Basement framing assistance

Hi,

I am finishing my basement so I would like to create a separate room for my hot water heater and furnace. I plan on installing some passive vents and a louvered door so the furnace get's it ventilation.

The back is already framed, sides aren't much of a concern, but the front is where I need help. I'm thinking the front wall will be about a foot in front of the water heater and parallel the entire length. I would like to install the door in between the water heater and the furnace.

Looking at the duct work above etc...how could I frame this front wall and make it sturdy?

http://s262.photobucket.com/albums/ii106/jepuskar/Basement/

Thanks,

D.I.