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> On Dec 13, 2021, at 16:20, Jim Stone <1789alpine@gmail.com> wrote:
>=20
> =EF=BB=BFThe company that installed my HVAC system a few years ago used a f=
ilter box on the return line that takes 20=E2=80=9D x 25" x 4=E2=80=9D filte=
rs, which is an unusual, and thus expensive, size - filters generally run ab=
out $25 each - that is not readily available other than online.
Is there a reason you aren=E2=80=99t using a washable, reusable filter? Tha=
t=E2=80=99s what four inch housings are for, usually.=20
If you install two 1=E2=80=9D filters, put the cheap on as the prefilter.=20=
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"><br></div><div dir=3D"ltr"=
><br><blockquote type=3D"cite">On Dec 13, 2021, at 16:20, Jim Stone <1789=
alpine@gmail.com> wrote:<br><br></blockquote></div><blockquote type=3D"ci=
te"><div dir=3D"ltr">=EF=BB=BF<meta http-equiv=3D"Content-Type" content=3D"t=
ext/html; charset=3Dutf-8">The company that installed my HVAC system a few y=
ears ago used a filter box on the return line that takes 20=E2=80=9D x 25" x=
<b class=3D""> 4=E2=80=9D</b> filters, which is an unusual, and thus expensi=
ve, size - filters generally run about $25 each - that is not readily availa=
ble other than online. </div></blockquote><div><br></div><div>Is there a rea=
son you aren=E2=80=99t using a washable, reusable filter? That=E2=80=99=
s what four inch housings are for, usually. </div><div><br></div><div>I=
f you install two 1=E2=80=9D filters, put the cheap on as the prefilter.&nbs=
p;</div></body></html>=
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