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Hi Jim,
That is basically what I did with our HVAC system when I couldn't get the
4" filters during CV supply craziness. The 4" was supposed to be changed
between 4 and 6 months, so I just bought the 1" filter and changed it each
month. I did use bent wire (like what is used to hold an insulation batt
between joists) to press the 1" filter against the side of the enclosure.
We've since moved, but I did not have any issues with it; in fact, I think
changing the 1" filter more often did a better job balancing filtration and
flow.
Best,
Ian
On Mon, Dec 13, 2021 at 5:20 PM Jim Stone <1789alpine@gmail.com> wrote:
> The company that installed my HVAC system a few years ago used a filter
> box on the return line that takes 20=E2=80=9D x 25" x* 4=E2=80=9D* filter=
s, which is an
> unusual, and thus expensive, size - filters generally run about $25 each =
-
> that is not readily available other than online. During construction, my
> general contractor just had a cheap 20=E2=80=9D x 25" x *1=E2=80=9D *filt=
er in there that
> seemed to work just fine. I checked the installation instructions for th=
e
> furnace and there are no specifications for the filters, other than that
> they need to be changed regularly, which is getting pretty expensive. Is
> there any reason I couldn=E2=80=99t just use 1=E2=80=9D filters, which ar=
e less than half
> the price? Maybe even put two of them in the box, a good one first to
> catch most of the dust and a cheap one like the contractor used as a
> secondary one. It is a snug fit and I don=E2=80=99t think there is any d=
anger of
> them tipping, but two would make it impossible.
>
> Thanks,
> Jim
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>
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<div dir=3D"ltr">Hi Jim,=C2=A0<div>That is basically what I did with our HV=
AC system when I couldn't get the 4" filters during CV supply craz=
iness.=C2=A0 The 4" was supposed to be changed between 4 and 6 months,=
so I just bought the 1" filter and changed it each month.=C2=A0 I did=
use bent wire (like what is used to hold an insulation batt between joists=
) to press the 1" filter against the side of the enclosure.=C2=A0 We&#=
39;ve since moved, but I did not have any issues with it; in fact, I think =
changing the 1" filter more often did a better job balancing filtratio=
n and flow.=C2=A0=C2=A0</div><div><br></div><div>Best,<br>Ian</div></div><b=
r><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, =
Dec 13, 2021 at 5:20 PM Jim Stone <<a href=3D"mailto:1789alpine@gmail.co=
m">1789alpine@gmail.com</a>> wrote:<br></div><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex"><div style=3D"overflow-wrap: break-word;">The compan=
y that installed my HVAC system a few years ago used a filter box on the re=
turn line that takes 20=E2=80=9D x 25" x<b> 4=E2=80=9D</b> filters, wh=
ich is an unusual, and thus expensive, size - filters generally run about $=
25 each - that is not readily available other than online.=C2=A0 During con=
struction, my general contractor just had a=C2=A0cheap 20=E2=80=9D x 25&quo=
t; x <b>1=E2=80=9D </b>filter in there that seemed to work just fine.=C2=A0=
I checked the installation instructions for the furnace and there are no s=
pecifications for the filters, other than that they need to be changed regu=
larly, which is getting pretty expensive.=C2=A0 Is there any reason I could=
n=E2=80=99t just use 1=E2=80=9D filters, which are less than half the price=
?=C2=A0 Maybe even put two of them in the box, a good one first to catch mo=
st of the dust and a cheap one like the contractor used as a secondary one.=
=C2=A0 It is a snug fit and I don=E2=80=99t think there is any danger of th=
em tipping, but two would make it impossible.<div><br></div><div>Thanks,</d=
iv><div>Jim</div></div>_______________________________________________<br>
<br>
<a href=3D"mailto:Shop-talk@autox.team.net"; target=3D"_blank">Shop-talk@aut=
ox.team.net</a><br>
et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/shop-talk"; rel=3D"norefer=
rer" target=3D"_blank">http://www.team.net/pipermail/shop-talk</a> <a href=
=3D"http://autox.team.net/archive"; rel=3D"noreferrer" target=3D"_blank">htt=
p://autox.team.net/archive</a><br>
<br>
alk/shop-talk2@mcfetridge.org" rel=3D"noreferrer" target=3D"_blank">http://=
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<br>
</blockquote></div>
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