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Effective Air Exchange in your Bus

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January 21, 2021
News blog | Effective Air Exchange in your BusToday, we are showing you the current findings on the importance of air conditioning systems in times of the corona pandemic:

The health and well-being of passengers is the top priority for bus companies and vehicle manufacturers alike. This point gained particular and urgent importance during the current global pandemic Covid-19.

According to current information, a strong air exchange significantly reduces the risk of viruses spreading through the air of the bus cabin. The continuous ventilation and air conditioning systems are therefore currently of particular importance when traveling by bus.

The ventilation and air conditioning systems installed in buses have been continuously developed and now meet the highest technological standards.

Powerful air conditioning systems ensure rapid air exchange, and fresh air continuing to enter the cabin.

European coaches have powerful air conditioning systems with ventilation ducts for a high air through-put, which improves their maximum efficiency with closed doors and windows.

The tempered air with a high proportion of fresh air is blown in from above and transported back out of the vehicle via an efficient exhaust air system. Huge masses of air volumes are moved - up to 7,000 m³ / h in a 12m coach and up to 13,000 m³ / h in a double-decker bus. To illustrate: in a typical single-family house with 150 square meters and a room height of 2.5 m there is 375 m³ of air. The air volume of up to 35 single-family houses glides through a double-decker bus per each operating hour.

These details mean that all of the air in the interior of a European coach is permanently exchanged: in ventilation mode, complete air exchange takes place more frequently than every minute and, at average temperatures, every one to five minutes in cooling mode.

In addition, a manageable number of people in a touring bus are distributed over a comparatively large Cabin: and even with a bus fully seated and occupied by 51 people.

Fresh air is provided

In automatic mode, the air conditioning system always supplies the vehicle-specific maximum possible amount of fresh air in a program-controlled method in order to achieve the best possible level of comfort and energy efficiency.

At temperatures around 23 ° C, the fresh air flap is 100% open on a motorway referenced route in European coaches, with most models remaining between 1% and 15% recirculated air in technical details.

Filters provide additional security

The fresh air taken in from the outside and the proportion of circulating air remaining in cooling mode on hot days are cleaned through highly efficient filters. These filters will sieve out particles from a size of 0.5 micro mile-meters. Droplets containing the virus or dust particles to which it adheres to can thus be captured and filtered away.

All the diagrams and information above are from The Federal Association of German Omnibus Entrepreneurs (bdo) as well as VDL BUs & Coach.

Covid19 - Air Conditioning

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