Abstract: A heat transfer device for transferring heat from the passenger compartment of a vehicle to the ambient air outside the vehicle is provided comprising a sealed tube having a proximal end in fluid communication with a distal end, a chamber extending from the proximal end to the distal end, a heat transport fluid and an internal structure configured to allow the heat transport fluid to pass from the distal end to the proximal end. A method of determining an optimal structure of such a heat transfer device is also provided. comprising determining an amount of heat to remove from the vehicle determining an appropriate heat transfer fluid, configuring the internal structure of the at least one sealed tube for maximizing transport of the appropriate heat transport fluid, and determining an optimal number and optimal dimensions of the at least one sealed tube for maximizing heat transfer.