On May 12, 2:36*pm, "Joseph Meehan"
wrote:
"DerbyDad03" wrote in message

...

On May 12, 10:38 am, Eric in North TX wrote:
On May 12, 9:05 am, wrote:

...

you could always change out the intake grills to ones that take
filters

Replacing the single filter with multiple filters at the intakes could
restrict air flow to the system making it work harder or be less
efficient....

* * More likely it would reduce the restriction since it would be equivalent
to using a larger filter. *Just make sure the original filer is removed and
that any opening at that point is sealed.

What am I missing?

Let's say your system has a 20" x 20" opening (400 square inches) with
a single filter causing some amount of restriction. This restriction
could be measured on a per inch basis, determined by the filter
material.

In this same system, ahead of the single filter, you've got 10
intakes, all measuring 10" x 5" (500 square inches) unrestricted by
a filter.

Now you pull the single 400 square inch filter and replace it with ten
50 square inch filters, each of whom restrict the same amount of air
per square inch.

Haven't you restricted 100 additional square inches of opening - 500
instead of 400?



If you've been there a year and don't know when the system was
inspected last, it might make sense to schedule a check-up. When you
call to make the appointment, tell them you want to talk about
changing the filter layout and that you want to make sure that they
send out a knowledgable service rep.

--
Joseph Meehan

*Dia 's Muire duit