Transforming a commercial space into a small, healthy apartment? Zehnder's ComfoAir Fit 100 semi-decentralized dual-flow CMV is ready for the challenge.

By André Sudrie - PR Agency Published on Wednesday, August 27, 2025 at 11:30

Photo credits : ZEHNDER VENTILATION

Summary for decision-makers

A former commercial space of 45 m² was converted into a one-bedroom apartment, with a living room, kitchen, and bathroom on the ground floor and a bedroom upstairs. The Zehnder ComfoAir Fit 100 ventilation system was chosen to ensure air quality while maximizing available space and maintaining the apartment's aesthetic appeal.

This wall-mounted, dual-flow ventilation system ensures optimized air renewal without encroaching on living space. Thanks to its enthalpy exchanger and adapted flow rate, it provides comfort, energy efficiency, and ease of installation, completed in two days by a certified installer from the specialized Parten'Air Zehnder network.

In Binic, a former commercial space has been converted into a small rental apartment. To address space constraints while ensuring good air quality, the installer, Parten'Air Zehnder, installed the Zehnder ComfoAir Fit 100 compact dual-flow ventilation unit, ideal for renovation projects with tight space constraints.

Optimal integration of dual flow ventilation in a small space

A small but complex accommodation!

With a surface area of 45 m2, the former commercial premises transformed into a one-bedroom apartment consists of a living room, a kitchen and a bathroom on the ground floor as well as a bedroom upstairs.

To ensure a healthy indoor environment for future tenants by providing fresh air while eliminating humid and stale air in all rooms of this constrained space, the installer had to meet a double challenge:

discreetly integrate an efficient ventilation system into a small area, without compromising the aesthetics or ergonomics of the premises,
optimize space to achieve efficient air distribution without encroaching on living space.

Zehnder ComfoAir Fit 100, air quality and integration guaranteed

Given the space constraints of this project, the installation of the new Zehnder ComfoAir Fit 100 semi-decentralized dual-flow ventilation unit was essential. Built into the wall, it integrates aesthetically into the existing structure thanks to its compact dimensions (L 465 x H 821 x D 216 mm).

The enthalpy heat exchanger ensures heat and moisture recovery, ensuring a comfortable indoor climate while eliminating the need for condensate drainage. With a flow rate of 110 m3/h, Zehnder ComfoAir Fit 100 is fully adapted to the future needs of this small apartment.

The implementation of this dual-flow ventilation system only requires a limited and optimized air distribution network thanks to the CK300 box and the RapidLock connection system facilitating the connection of the ducts.

Thus, it only took two days for the company LE GALL, Installateur Parten'Air* Zehnder, to carry out the drilling in the facade in order to install the external grille for the arrival and evacuation of new and stale air, the installation of the network and the machine.

Thanks to all of its well-thought-out technical solutions, the owner and their future tenants will benefit from accommodation that combines indoor air quality, aesthetics and energy performance.

Launched in 2013, the Parten'air Zehnder network now comprises 200 installers specializing in dual-flow ventilation, trained in the brand's systems, in order to offer quality installations combining a healthy indoor climate and energy savings.

Frequently Asked Questions for Decision Makers

What are the advantages of the Zehnder ComfoAir Fit 100 dual-flow ventilation system?

It offers optimal air quality and heat and humidity recovery, while its compact dimensions allow for discreet integration. It requires no condensate drainage and improves the energy efficiency of the home.

What was the main constraint when moving into this 45 m2 apartment?

The main challenge was to integrate a high-performance ventilation system without encroaching on living space or harming the aesthetics of the small apartment.