Subject: Re: [Shop-talk] Heating question (not so much shop related.)

From: Pat Horne <[email-masked]>
Date: Wed, 24 Nov 2021 08:40:13 -0600

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My gut reaction is that it is slightly more efficient to run the system as y=
ou are. Hot air rises, so the downstairs unit heats the upstairs enough for y=
our tastes.  If you run the upstairs unit, it won=E2=80=99t keep the downsta=
irs heat from coming up, so the upstairs unit probably won=E2=80=99t run muc=
h, only the short time when the upstairs temperature is low, which won=E2=80=
=99t be often.=20

A related question is whether not running the upstairs unit is causing any l=
ong term damage to itself by not running.=20

Peace,
Pat

Pat Horne=20
We support Habitat for Humanity

On Nov 24, 2021, at 8:27 AM, [email-masked] wrote:

=EF=BB=BFOK, this is more of a thought experiment, but here is the back stor=
y.  =20

My house is over 200 years old.  2 years ago I got  vinyl siding and better i=
nsulation.  REALLY good insulation.=20
I have programmable thermostats (2 zones, downstairs and upstairs.)=20
I keep them at about 64 degrees when I'm there.=20
Turns out, the batteries in the upstairs one went dead and my upstairs zone h=
asn't turned on in over a year.=20
HOWEVER, I really like how the house is.  The downstairs is as warm as I wan=
t, and the upstairs is just slightly cooler, but it's perfect for sleeping.=20=

My question is, is it more efficient to have the upstairs not run heat?  Or i=
s the downstairs working much harder to compensate?=20

I know there are lots of variables, but what do you guys think?=20

Thanks!=20

Moose_______________________________________________

[email-masked]
Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archi=
ve

[email-masked]

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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">My gut reaction is that it is slightly more=
 efficient to run the system as you are. Hot air rises, so the downstairs un=
it heats the upstairs enough for your tastes. &nbsp;If you run the upstairs u=
nit, it won=E2=80=99t keep the downstairs heat from coming up, so the upstai=
rs unit probably won=E2=80=99t run much, only the short time when the upstai=
rs temperature is low, which won=E2=80=99t be often.&nbsp;<div><br></div><di=
v>A related question is whether not running the upstairs unit is causing any=
 long term damage to itself by not running.&nbsp;<br><br>Peace,</div><div>Pa=
t</div><div><br><div dir=3D"ltr">Pat Horne&nbsp;<div>We support Habitat for H=
umanity</div><div><br></div></div><div dir=3D"ltr"><br>On Nov 24, 2021, at 8=
:27 AM, [email-masked] wrote:<br><br></div><div dir=3D"ltr">=EF=BB=BF<fon=
t size=3D"2" face=3D"sans-serif">OK, this is more of a thought experiment,
but here is the back story. &nbsp;</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">My house is over 200 years old. &nb=
sp;2
years ago I got &nbsp;vinyl siding and better insulation. &nbsp;REALLY
good insulation.</font>
<br><font size=3D"2" face=3D"sans-serif">I have programmable thermostats (2 z=
ones,
downstairs and upstairs.)</font>
<br><font size=3D"2" face=3D"sans-serif">I keep them at about 64 degrees whe=
n
I'm there.</font>
<br><font size=3D"2" face=3D"sans-serif">Turns out, the batteries in the ups=
tairs
one went dead and my upstairs zone hasn't turned on in over a year.</font>
<br><font size=3D"2" face=3D"sans-serif">HOWEVER, I really like how the hous=
e
is. &nbsp;The downstairs is as warm as I want, and the upstairs is just
slightly cooler, but it's perfect for sleeping.</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">My question is, is it more efficien=
t
to have the upstairs not run heat? &nbsp;Or is the downstairs working much
harder to compensate?</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">I know there are lots of variables,=

but what do you guys think?</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">Thanks!</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">Moose</font><span>_________________=
______________________________</span><br><span></span><br><span>Shop-talk@au=
tox.team.net</span><br><span>Donate: http://www.team.net/donate.html</span><=
br><span>Suggested annual donation &nbsp;$12.96</span><br><span>Archive: htt=
p://www.team.net/pipermail/shop-talk http://autox.team.net/archive</span><br=
><span></span><br><span>Unsubscribe/Manage: http://autox.team.net/mailman/op=
tions/shop-talk/[email-masked]</span><br><span></span><br></div></div=
></body></html>=

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_______________________________________________

[email-masked]
Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive

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From: old dirtbeard <[email-masked]>
Date: Wed, 24 Nov 2021 06:44:14 -0800

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Hi Moose,

As you say there are a lot of variables, but I believe that just running
the lower unit will be more efficient:

   1. The heat from the lower floors will tend to rise to the upper floors
   naturally, and the upper floors are acting like additional insulation for
   the furnace. Heating the upper floor directly would have the heat from
   there escape through the roof, while the heat from the bottom furnace
   escapes to the upper floors and then through the roof.
   2. Having one furnace run longer than two furnaces running shorter will
   be more efficient. Furnaces need to heat-up all the duct work when they
   first cycle on. Having one furnace run longer cycles than two
   furnaces running shorter cycles should be more efficient and have less heat
   loss in the ducts.

Disclaimer: I am not a heating contractor and am just speaking on
information for which I am aware.

best,

doug

On Wed, Nov 24, 2021 at 6:26 AM <[email-masked]> wrote:

> OK, this is more of a thought experiment, but here is the back story.
>
> My house is over 200 years old.  2 years ago I got  vinyl siding and
> better insulation.  REALLY good insulation.
> I have programmable thermostats (2 zones, downstairs and upstairs.)
> I keep them at about 64 degrees when I'm there.
> Turns out, the batteries in the upstairs one went dead and my upstairs
> zone hasn't turned on in over a year.
> HOWEVER, I really like how the house is.  The downstairs is as warm as I
> want, and the upstairs is just slightly cooler, but it's perfect for
> sleeping.
>
> My question is, is it more efficient to have the upstairs not run heat?
> Or is the downstairs working much harder to compensate?
>
> I know there are lots of variables, but what do you guys think?
>
> Thanks!
>
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.96
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/shop-talk/[email-masked]
>
>

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<div dir=3D"ltr">Hi Moose,<div><br></div><div>As you say there are a lot of=
 variables, but I believe that just running the lower unit will be more eff=
icient:</div><div><ol><li>The heat from the lower floors will tend to rise =
to the upper floors naturally, and the upper floors are acting like additio=
nal insulation for the furnace. Heating the upper floor directly would have=
 the heat from there escape through the roof,=C2=A0while the heat from the =
bottom furnace escapes to the upper floors and then through the roof.</li><=
li>Having one furnace=C2=A0run longer than two furnaces running shorter wil=
l be more efficient. Furnaces need to heat-up all the duct work when they f=
irst cycle on. Having one furnace run longer cycles than two furnaces=C2=A0=
running shorter cycles should be more efficient=C2=A0and have less heat los=
s in the ducts.</li></ol><div>Disclaimer: I am not a heating=C2=A0contracto=
r and am just speaking on information for which I am aware.</div><div><br><=
/div><div>best,</div></div><div><br></div><div>doug</div></div><br><div cla=
ss=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Nov 24, 20=
21 at 6:26 AM &lt;<a href=3D"mailto:[email-masked]">[email-masked]</a=
>&gt; 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"><fo=
nt size=3D"2" face=3D"sans-serif">OK, this is more of a thought experiment,
but here is the back story. =C2=A0</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">My house is over 200 years old. =
=C2=A02
years ago I got =C2=A0vinyl siding and better insulation.=C2=A0 REALLY
good insulation.</font>
<br><font size=3D"2" face=3D"sans-serif">I have programmable thermostats (2=
 zones,
downstairs and upstairs.)</font>
<br><font size=3D"2" face=3D"sans-serif">I keep them at about 64 degrees wh=
en
I&#39;m there.</font>
<br><font size=3D"2" face=3D"sans-serif">Turns out, the batteries in the up=
stairs
one went dead and my upstairs zone hasn&#39;t turned on in over a year.</fo=
nt>
<br><font size=3D"2" face=3D"sans-serif">HOWEVER, I really like how the hou=
se
is.=C2=A0 The downstairs is as warm as I want, and the upstairs is just
slightly cooler, but it&#39;s perfect for sleeping.</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">My question is, is it more efficie=
nt
to have the upstairs not run heat?=C2=A0 Or is the downstairs working much
harder to compensate?</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">I know there are lots of variables=
,
but what do you guys think?</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">Thanks!</font>
<br>
<br><font size=3D"2" face=3D"sans-serif">Moose</font>______________________=
_________________________<br>
<br>
<a href=3D"mailto:[email-masked]" 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/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.=
team.net/mailman/options/shop-talk/[email-masked]</a><br>
<br>
</blockquote></div>

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