Many drivers turn off the car air conditioner to save fuel, but in reality, driving with open windows not only increases fuel consumption but also poses serious risks to health and the vehicle itself. Tests conducted by experts and automobile clubs clearly show this.
Aerodynamics and fuel consumption
With open windows, the car’s aerodynamics are disrupted — turbulence, or inconvenient air currents, form around the body. These currents slow down the vehicle, and the driver has to use more fuel to maintain steady and stable speed. According to studies by Germany’s ADAC club and the “Za Rulem” magazine, even in a compact car like a Skoda Octavia, fuel consumption with the air conditioner running is about 0.43 liters per hour, while losses with open windows can reach up to 0.5 liters/hour. So, it does not save fuel, but actually increases consumption.
If you don’t exceed 90 km/h, the increase in fuel consumption is not significant. But at higher speeds, open windows noticeably reduce efficiency. Therefore, with the air conditioner on and the windows closed, you get not only comfort but also economy.
Using the air conditioner regularly is good for the system
Many drivers consider the air conditioner unnecessary and use it rarely. In fact, regular use keeps the technical system in good condition. The compressor, evaporator, receiver-drier, valve, and other parts of the air conditioner only stay lubricated and airtight while operating. If it is not used for a long time, the oil dries up, and the freon, even if you do not feel it, escapes into the atmosphere, resulting in rust and technical failures.
If the air conditioner is not running, microbes and fungi can multiply inside, causing unpleasant odors and respiratory diseases. Therefore, even in winter, it is advisable to run the air conditioner at least once a week and keep it clean.
Main health risk of open windows
Open windows are a big threat not only to the vehicle but also to human health. Road dust, rubber, soot, small particles, including carcinogens, enter the cabin and negatively affect the respiratory system. Under the sun, these substances become even more toxic.
At the same time, exhaust gases, carbon monoxide, and other chemicals easily enter the cabin, which is thought to be “clean.” Carbon monoxide is tasteless and odorless and can only be detected by symptoms — dizziness, nausea, and other dangerous states.
For this reason, it is recommended to avoid open windows on the road and use the air conditioner and quality cabin filters. Carbon filters block not only dust and gases but also harmful substances at a high level.
Proper ventilation and air purification in the car not only reduce costs but are also the best solution for health and safety. Compared to open windows, using the air conditioner and correct filters can be the best choice for modern drivers. Also, technical service and regular cleaning are the guarantee of a reliable journey! Read 'Zamin' on Telegram!
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