On Jan 21, 8:50*pm, ransley wrote:
On Jan 21, 6:49*pm, Bob wrote:

On 1/21/2010 13:02, ransley wrote:

Cutting a hole for a basement return might do it, I did it.

That may cause problems depending on the proximity to the furnace with
the return air duct drawing in combustion air. *As for the angle iron
idea, this doesn't have to be iron; aluminum may be used. *It only needs
to be strong enough to stop the sheet metal from flexing.

Since when do furnaces need ducted returns, Ive seen no return ducts
many times, just the furnace intake.

In colder cliimates a return plenum is almost always necessary to
circulate ari in rooms far from the furnace. Houses you saw must have
been 40 - 50+ years old.