We have been dealing with the exhaust gas discussion for more than 3 years. Driving bans are threatened or have already been implemented. The drama never ends. While politicians and manufacturers continue to tinker with the symptoms, I am concerned with another topic: How good or bad is the air in the car itself?
A question that doesn't seem to concern anyone. The air pollution for residents of heavily polluted streets is an issue that is not in the interior of vehicles. Neither the media nor politics seem to care what drivers breathe every day. What about the commuters, the pensioners on their way to the shop, the children who are driven to daycare?
Or is it because you mutate from the victim to the culprit, as soon as you turn the ignition key? A strange situation, which gets even more explosive in the upcoming winter months. Then the air pollution in the cities is particularly high. Emissions from heating systems are increasingly coming to traffic, and inversion weather conditions are exacerbating the burden.
Clean air and Saab, that has always been an issue.
Clean air in the Saab - that was the 80s
Anyone who came to the Swedish brand at the time of a Saab 900 or 9000 had solid reasons. Saab addressed many things before the competitor picked them up. A strong argument for driving a Saab was the clean air in the interior. You could experience this impressively in the Saab 900. The air conditioning adjusted the air distribution via negative pressure (!), The fan was always running. This ensured a permanent, slight overpressure in the cabin - i.e. in the interior. Aircraft construction sends its regards.
Interior air filters and overpressure provided clean air in the 80 years. Today's Clean Air concepts of many manufacturers are based on this principle and have been further refined. And Saab too remained true to the concept. As in the 900 I, the ventilation in the 9-3 III can not be switched off completely. A slight overpressure is maintained.
Only today, the values of what we understand by clean air are defined much more rigorously than in the 80 years. The EU limit values for nitrogen dioxide NO2 The annual average is 40 μg / m3 be. These values were exceeded by 2016 at 57% of all traffic-related measuring stations (Source: Wikipedia ), and what it looks like in the interior of vehicles can only be guessed at. Because there are no figures, the automakers are remarkably cautious.
Better air in the interior is not a luxury
A friend pushes me then in summer a copy of the Autobild In the hand. In the 28 / 2018 edition, the editorial board publishes an exhaust gas study, which deals with the NO2 Load in car interiors deals. The result is staggering. On test drives in a vehicle with interior air filter climbs the NO2 Value up to 117 μg / m3 , Motorways and tunnel passages are particularly heavily loaded. There are short-term values of up to 1.000 μg / m3 possible. Very distinctive: The value in the interior is always a lot higher than at the measuring stations of the respective streets in Dusseldorf, where the study was created.
The sobering result: Inmates in the car breathe much worse air than pedestrians on the sidewalks. And nobody cares. Seemingly.
The problem could be solved so easily.
In contrast to the diesel scandal, the non-compliance with limit values, the air pollution from ever larger and heavy vehicles, there is a simple, inexpensive solution for the interior. What was good in the 80s is still good today. An interior air filter with activated carbon reduces the NO2 Load of around 92%. The values drop to 5 - 7 µg / m during measurement runs3, while the values of the outside air depend on the measuring station at 38 - 39 µg / m3 lie.
Activated carbon filters are available for many Saab models
Air filters with activated carbon are installed in many new cars today, but unfortunately not for all brands - and often only for the higher-priced models. Not understandable, because the surcharge from the conventional air filter to the activated carbon variant should be in the cent range in the original equipment.
The good news: There are activated carbon interior air filters for many Saab models. Moving an older car is not automatically a restriction on air quality. The outfitter Mann-Hummel has one Online Catalog the filter lists for several types. Good air quality in the car is not expensive, activated carbon filters cost around € 15,00 - less than a good dinner. Your own health should be worth it.
The air filter for the interior holds 1 year or 15.000 kilometers. Then he loses his effectiveness and should be changed. An exchange is possible on your own or you visit his Saab partner who does it quickly.
Several workshops have recognized the problem and are sensitized. at Saab Service Frankfurt you have discovered the topic long ago. Frankfurt city air is not as clean as it should be, also here 2019 driving bans threaten. In Fechenheim you install, where possible, only biofunctional interior air filters. They not only eliminate pollen and particulate matter but also protect allergy sufferers.
Better air - for little money
Also in my 9-3 is now such a filter for the indoor air to find. The result of this simple measure is amazing. In tunnel passages, like the enclosure of the A3 near Hösbach, I used to press the recirculation button almost automatically. The bad air, resulting from the abrasion of tires and the exhaust of heavy trucks, was hard to bear.
Now the Saab drives through the tunnel, without registering a change in the air quality at all. Small cause, big effect. Even with older vehicles, you can improve the quality of the breath, for little money.