Heat Recovery Units Ø100 mm

Ø100 mm heat recovery units for local ventilation of smaller rooms

The Ø100 mm heat recovery units category brings together compact local devices designed to ventilate smaller rooms such as bathrooms, toilets, small bedrooms and hallways. A Ø100 heat recovery unit is the ideal choice when you need efficient supply-and-extract ventilation with heat recovery but have no space for a larger unit. Despite the small diameter of the duct penetration, it delivers a steady airflow, reduces humidity and prevents the formation of mould.

Our range includes various versions, from simple models for basic local ventilation to advanced solutions with multiple speed settings, quiet operation and the option of advanced control. This lets you choose a 100 mm heat recovery unit that adapts optimally to your room and usage pattern, with minimal construction work and low electricity consumption.

Mini and local Ø100 mm heat recovery units for bathrooms and smaller rooms

A mini heat recovery unit or a local Ø100 mm system is particularly suited to rooms with persistent humidity and rapid temperature changes, most often as a bathroom heat recovery unit or for a separate toilet. Installing such a system provides a constant supply of fresh outdoor air while simultaneously extracting stale air, with most of the heat being transferred back into the room.

This category also includes specialised models such as aRheat and selected Ø100 mm heat recovery units that combine high efficiency, quiet operation and easy installation. Such mini heat recovery units are an excellent solution for bathroom renovations or smaller apartments where installing a central system is not an option.

Ø100 inline heat recovery unit – discreet installation in a wall or duct

The Ø100 inline heat recovery unit is designed mainly for installation in an external wall or a short section of round air duct. Thanks to the 100 mm diameter, the penetration into the structure is minimal, which makes installation easier in both new builds and renovations. At the same time, such a solution usually does not require a complex duct system, as the device works directly through the wall – meaning less intervention and faster installation.

Advanced features: WiFi, filtration and easy control

More modern Ø100 mm heat recovery units can be equipped with additional features, such as a WiFi heat recovery unit, which allows control via a mobile app or smart home system. This means you can adjust the airflow and operating modes to your schedule and reduce energy consumption when the room is not in use.

Special attention is also paid to filtration. Selected models have built-in filter cartridges that remove dust and larger particles from the air, contributing to better indoor air quality. The filters are easy to replace, ensuring long-term and hygienic operation of the device. For more demanding buildings, we recommend combining the Ø100 heat recovery unit with more advanced heat recovery systems in other rooms, for a unified ventilation concept across the entire apartment or house.

When to choose a Ø100 heat recovery unit instead of a larger diameter?

A 100 mm heat recovery unit is the optimal choice when:

• you are dealing with a smaller room (bathroom, toilet, small bedroom),
• you want a minimal wall penetration and a discreet external finish,
• there is no space or need for a larger local or central system,
• you need a quick and cost-effective solution for locally tackling humidity and odours.

For larger living spaces, or if you want to connect several rooms into a single system, it is worth also considering more powerful models or a combination with other heat recovery unit categories. For help with your choice, you can contact our support team, who will help you find a suitable local system based on the size of your rooms and your usage pattern.

FAQ – Frequently asked questions about Ø100 mm heat recovery units

Which rooms is a Ø100 heat recovery unit best suited for?

Most often, Ø100 mm heat recovery units are used in bathrooms, toilets and smaller rooms where constant extraction of humidity and a supply of fresh air are needed, without major construction work.

Is a mini heat recovery unit enough for an entire apartment?

A Ø100 mini heat recovery unit is designed as a local solution for a single room. For an entire apartment, several local units are usually combined, or another type of system is chosen, depending on the layout and the desired level of comfort.

How demanding is the installation of a Ø100 heat recovery unit?

Installation usually involves making a Ø100 mm penetration through the external wall, fitting the duct and the device, and connecting it to the power supply. With some models, installation of a local heat recovery unit with fitting by authorised contractors is also possible, which ensures correct operation and warranty conditions.