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The only real issue is that you will not get as much airflow through a 1"
filter of a given effectiveness. Most of the time that's not a big deal.
In our previous house we did have an issue with the AC freezing up when it
was working really hard. In that case the solution was a lower
effectiveness filter because the box could not accommodate a thicker
filter. If you are happy with the performance of the 1" filter and have
not had any issues, i'd say stick with it. I do NOT recommend stacking two
one inch filters.
On Mon, Dec 13, 2021 at 4:20 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
> _______________________________________________
>
> Shop-talk@autox.team.net
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=3D=3D=3D=3D=3D=3D=3D=3D
=3D Never offend people with style when you =3D
=3D can offend with substance --- Sam Brown =3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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<div dir=3D"ltr">The only real issue is that you will not get as much airfl=
ow through a 1" filter of a given effectiveness.=C2=A0 Most of the tim=
e that's not a big deal.=C2=A0 In our previous house we did have an iss=
ue with the AC freezing up when it was working really hard.=C2=A0 In that c=
ase the solution was a lower effectiveness filter because the box could not=
accommodate a thicker filter.=C2=A0 If you are happy with the performance =
of the 1" filter and have not had any issues, i'd say stick with i=
t.=C2=A0 I do NOT recommend stacking two one inch filters. =C2=A0<br></div>=
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon=
, Dec 13, 2021 at 4:20 PM Jim Stone <<a href=3D"mailto:1789alpine@gmail.=
com">1789alpine@gmail.com</a>> wrote:<br></div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,20=
4,204);padding-left:1ex"><div style=3D"overflow-wrap: break-word;">The comp=
any 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<b> 4=E2=80=9D</b> filters, =
which is an unusual, and thus expensive, size - filters generally run about=
$25 each - that is not readily available other than online.=C2=A0 During c=
onstruction, my general contractor just had a=C2=A0cheap 20=E2=80=9D x 25&q=
uot; 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 n=
o specifications for the filters, other than that they need to be changed r=
egularly, which is getting pretty expensive.=C2=A0 Is there any reason I co=
uldn=E2=80=99t just use 1=E2=80=9D filters, which are less than half the pr=
ice?=C2=A0 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 o=
ne.=C2=A0 It is a snug fit and I don=E2=80=99t think there is any danger of=
them tipping, but two would make it impossible.<div><br></div><div>Thanks,=
</div><div>Jim</div></div>_______________________________________________<b=
r>
<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/jdinnis@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox.te=
am.net/mailman/options/shop-talk/jdinnis@gmail.com</a><br>
<br>
</blockquote></div><br clear=3D"all"><br>-- <br><div dir=3D"ltr" class=3D"g=
mail_signature">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>=3D Never offend people with =
style when you=C2=A0=C2=A0 =3D<br>=3D can offend with substance --- Sam Bro=
wn=C2=A0 =3D<br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
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Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive
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