The Arctic Air a/c is portable, so it requires no STC, and because it has no condenser, it draws very little juice. Simply set it on an empty seat (use the seat belt for it!), fill it with ice-most FBOs can help you out here-plug it into the cigarette lighter adapter, and away you go. Does it work? According to Sporty's, the high setting will lower the temperature by as much as 35 degrees! Units are available in various sizes and for 12- or 24- volt systems. Along with Sporty's, we'll be giving away the compact model, which should fit nicely into just about any airplane with an open seat.