Because its not fresh. Instead of oil try adding nuerofen.
Recirculated air in a car can vary. How the air conditioning is set, how fast the car is going, and whether or not the windows are open can all play a part in this.
Possibly the air is recirculated so the same air goes round and round
No, oxygen itself does not cause headaches. However, breathing in air that is low in oxygen or high in pollutants can sometimes lead to headaches.
All heaters work pretty much the same. Air intake is either from inside ( recirculated ) or from outside ( vent ) Most home heaters do not have a vent option, so they are pretty much taking in recirculated air through a filter.
Yes, bacteria can survive in a recirculated air system. Airborne bacteria can be circulated throughout the system and accumulate in filters or on surfaces, potentially leading to health concerns if not properly managed through regular cleaning and maintenance. UV light, filters, and proper ventilation can help reduce bacterial growth in recirculated air systems.
most have the option of using either fresh or recirculated air
A 2001 Mustang does not have a cabin air filter. The air distribution system of the car uses outside air and recirculated air.
blower motor blows hot or cold air over evaporator
A cold air return is similar to a return air grille, which is needed for air to travel to the furnace to be filtered, heated OR cooled and then recirculated.
the moisture from your breath condenses on the cooler windows make sure you have the ventilation control set to outside air not recirculated air
Ingestion of such fluid would certainly be dangerous enough that any person should see their Doctor.
A Freon leak can cause you headaches and nausea but not cause severe health issues. You should have the leak repaired by a qualified professional as soon as possible.