The window over the head of the bed (2nd row passenger) is where all the thermoregulation gathers. Two 12v DC Endless Breeze fans handle intake and exhaust. I twiddle the three power settings on each fan to conjure the flow that suits mood and circumstance. A 12v clip fan provides aim-able and oscillating flow. It's face follows me through van life on hot days. A tarp awning protects the fans and open window from rain. A magnetically fastened no-seeum screen filters insects and adrift nature.