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Where is the filter for the Central AIr?

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Where is the filter for the Central AIr? Sir.M.Messervy 05-12-2008
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Posted by on May 12, 2008, 10:05 am
Hi,
I've been in my house for a year, I looked inside all of the interior
air intakes for my central air system, and none of them seem to have a
filter. I was in the crawl space yesterday and saw what look like used
filters, left by prefvious owner. Do all Central air systems have
filters? If the filters is not in the intakes where are they? The
machinery of central air system is in the crawl space, is the filter
located in this part of the system? Thanks.

Posted by Eric in North TX on May 12, 2008, 10:38 am
On May 12, 9:05 am, Sir.M.Messe...@gmail.com wrote:
> Hi,
> I've been in my house for a year, I looked inside all of the interior
> air intakes for my central air system, and none of them seem to have a
> filter. I was in the crawl space yesterday and saw what look like used
> filters, left by prefvious owner. Do all Central air systems have
> filters? If the filters is not in the intakes where are they? The
> machinery of central air system is in the crawl space, is the filter
> located in this part of the system? Thanks.

Mine is on the intake side of the air handler (squirrel cage fan), but
mine is an a closet in the house. Seem odd
that they would force going to the crawl space to change filters, but
who knows what the installer was thinking.
If you find it there and don't like that, you could always change out
the intake grills to ones that take filters, &
just leave the one in the unit out.

Posted by DerbyDad03 on May 12, 2008, 11:20 am
> On May 12, 9:05 am, Sir.M.Messe...@gmail.com wrote:
>
> > Hi,
> > I've been in my house for a year, I looked inside all of the interior
> > air intakes for my central air system, and none of them seem to have a
> > filter. I was in the crawl space yesterday and saw what look like used
> > filters, left by prefvious owner. Do all Central air systems have
> > filters? If the filters is not in the intakes where are they? The
> > machinery of central air system is in the crawl space, is the filter
> > located in this part of the system? Thanks.
>
> Mine is on the intake side of the air handler (squirrel cage fan), but
> mine is an a closet in the house. Seem odd
> that they would force going to the crawl space to change filters, but
> who knows what the installer was thinking.
> If you find it there and don't like that, you could always change out
> the intake grills to ones that take filters, &
> just leave the one in the unit out.

re: 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.

The OP might want to get an on-site professional opinion before going
down that path.

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.

Posted by Joseph Meehan on May 12, 2008, 2:36 pm


>> On May 12, 9:05 am, Sir.M.Messe...@gmail.com wrote:
>>
...
>
> re: 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.

>
> 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




Posted by DerbyDad03 on May 12, 2008, 3:31 pm
wrote:
>
>
> >> On May 12, 9:05 am, Sir.M.Messe...@gmail.com wrote:
>
> ...
>
> > re: 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....
>
> =A0 =A0 More likely it would reduce the restriction since it would be equi=
valent
> to using a larger filter. =A0Just 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
>
> =A0Dia 's Muire duit


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