maximum flow of 29 m3/h can be reached on heat recovery mode (58 m3/h in exhaust mode).

The ventilation unit InVENTor-JW comprises a wall sleeve into which a thermal accumulator insert is installed, as well as an inner cover and an exterior closure.

The thermal accumulator insert consists of the ceramic thermal accumulator and inVENTron®.Due to the flow-optimised design of inVENTron®, the two guiding vanes with embedded reversible fan XENION®, ensures efficient capacity utilization and an even flow through the thermal accumulator.


Feature  Value 
Operating range [°C]  -20 – 50 
Extract air/Outdoor air  Free from aggressive gases, dust and oils 
Air flow in reverse operation (push-pull) per unit [m³/h]  10.5 – 29 
Extract air flow per unit [m³/h] (EN 13141-8)  21 – 58 
Sound pressure level [dB (A)]  21 – 44 
Standard sound level differential [dB]  38 – 49 
Heat recovery [η’w]  Ø 0.7 / max. 0.82 
Output voltage [V DC]  6 – 16 
Power consumption [W]  1 – 3 
Flow based electrical fan capacity [W/(m³/h)]  0.18 
Protection class (EN 61140)  III 
Type of protection (EN 60529)  IP20 
Filter class (standard filter) (EN 779:2012)  G4 
Air flow sensitivity at ± 20 Pa (EN 13141-8)  Class S3 
Frost protection  Automatically due to push-pull operation (up to -20 °C) 
Wall thickness with render [mm]  > 140 
Wall opening [mm]  Ø 180 
Wall sleeve [mm]  Ø 160 
Weight [g]  3850 


The InVENTor-JW ventilation system is used to provide ventilation for living rooms and bedrooms. An integrated thermal accumulator in combination with the reversible fan XENION and the guiding vanes ensures optimum heat recovery with maximum air flow. 

The ventilation unit operates on the principle of heat recovery by changing the direction of the fan. The integrated thermal accumulator charges itself with heat energy from the room’s air as it flows to the exterior (extract air). After 70 seconds, each reversible fan XENION changes direction. When the reversible fan changes direction, it releases the stored heat energy into the incoming outside air (supply air). 

For this principle to work correctly and to ensure the room’s pressure stability the incoming air and extract air volumes must match, i. e. two InVENTor-JW units are required. These are operated in pairs in push-pull operation: One ventilation unit works in supply air mode while the other works in extract air mode at the same time. 

Due to the reversible fan XENION’s high pressure built-up and active speed control (integrated wind stabiliser) the air flow within the system is kept nearly constant. Thus, the air flow’s sensitivity to pressure variation meets the requirements of class S3 according to EN 13141-8 (max. 30 % air flow deviation at ± 20 Pa). 

In order to ensure the full functioning of the ventilation system throughout the entire year, an additional, flexible temperature sensor is integrated into the reversible fan XENION. This measures the temperature of the air flow. If the temperature falls below +5°C, the reversible fan is automatically switched to extract air mode for 4 cycles. This allows the thermal accumulator to heat up again and prevents cooling of the interior due to cold drafts. During this phase, the mode that has been set on the controller is ineffective. Subsequently, the controller switches the ventilation nit back to the originally selected mode. 

A multi-use dust filter of filter class G4 is integrated discreet and easy of access into the inner cover. It filters off reliably dusts as well as allergenic particles (such as pollen) from the ambient air before it can enter living spaces. Dust filters are season independent. For special requirements micro, pollen and activated carbon filters are available as an option. 

A decentralised ventilation system is based on the free movement of air between individual pairs of ventilation units. Therefore, internal doors must not have air-tight seals. Ensure adequate air transfer measures: An air gap of about 10 mm below the door, unscrew the hinges by 5 mm, use a ventilation grille or similar (cross ventilation). 

The ventilation unit is controlled via one of the inVENTer system controllers. Depending on the controller, operating modes and functions may be selected.