Now that I have replaced the filter on my Carrier WeatherMaker 8000 I need to replace the two panels.. but I forgot. Does the panel with the vents go on the top or bottom?
Signed,
Mr. forgetfull ):

Are they identical in size? If not, there is your clue. If they are, the vented panel does NOT go on the section with the blower. The sections with air movement must be completely sealed.

EPM

Can`t sat that I`ve ever seen a furnace that both doors were exactly the same size,this is done so as the right door only fits where it should go

I have come across a few that were reversed by the homeowner. Guess what? The draft safeguard was tripped and they had no heat. Right on EP.