NEW DECENTRALISED VENTILATION

THE IDEA AND THE METHODOLOGY OF THE DEVELOPMENT OF NEW DECENTRALISED VENTILATION

We start again from the very beginning.
Every person inside a building needs fresh air. How can we fulfil this individual need all around the world, in all climates, all seasons, in all different types of buildings, with different orientation and sometimes extreme circumstances: varying from traffic noise, sand-, and snowstorms, flies and/or mosquito�s and with extreme high and/or low temperatures?
By using the skin of the building to breath, like insects do. Most office buildings for instance, have large outer wall surfaces that can be used. What we want is a high-tech breathing window!

The shape, dimension and capacity of a breathing window still are unknown.

Vertical position is better for the temperature stratification and to solve the condensation and icing problem in cold climates. The expected personal attitude asks for almost daily contact with users to achieve good indoor air quality and cleaning capacity. �Build in� breathing windows are in upright position easy to mount. With the second generation of the experimental breathing windows, the dimensions are changing slightly.
How this can be achieved and what form this will have is at the moment (April 2004) not entirely known yet.
Optimization of the heat recovering to about 95% seems to be feasible.

Descriptions of the design
What measures, outward appearances and ventilation capacities the breathing window will have is still being investigated. The dimensions of the first generation prototypes are (DxWxH) 180/200/700 mm. [3]. The fine-wire heat exchanger fits easily into a standard dishwasher and therefore can be cleaned easily.
The breathing window functions very well together with natural ventilation, hybrid or completely balanced mechanical ventilation. The CO2 sensor starts automatically, 500 ppm when addition to natural ventilation is needed, but also gives signal when at 1200 ppm (MAC value) doors and windows have to be opened for a healthy indoor climate. It looks as if the fan(s) need to have a capacity of 6 to 7 Watt, resulting in a noise level below 35 dB.

There are three different possibilities of integration in the fa?ade of several types of buildings: as part of transparent glass, as vertical window frame, or the most probable solution, as part of a closed panel or wall in new or even existing buildings.

The larger the vent hole, the lower the air velocity. The noise production decreases, however the wind effects increase in high-rise buildings. When turning on the hood, or putting on the light in the toilet or bathroom, the balanced ventilation gets slightly disturbed and causes the necessary overpressure and resulting extra air supply.