An in-vehicle fan system for use in a vehicle or home comprises a main body and a fan connected to the main body. The in-vehicle fan system further comprises a shroud arranged over the fan and connected to a first surface of the main body. A filter housing is connected to a second surface of the main body of the in-vehicle fan unit. The in-vehicle fan unit further comprises a first flange extending from or near a first end of the main body and a second flange extending from or near a second end of the main body. The in-vehicle cooling system may allow for the operator of the vehicle to cool the interior of the vehicle without running the engine of the vehicle.