Caesar Romano wrote:
On Fri, 24 Oct 2008 00:07:54 -0700, "Bob F"
wrote Re is it always better to use a thicker filter in furnace?:


"Caesar Romano" wrote in message

I don't think so, unless you rig the filters in parallel.

Parallel. Exactly. The thicker filter is like two thinner ones
side-by-side.

No, a thicker filter is like to thinner ones in series, one behind the
other.

Incorrect when the thickness is achieved by larger pleats. The actual
filter *material* is the same. Bigger pleats in a thicker filter
"container" means more area and less resistance.