coloradotrout wrote:

the real issue is that the 16x25 filter has to be bent to pry into
place. In so doing, I mess up the pleated filter and my theory is
that then the pleats are collapsing during operation and restricting
airflow significantly.

I really want a good filter to filter out some alergens, etc. Using 3m filtrete extra/ultra


Find out what the water column pressure drop is across that filter and
post it here. Pleated filters can drop your airflow considerably.
There should be a simple way to hold that filter down. -D

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