When its warmer outside the car cabin it will feel warmer inside the cars cabin when you stop recirculating air.
When its cooler outside the car cabin than inside mist will develop and thats when recirculating is a bad option
The logic of stopping recirculating is to introduce fresh air into the cabin is good for the passengers health. But then again with prevalent diesel fumes in roads plyed by public transpo, then non-recirculation is an unhealthy option
So stop recirculating air from time to time to introduce fresh air and to control the mist developed in the windshield when the air outside the cars cabin is cooler than inside
My cars recirculation switch is always off in the garage
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