I had the doghouse off for other work, and decided to get some heat for my feet. I stole some air from the heat duct to the middle seats of the van. It runs under the cupholder and over the doughouse. For the first trial I just cut a 2"by 3" flap in the side of the duct
it works well keeping your feet warm, but probably takes 90% of the air that would be going to the rear, and it takes longer to warm your feet since the airflow's not directly aimed at your feet. Next I put about 14" of 1 1/2" diameter sump pump poly plastic hose ($9 for 24' from Menards) into the factory duct at the hole I cut and attached it with a plastic rivet through the duct into the hose
top view
I sealed the hose up with duct tape and installed routing the hose to the top of my feet. The rear probably has 60%-70% of its original flow. Which should be fine, but I do have rear heat. There is a strong plastic smell. I'll let it go for little while to see if it goes away. If it doesn't, I'll steal the hose off the drivers knee vent from a junkyard Astro.




At least the van's new owner won't have cold feet.