My first KA (non convection) range had the exhaust at the left rear corner. Perfect place as the exhaust fan sucked up the hot air from the oven. After one year that oven became possessed (wouldn't turn off and "growled" at me) so Lowes replaced it. I upgraded to a convection oven. It blows hot air out the bottom of the unit! Well just how smart was that!? Not only can the exhaust fan not suck it up out of the house, it makes the cook and the house hotter and if the house is hotter the AC is going to come on more often and use more energy. Not very "green" of them :o And that fan you hear running for so long is due to the convection use...at least it is in my case. Those two things bothered me to no end! I still hate it but I've acclimated. Don't know where you live but during the winter, I keep my oven door open after I turn it off. The fan turns off WAY quicker and the residual heat helps warm the house. Too bad I live in Texas and not North Dakota!
I feel your pain :(
Monica

My parents' Whirlpool double wall oven blows air out the front to cool the control panel. That's pretty much part-and-parcel of the design for units with electronic controls.