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Single room heat recovery units - wall mounted

Photo of product family: Single room heat recovery units - wall mounted

Wall mounted heat recovery units

Single room heat recovery units are also referred to as wall heat recovery units, ductless
HRUs
, push-pull units, etc. This type of heat recovery unit is recommended when
the traditional mechanical ventilation system with heat recovery cannot be installed,
e.g. when there's no space for the network of ductwork.

MVHR unit for older buidlings

Wall heat recovery units are often mounted in an existing, older building, especially for retrofitting, refurbishment applications. Room heat recovery units are recommeded when the issue of poor air quality arises due to not working gravity ventillation system. Poorly working natural ventilation system often leads to high indoor humidity and the risk of mould growith. 

Centralised vs decentralised MVHR system

In comparison to wholehouse ventilation system, where the unit is installed in utility room like a laundry room, single room heat recovery units as the name suggests must be
installed in every room separately. It's recommended that the units are installed in pairs, so the one unit supplies fresh air, while the other one removes extracted air.

Single room heat recovery units - wall mounted - Products range
Miniature picture Product code Name of product Files to download
Photo of product Single Room Heat Recovery Units for through-wall installation HRU-WALL

Single Room Heat Recovery Units for through-wall installation

HRU-WALL is a single-room decentralized heat recovery unit for concealed installation. The wall mounted heat recovery unit comes with a ceramic heat exchanger which boasts a maximum heat recovery ratio of 90% (the nominal heat recovery ratio is η=74.3% as per EN 13141-8:2011).

How does it work?

The energy-efficient EC fan changes the running direction every 70 seconds to alternate between air supply and air exhaust. Low energy consumption and extremely low operating noise make this heat recovery unit a recommended
solution for non-stop operation. The heat recovery unit has three speed levels to choose from, depending on the size o the area and indoor demands.

How to select the single room heat recovery unit?

HRU-WALL-100-25 model provides a sufficient air change level in areas up to 19m2.
HRU-WALL-150-60 model provides a sufficient air change level in areas up to 45m2.

Single Room Heat Recovery Units for through-wall installation
Photo of product Push-pull heat recovery unit with remote control HRU-WALL-RC

Push-pull heat recovery unit with remote control


HRU-WALL-RC is a bidirectional ventilation unit, often described as decentralized
or push-pull, with regenerative ceramic heat exchanger. It is intended for
single-room installation, usually installed in synchronized pairs.

The heat exchanger material together with its unique honeycomb structure gives
a maximal 82% thermal efficiency ratio (74% acc. to 1254/2014 EU Directive
reference measuring point).

The casing is made of ABS. The operating principle is analogous to HRU-WALL - unit is working in alternating flow mode, switches the air flow directions every 40-120 seconds
(push-pull) and it’s equipped with an energy-efficient EC fan (maximum power consumption is only 6 W).

The RC version has several advantages:
• Remote controller with an LCD
• 5 speeds: 20-30-40-50-60 m3/h
• Double filter (inner and outer side)
• Multicolour LED for status indication
• Automatically manages the cycle length in COMFORT mode
• Dirty filter visual indicator
• Boost function - maximum airflow for limited time – 5th speed for 15 minutes
• Integrated humidity sensor – smart humidity control, increases speed if rapid rise of relative humidity is measured
• Anti-frost protection
• Free-cooling - only one direction.

Push-pull heat recovery unit with remote control
Photo of product Single room heat recovery unit with Wi-Fi module HRU-WALL-WI

Single room heat recovery unit with Wi-Fi module

 
Ductless single room heat recovery unit comes equipped with a WiFi module. Its basic parameters, including max. heat recovery 82%, airflow rate 60 m3/h, and low sound power level 38 dB (A), are identical to those of the HRU-WALL units.

What makes this model unique? Convenience. HRU-WALL-WI single room ventilation units have a Wi-Fi module built in, which enables wireless control of the units. You need to download the free WallAIR app on your smartphone or tablet to operate them.

With the addition of a Wi-Fi module, the device can be connected to a local wireless network and controlled via a mobile app. Moreover, the app allows the pairing of devices by assigning two or more heat recovery units to a group. It is possible to have many groups so that 1 application can serve all HRV units in a building.

If we struggle with high levels of humidity in the apartment due to poorly functioning gravity ventilation, we might also consider a single room heat recovery unit. A temperature and relative humidity sensor is integrated into HRU-WALL-WI heat recovery units so we can monitor the humidity with the WallAIR app.

Single-room heat recovery ventilation is most effective when two units are mounted in two opposite rooms, both units assigned to the same group in the application. The above configuration allows devices to be synchronized for alternate operation (while one unit supplies air, the other extracts). Synchronization is completely wireless (WiFi), which minimizes installation costs.

Single room heat recovery unit with Wi-Fi module
Photo of product Window reveal module for single room heat recovery units HRU-WALL-WREV

Window reveal module for single room heat recovery units

 

A window reveal module for the decentralised heat recovery units - HRU-WALL series. The module is intended for installation in the facade, in the insulation layer, a ventilation grille is mounted on the window reaveal. The window reveal module provides practically invisiable solution for supply/extract ducting. This method of installation will be especially useful during the thermal modernization of the building. The product has a universal layout, the choice of "right-sided" or "left-sided" assembly is made at the construction site. In addition, a slope for possible condensation growth was implemented into the design.The duct is telescopic, which means that the distance from the axis of the HRU to the window reveal can be adjusted in the range of 380-490 mm.

Window reveal module for single room heat recovery units
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