ISH 2011 in Frankfurt will see Lahr-based Zehnder GmbH, Europe's market leader for comfort ventilation systems featuring heat recovery, present its innovative kitchen ventilation system Zehnder ComfoHood. The system has been developed in close collaboration with V-ZUG AG, Switzerland's renowned mark... More
ISH 2011 in Frankfurt will see Lahr-based Zehnder GmbH, Europe's market leader for comfort ventilation systems featuring heat recovery, present its innovative kitchen ventilation system Zehnder ComfoHood. The system has been developed in close collaboration with V-ZUG AG, Switzerland's renowned market leader in the field of household appliances.
Zehnder ComfoHood is the first ever extractor hood dedicated to the particular needs of kitchen ventilation in today's air-tight, energy-efficient buildings. For the first time, this development will also enable a kitchen extractor hood to be installed in passive houses. Up to now, incorporating a kitchen ventilation system into modern, air-tight residential buildings has always presented a particularly tough challenge when it comes to planning. Conventional extractor hoods only deliver satisfactory performance if enough of the air volume vented out of the kitchen is able to flow back into the building. This has either required the installation of automatic air inlets or meant that the residents have had to open a window while cooking. In both cases, however, the supply air is not only unfiltered, but also cold. If no air inlets have been installed and the residents do not open a window while cooking, the extractor uncontrollably sucks the supply air in through the smoke-filled chimney, unhygienic vertical shafts, dirty openings in the facade or even from the neighbouring residence. Now the new Zehnder ComfoHood kitchen ventilation system has made all these problems a thing of the past. How? The innovative Zehnder ComfoHood system connects the kitchen extractor hood directly to the comfort indoor ventilation system with heat recovery.
This clever trick brings with it a whole host of benefits that everyone involved with the building can profit from in equal measure - from residents to investors, right through to architects and planners. First and foremost, the ComfoHood's direct connection to the central ventilation system means that only a shared extract air duct is required, instead of separate piping for the kitchen ventilation and the comfort ventilation system. Not only does this free up valuable space, but it also lowers investment costs and makes the construction process much simpler. Additionally, the air extracted in the kitchen is fed back into the residential unit in exactly the right quantities using the controlled residence ventilation system, by feeding it in through the supply air channel of the Zehnder indoor ventilation system.
Thanks to the counterflow heat exchanger in the central indoor ventilation device, the air that flows back in is then pre-warmed to a pleasant temperature using an energy-efficient method and is cleaned by the integrated filter sets. Therefore, the heat energy in the extract air from the kitchen is recovered and made available to the building once again. Ultimately, this means that it is possible to operate an extractor hood even in a passive house.
The Zehnder ComfoHood's day-to-day operation is generally extremely pleasant for users thanks to its direct connection to the central ventilation system, as the kitchen extractor hood no longer has its own exhaust fan and is therefore unable to create any more annoying noise. What is more, the even balance of air in the building means that air is no longer sucked in via unhygienic routes or from the neighbouring residence. Not only this, but operating the extractor no longer has a negative effect on any wood-burning stoves installed in the residence or on the chimney. The fresh external air is sucked in at the facade and the combined flow of extract air is exhausted outside. A huge advantage that the Zehnder ComfoHood offers over circulation air systems is that any surplus air humidity and odours are systematically expelled too.
In addition to new buildings, the Zehnder ComfoHood is also particularly well suited to refurbishment projects. The innovative extractor hood is easy to install and connect to the central ventilation system. Thanks to the additional living comfort and potential for energy savings it brings, as well as its low operating costs, the Zehnder ComfoHood will increase the value of any property. With the ComfoHood, Zehnder has completely redefined kitchen ventilation and transformed the previously problematic ventilation zone represented by the kitchen into an energy-efficient comfort zone.