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Thanks again, guys. I had a feeling that there would be at least one =
expert on the list, but it looks like I got two, at least in the first =
couple of hours. And, they both agree! :)
Jack: a differential meter is an interesting idea, especially given the =
cost of the bigger filters. It certainly doesn=E2=80=99t make sense to =
replace them more frequently than necessary. I am not a mechanical =
enginerd, just a plain old ordinary nerd. Still, I like playing around =
with new things. Would something like this work? =
https://www.amazon.com/Manometer-Differential-Backlight-Ventilation-Measur=
ement/dp/B07K7HT3XJ/ref=3Dasc_df_B07K7HT3XJ/?tag=3Dhyprod-20&linkCode=3Ddf=
0&hvadid=3D312099766989&hvpos=3D&hvnetw=3Dg&hvrand=3D20692614293351478&hvp=
one=3D&hvptwo=3D&hvqmt=3D&hvdev=3Dc&hvdvcmdl=3D&hvlocint=3D&hvlocphy=3D900=
4590&hvtargid=3Dpla-622729475514&psc=3D1. I=E2=80=99m thinking of =
drilling a couple of holes in the filter box and semi-permanently =
mounting it.=20
Jim
> On Dec 13, 2021, at 7:21 PM, Jack Brooks <JIBrooks@live.com> wrote:
>=20
> Bingo! Jim hit the nail on the head.=20
> =20
> The 4 inch filter has a lower pressure drop because of overall greater =
filtration area due to all of the deep pleats. It also has a lower =
frequency of filter change out for the same reason. Using two one inch =
filters together will impact your flow. It may not affect your =
performance noticeably, but it will change the system flow, drive up fan =
energy costs, etc. =20
>=20
> https://nordicpure.com/ <https://nordicpure.com/> seems to have a lot =
of sizes in stock and they are not too badly priced either on their =
website or Amazon. I=E2=80=99ve used them for a while and am happy with =
them. They are available in a wide range of MERV ratings too.
> =20
> I have a differential pressure meter across my filter. It registers =
0-0.25 inches of H2O. I let that guide my changeout frequency, which =
often is around a year before the pressure drop indicate to me that it =
should be changed. Ok, yes, I am a Mechanical Enginerd.
>=20
> Jack
> =20
> From: Shop-talk <shop-talk-bounces@autox.team.net> On Behalf Of John =
Innis
> Sent: Monday, December 13, 2021 2:44 PM
> To: Jim Stone <1789alpine@gmail.com>
> Cc: Shop Talk <shop-talk@autox.team.net>
> Subject: Re: [Shop-talk] Furnace Filters
> =20
> 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. =20
> =20
> On Mon, Dec 13, 2021 at 4:20 PM Jim Stone <1789alpine@gmail.com =
> 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 =
filters, 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 filter in there that seemed to work just =
fine. I checked the installation instructions for the 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 are 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 danger of them tipping, but two would make it impossible.
> =20
> Thanks,
> Jim
> _______________________________________________
>=20
> Donate: http://www.team.net/donate.html =
<http://www.team.net/donate.html>
> Suggested annual donation $12.96
> Archive: http://www.team.net/pipermail/shop-talk =
<http://www.team.net/pipermail/shop-talk> http://autox.team.net/archive =
<http://autox.team.net/archive>
>=20
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/shop-talk/jdinnis@gmail.com =
<http://autox.team.net/mailman/options/shop-talk/jdinnis@gmail.com>
>=20
>=20
> --=20
> =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
> =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=3D=3D=3D=3D=3D=3D=3D=3D
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Content-Transfer-Encoding: quoted-printable
charset=utf-8
<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D"">Thanks again, guys. I had a feeling that there would be =
at least one expert on the list, but it looks like I got two, at least =
in the first couple of hours. And, they both agree! :)<div =
class=3D""><br class=3D""></div><div class=3D"">Jack: a differential =
meter is an interesting idea, especially given the cost of the bigger =
filters. It certainly doesn=E2=80=99t make sense to replace them =
more frequently than necessary. I am not a mechanical enginerd, =
just a plain old ordinary nerd. Still, I like playing around with =
new things. Would something like this work? <a =
href=3D"https://www.amazon.com/Manometer-Differential-Backlight-Ventilatio=
n-Measurement/dp/B07K7HT3XJ/ref=3Dasc_df_B07K7HT3XJ/?tag=3Dhyprod-20&l=
inkCode=3Ddf0&hvadid=3D312099766989&hvpos=3D&hvnetw=3Dg&hv=
rand=3D20692614293351478&hvpone=3D&hvptwo=3D&hvqmt=3D&hvde=
v=3Dc&hvdvcmdl=3D&hvlocint=3D&hvlocphy=3D9004590&hvtargid=3D=
pla-622729475514&psc=3D1" =
class=3D"">https://www.amazon.com/Manometer-Differential-Backlight-Ventila=
tion-Measurement/dp/B07K7HT3XJ/ref=3Dasc_df_B07K7HT3XJ/?tag=3Dhyprod-20&am=
p;linkCode=3Ddf0&hvadid=3D312099766989&hvpos=3D&hvnetw=3Dg&=
;hvrand=3D20692614293351478&hvpone=3D&hvptwo=3D&hvqmt=3D&h=
vdev=3Dc&hvdvcmdl=3D&hvlocint=3D&hvlocphy=3D9004590&hvtarg=
id=3Dpla-622729475514&psc=3D1</a>. I=E2=80=99m thinking of drilling =
a couple of holes in the filter box and semi-permanently mounting =
it. </div><div class=3D""><br class=3D""></div><div class=3D"">Jim<br=
class=3D""><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Dec 13, 2021, at 7:21 PM, Jack Brooks <<a =
href=3D"mailto:JIBrooks@live.com"; class=3D"">JIBrooks@live.com</a>> =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><meta =
charset=3D"UTF-8" class=3D""><div class=3D"WordSection1" style=3D"page: =
WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 14px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"><div style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"font-size: 12pt; font-family: =
"Times New Roman", serif; color: rgb(0, 32, 96);" =
class=3D"">Bingo! Jim hit the nail on the head. <o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: "Times New Roman", =
serif; color: rgb(0, 32, 96);" class=3D""><o:p =
class=3D""> </o:p></span></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: "Times New Roman", =
serif; color: rgb(0, 32, 96);" class=3D"">The 4 inch filter has a lower =
pressure drop because of overall greater filtration area due to all of =
the deep pleats. It also has a lower frequency of filter change out for =
the same reason. Using two one inch filters together will impact =
your flow. It may not affect your performance noticeably, but it will =
change the system flow, drive up fan energy costs, etc. <span =
class=3D"Apple-converted-space"> </span><br class=3D""><br =
class=3D""><a href=3D"https://nordicpure.com/"; style=3D"color: blue; =
text-decoration: underline;" class=3D"">https://nordicpure.com/</a><span =
class=3D"Apple-converted-space"> </span>seems to have a lot of =
sizes in stock and they are not too badly priced either on their website =
or Amazon. I=E2=80=99ve used them for a while and am happy with =
them. They are available in a wide range of MERV ratings too.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: "Times New Roman", =
serif; color: rgb(0, 32, 96);" class=3D""><o:p =
class=3D""> </o:p></span></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: "Times New Roman", =
serif; color: rgb(0, 32, 96);" class=3D"">I have a differential pressure =
meter across my filter. It registers 0-0.25 inches of H<sub =
class=3D"">2</sub>O. I let that guide my changeout frequency, =
which often is around a year before the pressure drop indicate to me =
that it should be changed. Ok, yes, I am a Mechanical Enginerd.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: "Times New Roman", =
serif; color: rgb(0, 32, 96);" class=3D""><br class=3D"">Jack<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: "Times New Roman", =
serif; color: rgb(0, 32, 96);" class=3D""><o:p =
class=3D""> </o:p></span></div><div style=3D"border-style: solid =
none none; border-top-width: 1pt; border-top-color: rgb(225, 225, 225); =
padding: 3pt 0in 0in;" class=3D""><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><b =
class=3D"">From:</b><span =
class=3D"Apple-converted-space"> </span>Shop-talk <<a =
href=3D"mailto:shop-talk-bounces@autox.team.net"; =
class=3D"">shop-talk-bounces@autox.team.net</a>><span =
class=3D"Apple-converted-space"> </span><b class=3D"">On Behalf =
Of<span class=3D"Apple-converted-space"> </span></b>John Innis<br =
class=3D""><b class=3D"">Sent:</b><span =
class=3D"Apple-converted-space"> </span>Monday, December 13, 2021 =
2:44 PM<br class=3D""><b class=3D"">To:</b><span =
class=3D"Apple-converted-space"> </span>Jim Stone <<a =
href=3D"mailto:1789alpine@gmail.com"; =
class=3D"">1789alpine@gmail.com</a>><br class=3D""><b =
class=3D"">Cc:</b><span class=3D"Apple-converted-space"> </span>Shop =
Talk <<a href=3D"mailto:shop-talk@autox.team.net"; =
class=3D"">shop-talk@autox.team.net</a>><br class=3D""><b =
class=3D"">Subject:</b><span =
class=3D"Apple-converted-space"> </span>Re: [Shop-talk] Furnace =
Filters<o:p class=3D""></o:p></div></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D""> </o:p></div><div class=3D""><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">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. =
<o:p class=3D""></o:p></div></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D""> </o:p></div><div class=3D""><div class=3D""><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">On Mon, Dec 13, 2021 at 4:20 PM Jim Stone <<a =
href=3D"mailto:1789alpine@gmail.com"; style=3D"color: blue; =
text-decoration: underline;" class=3D"">1789alpine@gmail.com</a>> =
wrote:<o:p class=3D""></o:p></div></div><blockquote style=3D"border-style:=
none none none solid; border-left-width: 1pt; border-left-color: =
rgb(204, 204, 204); padding: 0in 0in 0in 6pt; margin: 5pt 0in 5pt =
4.8pt;" class=3D""><div class=3D""><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">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<b class=3D""><span =
class=3D"Apple-converted-space"> </span>4=E2=80=9D</b><span =
class=3D"Apple-converted-space"> </span>filters, 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<span class=3D"Apple-converted-space"> </span><b =
class=3D"">1=E2=80=9D<span =
class=3D"Apple-converted-space"> </span></b>filter in there that =
seemed to work just fine. I checked the installation instructions =
for the 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 are 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 danger of them tipping, =
but two would make it impossible.<o:p class=3D""></o:p></div><div =
class=3D""><div style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D""> </o:p></div></div><div class=3D""><div style=3D"margin: =
0in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">Thanks,<o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Jim<o:p class=3D""></o:p></div></div></div><p =
class=3D"MsoNormal" style=3D"margin: 0in 0in 12pt; font-size: 11pt; =
font-family: Calibri, =
sans-serif;">_______________________________________________<br =
class=3D""><br class=3D""><a href=3D"mailto:Shop-talk@autox.team.net"; =
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class=3D"Apple-converted-space"> </span><a =
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blue; text-decoration: underline;" =
class=3D"">http://www.team.net/donate.html</a><br class=3D"">Suggested =
annual donation $12.96<br class=3D"">Archive:<span =
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clear=3D"all" class=3D""><br class=3D"">--<span =
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font-size: 11pt; font-family: Calibri, sans-serif;" =
class=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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with substance --- Sam Brown =3D<br =
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Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive
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