It depends on the desired outcome. I use a dehydrator set at 90F and let it run until the pods are crispy (and may remove thinner-walled pods sooner than thicker-walled pods.) It may take a few days at this temp, depending on general humidity. I dry them this low because at lower temperatures the seeds remain viable and the color is better retained.
If you don't have (and don't want to buy) a dehydrator, you can do them in the oven at the lowest setting, but I recommend propping the door open with a wooden spoon or stick.