For more than 3 years we have been dealing with the exhaust gas discussion. More and more driving restrictions threaten or have already been implemented. The drama has no end. As politics and manufacturers continue to tinker with the symptoms, another topic concerns me: how good or bad is the air in the car itself?
A question that seems to move no one. The air pollution for residents of heavily polluted roads is an issue that does not exist in the interior of vehicles. Neither the media nor politics seem to care about what motorists inhale on a daily basis. What about the commuters, the renters on the way to shopping, the children who are being driven to the day care center?
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 - these were the 80 years
Those who came to the Swedish brand at the time of a Saab 900 or 9000, had good reasons. Saab addressed many things before the competitor picked them up. A strong argument to drive 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 by negative pressure (!), The fan was always with. This ensured a permanent, slight overpressure in the cabin - ie in the interior. Aircraft construction sends greetings.
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 how it looks in the interior of vehicles, one can only guess. Because there are no numbers, the automakers hold back remarkably.
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 by larger and heavier vehicles, there is a simple, inexpensive solution for the interiors. What was good in the 80 years, that's it still today. An interior air filter with activated carbon reduces the NO2 Burden by around 92%. On test drives the values sink to 5 - 7 μg / m3, while the outdoor air values at 38 - 39 μg / m depending on the measuring station3 lie.
Activated carbon filters are available for many Saab models
In many new cars interior air filters are now used with activated carbon, but unfortunately not in all brands - and often only in the higher priced models. Not comprehensible, because the surcharge from the conventional air filter to activated carbon variant should be in the original equipment in the cent range.
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 for several types lists. A good air quality in the car is not expensive, activated carbon filters cost around the 15,00 € - and 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.