I just purchased a Goodman AEPT36 air handler and I'm having trouble figuring out how to mount it in the vertical posistion. I'm going to install it in the garage. The air outlet is on the top which is no problem but the return is on the bottom under the AH so I have to elevate it some how to connect a return plenum and filter. Do they make a stand for air handlers? Goodman says you can mount these horizontal or vertical but they don't tell how. Horizontal would be easier but I dont have the room for that. When I purchased the unit I was under the impression that the return was on the side at the bottom not directly under the unit or I would have never bought it. Any help on this would be greatly appreciated. I would hate to spend an other $300 to ship it back.