Due to stricter building regulations, e.g. the energy saving ordinance (EnEV), new-builds are becoming more or less hermetically sealed buildings without natural air exchange to the outside. However, everyday activities, such as cooking, washing, or showering, as well as the air breathed by the residents, increase the humidity in the rooms. Without sufficient ventilation, the health risks to people and to the building arising from mould forming are increased. To ensure the minimum hygienic air exchange, it would be necessary to air throughout for approx. 10 minutes every two hours. How can this be achieved in reality?
This is where controlled domestic ventilation solves the problem. Domestic ventilation ensures you have fresh air and great thermal comfort. The Kermi x-well domestic ventilation systems are available as central or decentralised systems – for renovations in existing buildings as well as for new-builds.
Controlled domestic ventilation installed retrospectively or planned right from the start. Kermi x-well particularly makes retrospective installation easy. During renovation, all the devices are positioned in the walls using simple core hole drilling. In a new-build, they can be installed directly into a special installation brick.
Single family house or multi-storey building, new-build or renovation. That means: little effort combined with low costs right from planning to installation.
The integrated heat exchanger heats up during the fan's exhaust air phase and after reversing the fan's direction, transfers the saved energy to the fresh air flowing in. That way, an efficient heat recovery is achieved.
With its elegant design, the outer cover fits perfectly into the look of the house. The glass surface of the design inner cover (x-well D12) with its attractive and high quality appearance is appealing and ensures optimal, low noise flow of the air.
Wall cross-section of the x-well D12 decentralised ventilation unit. In new-builds, it is embedded directly in the wall along with an installation brick. For renovations, it is installed by core hole drilling.
Thanks to its design without ventilation ducts, the x-well D12 is particularly suitable for renovations.
With the decentralised domestic ventilation unit Kermi x-well D12, the uncomplicated and quick installation of controlled domestic ventilation is possible in every building.
The decentralised ventilation system can be used for both renovation (with core hole drilling) as well as for new-builds (by using the installation brick). The devices can be wired up in a star shape and/or a daisy-chain.
Thanks to its design without ventilation ducts, the x-well D11 is particularly suitable for renovations.
|x-well D11||x-well D12|
|Wiring||Star-shaped wiring required||ventilators easy to wire up by using star-shaped connections and/or in series|
|Maximum number of ventilators||a max. of 4 fans can be connected to the controller (comfort controller), EASY control has two connections, with on-site wiring up to 6 fans can be connected (cable with min. 3 wires)||unlimited per living unit/level, max. 6 fans per power supply unit (cables with min. 4 wires)|
|Control||Demand-based control possible, with comfort controller||Demand-based control according to local demand possible, with sensors and touch controller|
|Power supply unit||Flush-mounted power supply unit available||Flush-mounted power supply unit and top-hat rail power supply unit available|
|Panels||With plastic design internal panel||With glass design internal panel|
|External cover||With plastic design external cover||Design external cover made of metal in white and stainless steel|
|Benefits||Meets high requirements for energy efficiency and comfort||Meets highest requirements regarding energy efficiency and comfort|
The x-well single-pipe fans A20 and A21 are designed for use in bathrooms, WCs, and all exhaust air spaces and reliably convey used and humid air to the outside. The fans run extremely smoothly and quietly, as they are designed to be run at slow speeds. Thanks to the different versions and configuration options, the x-well single-pipe fans meet all residential building requirements.
Installation situation x-well A20 / A21
The single-pipe fan is designed for decentralised ventilation of single rooms. Thanks to the intelligent design, one fan can be used for many different applications. The EC motors technology used ensures a high efficiency and the lowest acoustic emissions.
The single-pipe fan is designed for decentralised ventilation of single rooms. Can be used for many applications thanks to the wide variety of versions.
Small room fans are designed for decentralised ventilation right through the outter wall of single rooms.
The small room fan is ideal for bathrooms, WCs, kitchens, and every other room – with innovative EC technology.
The small fan is ideal for toilets, bathrooms, and any exhaust air space. With a flow rate of up to 68 m³/h.
The x-well outer wall air vents are a cost-efficient and simple solution for the realisation of ventilation concepts.
The outer air vent is available with a plastic outer hood.
The outer air vent is available as a design variant with internal glass panel.
All technical data for the respective x-well domestic ventilation units
Control of the D12 domestic ventilation is intuitive and easy via LED or touch screen control.
LED control for x-well D12
For controlling several x-well D12 reciprocating fans. The LED control can be integrated in conventional switch systems using an on-site adapter ring.
Touch control for x-well D12
For controlling several x-well D12 reciprocating fans with touch screen. The touch control can be integrated in conventional switch systems using an on-site adapter ring.
Control of the D11 domestic ventilation is intuitive and easy via the comfort control operating panel with an integrated humidity sensor or the Easy control.
Comfort control for x-well D11
For controlling several x-well D11 reciprocating fans with integrated humidity sensor including power supply unit. Connection of max. 4 fans.
Easy control for x-well D11
For controlling several x-well D11 reciprocating fans with power supply unit included. Connection of max. 4 fans.
Finally the new Kermi heating system has been installed. Or the Kermi ventilation system. Nothing left to stop you feeling cosy at home. With our 5-year system warranty, we are happy to prove the quality of our products and our service promise to you.
1. Have the Kermi system installed by a specialist company
2. Have Kermi Customer Service commission the system (or in the case of ventilation systems, a specialist company)
3. Annual servicing by Kermi Customer Service or by a specialist company
The topic of thermal comfort is really quite complicated and some of the terms used often need explaining. That is precisely when I can help you! As a real specialist, I am very familiar with all the system components and the way they work together, so I am able to explain these situations very clearly and in a way that is easy to understand.
Just click the info button to see the appropriate explanation from me. Otherwise I will accompany you in the background along your journey through the world of Kermi and am ready to help if there is anything you need explaining.