I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

On 14 mar, 16:10, Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

Two 1.5KW elements in serial will split the voltage in two reducing
the power by four so you end up with two 375watt elements.

VD

VirtualDen wrote:
On 14 mar, 16:10, Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at
the hot water heaters.

A friend suggested today that I set the temperatures differentially;
and when I asked why, I realized I had no idea why or to what
advantage two hot water heaters would be set up in serial
connections. (I'd have used one for the teen's bathroom, and
another, in parallel, for the rest of the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

Two 1.5KW elements in serial will split the voltage in two reducing
the power by four so you end up with two 375watt elements.

VD

i would bet the pipes are in serial, not the electrical system. doing it
your way would mean the water would almost never got above warm.

On 14 mar, 16:10, Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Oops I missed the part of your questions below. I would say why would
you want them in serial.

Specifically:
- What's the main advantage (is is simply gallonage?)

Two 1.5KW elements in serial will split the voltage in two reducing
the power by four so you end up with two 375watt elements.

- What is the main benefit?

Two 1500 Kw heater

- What is the key drawbacks?

None

And, most importantly:
- Would you set the temperatures differently on them or the same?

I would reduce both to your convenience. You do not really need this
water to be so hot. If it is not to save energy, it is safer for young
children or old people if an accident would happen.

VD

On 14 mar, 17:24, "chaniarts" wrote:
VirtualDen wrote:
On 14 mar, 16:10, Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at
the hot water heaters.

A friend suggested today that I set the temperatures differentially;
and when I asked why, I realized I had no idea why or to what
advantage two hot water heaters would be set up in serial
connections. (I'd have used one for the teen's bathroom, and
another, in parallel, for the rest of the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

Two 1.5KW elements in serial will split the voltage in two reducing
the power by four so you end up with two 375watt elements.

VD

i would bet the pipes are in serial, not the electrical system. doing it
your way would mean the water would almost never got above warm.

Ok now that would make more sense.

VD

"Aaron FIsher" wrote in message
...
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

More hot water because of the double volume, and faster recovery because you
have double (whatever is heating them)

On 3/14/2011 4:10 PM, Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

Which is it? Series or parallel? Or do you want to go from parallel to
series?

I worked in a restaurant that had 5 gas heaters in series. The last one
in line was hot all the time. When it dropped to a certain temp, it
stayed on and turned on the previous heater so it would be suppling warm
water to the last heater and so on down the line. The owner was a
retired engineer. The purpose was to only heat one tank when that's all
that was needed, and as the need for more hot water rose, the other
heaters kicked on as needed. You could get over 20 gallons of hot water
a minute continuous, never letting the temp fall below... I think it was
150F.

On Mar 14, 4:10*pm, Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

See http://www.chinawinds.co.uk/diy_tips..._parallel.html.

Basically, in series connection, the first one (which gets the cold
water) normally does most of the work. The second one, which normally
gets pre-heated water, does much less work. During periods of low
draw, it may do no work at all, if the inlet water is already at its
set point.

So if they're in series, you might consider reducing the setpoint of
the first one, to balance the workload of the two units, ie, have them
each heat the water by the same number of degrees. That's assuming
there is some advantage to doing so. Presumably the lifetime of the
heating elements (or burners) is basically so many hours of actually
making heat. Offhand I can't see how the lifetime of the tank or the
anodes, would vary by workload. Actually I've never heard of a burner
failing, and elements and anodes are replaceable, so maybe workload
doesn't matter much.

Arguably, keeping one of them at a lower setpoint may reduce standby
losses from it, too.

Chip C
Toronto.

"Aaron FIsher" wrote in message
...
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

Lots of hot water when you need it.

I have only been in one house plumbed that way. It was an older couple who
only turned on the breaker for the first unit in the series when the family
came to visit. They did claim that the tempering factor of bringing the
water into the basement pre-warmed it a little in the winter. That seems
somewhat reasonable to me. The rest of the time the one was just fine for
them.

If I were running both at the same time, all the time, I would set the
first in the series a little lower, as low as fit my needs. The second one
would be set to deliver water at the temp I wanted. I would do this to save
the standby loss on the first unit. Unless you are filling the big tub or
have a large family 50 gallons is adequate for most needs.


--
Colbyt
Please come visit http://www.househomerepair.com

"RBM" wrote in :


"Aaron FIsher" wrote in message
...
I bought a home a few months ago and didn't even think to look at the
hot
water heaters.

A friend suggested today that I set the temperatures differentially;
and when I asked why, I realized I had no idea why or to what
advantage two hot water heaters would be set up in serial
connections. (I'd have used one for the teen's bathroom, and another,
in parallel, for the rest of the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

More hot water because of the double volume, and faster recovery
because you have double (whatever is heating them)




the hot water from #1 heater going into the second heater (in
series)doesn't get heated unless it's temp is lower than what the
thermostat is set at.
and available volume or flow rate doesn't increase,because a tank can only
flow so much water,and that flow has to go thru the 2nd tank.

a parallel connection allows both tanks to add to the water supply(double
flow) and both tanks do the heating.

I doubt a series connection would pass inspection.

--
Jim Yanik
jyanik
at
localnet
dot com

"Jim Yanik" wrote in message
4...
"RBM" wrote in :


"Aaron FIsher" wrote in message
...
I bought a home a few months ago and didn't even think to look at the
hot
water heaters.

A friend suggested today that I set the temperatures differentially;
and when I asked why, I realized I had no idea why or to what
advantage two hot water heaters would be set up in serial
connections. (I'd have used one for the teen's bathroom, and another,
in parallel, for the rest of the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

More hot water because of the double volume, and faster recovery
because you have double (whatever is heating them)




the hot water from #1 heater going into the second heater (in
series)doesn't get heated unless it's temp is lower than what the
thermostat is set at.
and available volume or flow rate doesn't increase,because a tank can only
flow so much water,and that flow has to go thru the 2nd tank.

a parallel connection allows both tanks to add to the water supply(double
flow) and both tanks do the heating.

I doubt a series connection would pass inspection.

--
Jim Yanik
jyanik
at
localnet
dot com


I'm certainly not talking about installing them is series, and neither is
the OP.

"Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?"

Why would you want to heat hot water, it's already hot?

Parallel operation allows for higher GPM flow.

Series operation allows you to balance which one does the
most heating. Not sure there's any advantage to that.

Either operation can be set up to bypass one heater during
replacement of the WH.

The teens shower off WH 1 makes good sense, to me.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Aaron FIsher" wrote in message
...
I bought a home a few months ago and didn't even think to
look at the hot
water heaters.

A friend suggested today that I set the temperatures
differentially; and
when I asked why, I realized I had no idea why or to what
advantage two
hot water heaters would be set up in serial connections.
(I'd have used
one for the teen's bathroom, and another, in parallel, for
the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot
water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the
same?

There are very few such "hacks" that provide any useful
benefit. With the energy efficiency nazis today, the devices
are at max efficiency already.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"VirtualDen"
wrote in message
...

Two 1.5KW elements in serial will split the voltage in two
reducing
the power by four so you end up with two 375watt elements.

VD

"RBM" wrote in :


"Jim Yanik" wrote in message
4...
"RBM" wrote in :


"Aaron FIsher" wrote in message
...
I bought a home a few months ago and didn't even think to look at
the hot
water heaters.

A friend suggested today that I set the temperatures
differentially; and when I asked why, I realized I had no idea why
or to what advantage two hot water heaters would be set up in
serial connections. (I'd have used one for the teen's bathroom, and
another, in parallel, for the rest of the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

More hot water because of the double volume, and faster recovery
because you have double (whatever is heating them)




the hot water from #1 heater going into the second heater (in
series)doesn't get heated unless it's temp is lower than what the
thermostat is set at.
and available volume or flow rate doesn't increase,because a tank can
only flow so much water,and that flow has to go thru the 2nd tank.

a parallel connection allows both tanks to add to the water
supply(double flow) and both tanks do the heating.

I doubt a series connection would pass inspection.

--
Jim Yanik
jyanik
at
localnet
dot com


I'm certainly not talking about installing them is series, and neither
is the OP.

"Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?"




you better REREAD the post;


A friend suggested today that I set the temperatures
differentially; and when I asked why, I realized I had no idea why
or to what advantage two hot water heaters would be set up in
serial connections.


See,it clearly says "serial" connections. that's same as "in series".

--
Jim Yanik
jyanik
at
localnet
dot com

"Jim Yanik" wrote in message
4...
"RBM" wrote in :


"Jim Yanik" wrote in message
4...
"RBM" wrote in :


"Aaron FIsher" wrote in message
...
I bought a home a few months ago and didn't even think to look at
the hot
water heaters.

A friend suggested today that I set the temperatures
differentially; and when I asked why, I realized I had no idea why
or to what advantage two hot water heaters would be set up in
serial connections. (I'd have used one for the teen's bathroom, and
another, in parallel, for the rest of the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

More hot water because of the double volume, and faster recovery
because you have double (whatever is heating them)




the hot water from #1 heater going into the second heater (in
series)doesn't get heated unless it's temp is lower than what the
thermostat is set at.
and available volume or flow rate doesn't increase,because a tank can
only flow so much water,and that flow has to go thru the 2nd tank.

a parallel connection allows both tanks to add to the water
supply(double flow) and both tanks do the heating.

I doubt a series connection would pass inspection.

--
Jim Yanik
jyanik
at
localnet
dot com


I'm certainly not talking about installing them is series, and neither
is the OP.

"Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?"




you better REREAD the post;


A friend suggested today that I set the temperatures
differentially; and when I asked why, I realized I had no idea why
or to what advantage two hot water heaters would be set up in
serial connections.


See,it clearly says "serial" connections. that's same as "in series".

--
Jim Yanik
jyanik
at
localnet
dot com

I don't know what a serial connection is, but here is the op's quote .
"Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?"

On Mon, 14 Mar 2011 17:06:33 -0500, Jim Yanik
wrote:

"RBM" wrote in :


"Aaron FIsher" wrote in message
...
I bought a home a few months ago and didn't even think to look at the
hot
water heaters.

A friend suggested today that I set the temperatures differentially;
and when I asked why, I realized I had no idea why or to what
advantage two hot water heaters would be set up in serial
connections. (I'd have used one for the teen's bathroom, and another,
in parallel, for the rest of the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

More hot water because of the double volume, and faster recovery
because you have double (whatever is heating them)




the hot water from #1 heater going into the second heater (in
series)doesn't get heated unless it's temp is lower than what the
thermostat is set at.
and available volume or flow rate doesn't increase,because a tank can only
flow so much water,and that flow has to go thru the 2nd tank.

a parallel connection allows both tanks to add to the water supply(double
flow) and both tanks do the heating.

I doubt a series connection would pass inspection.
It is not that uncommon, so MUST pass inspection. It uses the same
theory as the dual element electric water heater, where the bottom
element heats the cold water that comes from the mains or well, and
the top element heats the warmed water. It will more than double the
amount of hot water available.

On Mon, 14 Mar 2011 18:49:47 -0400, "Stormin Mormon"
wrote:

Why would you want to heat hot water, it's already hot?

Parallel operation allows for higher GPM flow.

Series operation allows you to balance which one does the
most heating. Not sure there's any advantage to that.

Either operation can be set up to bypass one heater during
replacement of the WH.

The teens shower off WH 1 makes good sense, to me.
Even with series connection you can run kids shower off the first
one and dishwasher off the second, etc. The first one heats to a
preset safe temperature, and the second heats to a higher temperature,
using only as much power as is required to raise the temperature that
amount - and can deliver a whole lot of hot water without any
significant drop in temperature.

That's what I thought, but went back and looked. The fellow
with the teens HW tap, figured two WH to serve different
parts of the house. I think the teens shower off WH1, out of
two, makes great sense.

With that set up, parents filling a tub might leave the
teens with less hot water. Maybe not, though. The parents HW
would have to be tempered with a lot of cold, so maybe
that's less an issue.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..



wrote in message
...

Even with series connection you can run kids shower off
the first
one and dishwasher off the second, etc. The first one heats
to a
preset safe temperature, and the second heats to a higher
temperature,
using only as much power as is required to raise the
temperature that
amount - and can deliver a whole lot of hot water without
any
significant drop in temperature.

"RBM" wrote in :


"Jim Yanik" wrote in message
4...
"RBM" wrote in :


"Jim Yanik" wrote in message
4...
"RBM" wrote in :


"Aaron FIsher" wrote in message
...
I bought a home a few months ago and didn't even think to look at
the hot
water heaters.

A friend suggested today that I set the temperatures
differentially; and when I asked why, I realized I had no idea why
or to what advantage two hot water heaters would be set up in
serial connections. (I'd have used one for the teen's bathroom, and
another, in parallel, for the rest of the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

More hot water because of the double volume, and faster recovery
because you have double (whatever is heating them)




the hot water from #1 heater going into the second heater (in
series)doesn't get heated unless it's temp is lower than what the
thermostat is set at.
and available volume or flow rate doesn't increase,because a tank can
only flow so much water,and that flow has to go thru the 2nd tank.

a parallel connection allows both tanks to add to the water
supply(double flow) and both tanks do the heating.

I doubt a series connection would pass inspection.

--
Jim Yanik
jyanik
at
localnet
dot com


I'm certainly not talking about installing them is series, and neither
is the OP.

"Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?"




you better REREAD the post;


A friend suggested today that I set the temperatures
differentially; and when I asked why, I realized I had no idea why
or to what advantage two hot water heaters would be set up in
serial connections.


See,it clearly says "serial" connections. that's same as "in series".

--
Jim Yanik
jyanik
at
localnet
dot com

I don't know what a serial connection is, but here is the op's quote .
"Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?"




And I explained why.
Along with why a serial connection is not used.

If you don't know what a serial connection is,how can you comment on a
parallel connection?
you don't know the difference,if you don't know what a serial connection
is.

--
Jim Yanik
jyanik
at
localnet
dot com

On Mon, 14 Mar 2011 20:45:22 -0400, wrote:


Even with series connection you can run kids shower off the first
one and dishwasher off the second, etc. The first one heats to a
preset safe temperature, and the second heats to a higher temperature,
using only as much power as is required to raise the temperature that
amount - and can deliver a whole lot of hot water without any
significant drop in temperature.

What temp do you all keep your hot water at.

I like that mine is not hot enough to burn me, but it would probably
wash the dishes better if it were hotter, and it would be easier to
get the bathtub warm when it cooled off or I made it too cold.

So what temp do you all use?????????

Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at the
hot water heaters.

A friend suggested today that I set the temperatures differentially;
and when I asked why, I realized I had no idea why or to what
advantage two hot water heaters would be set up in serial
connections. (I'd have used one for the teen's bathroom, and another,
in parallel, for the rest of the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water
heaters in parallel?

You ask about in series, then in parrallel. What do you really want?

One house I know has 2 in series to allow them to fill the huge spa with hot
enough water.

"Stormin Mormon" wrote in message
...

There are very few such "hacks" that provide any useful
benefit. With the energy efficiency nazis today, the devices
are at max efficiency already.

How horrible for us all, what will those sadistic fascists think of next.

In article ,
mm wrote:

What temp do you all keep your hot water at.

I like that mine is not hot enough to burn me, but it would probably
wash the dishes better if it were hotter, and it would be easier to
get the bathtub warm when it cooled off or I made it too cold.

So what temp do you all use?????????

We just had this discussion last week. 140F.

On Tue, 15 Mar 2011 00:25:28 -0700, Smitty Two
wrote:

In article ,
mm wrote:

What temp do you all keep your hot water at.

I like that mine is not hot enough to burn me, but it would probably
wash the dishes better if it were hotter, and it would be easier to
get the bathtub warm when it cooled off or I made it too cold.

So what temp do you all use?????????

We just had this discussion last week. 140F.

I missed it, I think. I think 140 is what the seller of the house
told me. I have to find my thermometer.

Thanks.

Next, they will limit the characters typed in usenet posts,
to conserve the energy needed to transmit such messages.
Acronyms will be strictly enforced.

The exchange that formerly had a cascade, flame war, and bad
attitude. Will now be:

MDFO
SBO
DFT
CBLCBW

(My dick fell off!; Solder it back on.; Don't feed the
trolls.; C'mon, boys, lets conserve band width.)

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"DGDevin" wrote in message
m...

How horrible for us all, what will those sadistic fascists
think of next.

And six weeks later, someone to ask again how to change a
light bulb.



Q: How many people does it take to change a light bulb in
cyberspace?
Answer: 1331
-1 to successfully change the light bulb and to post to the
mail list that the light bulb has been changed
-14 to share similar experiences of changing light bulbs and
how the light bulb could have been changed differently.
-7 to caution about the dangers of changing light bulbs.
-27 to point out spelling/grammar errors in posts about
changing light bulbs.
-53 to flame the spell checkers
-156 to write to the list administrator complaining about
the light bulb discussion and its inappropriateness to this
mail list.
-41 to correct spelling in the spelling/grammar flames.
-109 to post that this list is not about light bulbs and to
please take this email exchange to alt.lite.bulb
-203 to demand that cross posting to alt.grammar,
alt.spelling and alt.punctuation about changing light bulbs
be stopped.
-111 to defend the posting to this list saying that we are
all using light
-bulbs and therefore the posts **are** relevant to this mail
list.
-306 to debate which method of changing light bulbs is
superior, where to buy the best light bulbs, what brand of
light bulbs work best for this technique, and what brands
are faulty.
-27 to post URLs where one can see examples of different
light bulbs
-14 to post that the URLs were posted incorrectly, and to
post corrected URLs.
-3 to post about links they found from the URLs that are
relevant to this list which makes light bulbs relevant to
this list.
-33 to concatenate all posts to date, then quote them
including all headers and footers, and then add "Me Too."
-12 to post to the list that they are unsubscribing because
they cannot handle the lightbulb controversy.
-19 to quote the "Me Too's" to say, "Me Three."
-4 to suggest that posters request the light bulb FAQ.
-1 to propose new alt.change.lite.bulb newsgroup.
-47 to say this is just what alt.physic.cold_fusion was
meant for, leave it here.
-143 votes for a new list alt.lite.bulb.
-38 votes proclaiming the advantages in using vintage
lightbulbs


--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Smitty Two" wrote in message
news

So what temp do you all use?????????

We just had this discussion last week. 140F.

On Mar 14, 4:10*pm, Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

There are different options. In series if you set them the same you
will have lots of hot water. Downside is that the 2nd one won't
actually run a lot and you will have the maximum costs to maintain the
water at the set temp. Set the first one a little lower than the
second. This gives you really rapid recovery if you use the entire
first tank. Also evens out the running time and reduces the maintain
temp costs. But this will redcue the amount of hw you can draw in a
single go. Parallel doesn't really work well as you can not even the
draw. Parallel works better if you dedicate each tank to specific
fixtures and appliances. The most common is to have a second tank
dedicated to a master bath that has a large tub or spa. Also insures
that you (the master) have hw when the kids use all theirs up.

On 3/15/2011 1:23 AM, mm wrote:
On Mon, 14 Mar 2011 20:45:22 -0400, wrote:


Even with series connection you can run kids shower off the first
one and dishwasher off the second, etc. The first one heats to a
preset safe temperature, and the second heats to a higher temperature,
using only as much power as is required to raise the temperature that
amount - and can deliver a whole lot of hot water without any
significant drop in temperature.

What temp do you all keep your hot water at.

I like that mine is not hot enough to burn me, but it would probably
wash the dishes better if it were hotter, and it would be easier to
get the bathtub warm when it cooled off or I made it too cold.

So what temp do you all use?????????

Mine's about 145. Use less hot water the hotter it is. duh.

--
Steve Barker
remove the "not" from my address to email

I've never seen water heaters plumbed in series except for solar,
where the first tank is hooked to the solar panels and preheats the
water going into the second tank.

If somebody does plumb two regular heaters in series, is it best to
have the first tank set at a lower temperature so it won't leak as
much heat?

On Mar 14, 3:10*pm, Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?

One will be more efficient if its Ng since the main heat loss is up
the chimney, the uninsulated center. Research EF ratings, Energy
Factor is the accepted rating for a water heaters efficency , Most ng
WH are only 65% efficent. They range from 55- about 86 EF for tanks.
82-96 for tankless.

On Mar 14, 5:51*pm, "Stormin Mormon"
wrote:
There are very few such "hacks" that provide any useful
benefit. With the energy efficiency nazis today, the devices
are at max efficiency already.

--
Christopher A. Young
Learn more about Jesus
*www.lds.org
.

"VirtualDen"
wrote in ...

Two 1.5KW elements in serial will split the voltage in two
reducing
the power by four so you end up with two 375watt elements.

VD

65% 65EF for the average Ng tank is not efficient, if they had auto
flue dampers on top then you might be 75-80% .

On 15 mar, 09:05, "Stormin Mormon"
wrote:
And six weeks later, someone to ask again how to change a
light bulb.

Q: How many people does it take to change a light bulb in
cyberspace?
Answer: 1331

Wrong answer, it is not 1331 it is 1333. You forgot about you whining
about it and me replying to you. ;oP

VD

According to the rules I'm required by protocol to flame
you. You're an impolite gentleman. Oh, sorry. That required
several exclaimation points. To be enclosed under separate
cover.
[!!!!!!]

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"VirtualDen" wrote in message
...
On 15 mar, 09:05, "Stormin Mormon"
wrote:
And six weeks later, someone to ask again how to change a
light bulb.

Q: How many people does it take to change a light bulb in
cyberspace?
Answer: 1331

Wrong answer, it is not 1331 it is 1333. You forgot about
you whining
about it and me replying to you. ;oP

VD

Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?
One heater has less radiation loss than two. Volume goes up faster
than surface area.
If, by parallel, you mean split load, that's more about rationing hot water.
Serial has more hot pipe to lose heat. If you tap off in the center,
it gets more complicated.
For long runs, you're still heating the water in the middle.
Closer spigot means you get it faster, but for serial you're depleting
both reservoirs.
Typical electric water heater has two elements, but only one on
at a time. No reason you couldn't run both elements if you had
enough electricity available.
BTUs are BTUs. The amount of water you can heat is independent
of how many heating elements or tanks you have. It's all about
the total electrical input.
How much hot water you can have NOW is a function of total tank size.

On Tue, 15 Mar 2011 03:33:27 -0400, mm
wrote:

On Tue, 15 Mar 2011 00:25:28 -0700, Smitty Two
wrote:

In article ,
mm wrote:

What temp do you all keep your hot water at.

I like that mine is not hot enough to burn me, but it would probably
wash the dishes better if it were hotter, and it would be easier to
get the bathtub warm when it cooled off or I made it too cold.

So what temp do you all use?????????

We just had this discussion last week. 140F.

I missed it, I think. I think 140 is what the seller of the house
told me. I have to find my thermometer.

Thanks.
I like mine at 145 minimum.

On Tue, 15 Mar 2011 13:51:41 -0700, mike wrote:

Aaron FIsher wrote:
I bought a home a few months ago and didn't even think to look at the hot
water heaters.

A friend suggested today that I set the temperatures differentially; and
when I asked why, I realized I had no idea why or to what advantage two
hot water heaters would be set up in serial connections. (I'd have used
one for the teen's bathroom, and another, in parallel, for the rest of
the house.)

Anyway, what's the THEORY and RATIONALE for having two hot water heaters
in parallel?

Specifically:
- What's the main advantage (is is simply gallonage?)
- What is the main benefit?
- What is the key drawbacks?
And, most importantly:
- Would you set the temperatures differently on them or the same?
One heater has less radiation loss than two. Volume goes up faster
than surface area.
If, by parallel, you mean split load, that's more about rationing hot water.
Serial has more hot pipe to lose heat. If you tap off in the center,
it gets more complicated.
For long runs, you're still heating the water in the middle.
Closer spigot means you get it faster, but for serial you're depleting
both reservoirs.
Typical electric water heater has two elements, but only one on
at a time. No reason you couldn't run both elements if you had
enough electricity available.
BTUs are BTUs. The amount of water you can heat is independent
of how many heating elements or tanks you have. It's all about
the total electrical input.
How much hot water you can have NOW is a function of total tank size.
The most common application of series connected water heaters is a 5
gallon unit at point of use to provide hot water instantly, connected
after the 40 gallon or whatever "main" heater which might be at the
other end of the house. This saves water as you do not need to run the
water through the pipes to get hot water, and you don't need a high
powered heater at point of use, like the useless tankless systems.

On Tue, 15 Mar 2011 17:25:01 -0400, wrote:

On Tue, 15 Mar 2011 03:33:27 -0400, mm
wrote:

On Tue, 15 Mar 2011 00:25:28 -0700, Smitty Two
wrote:

In article ,
mm wrote:

What temp do you all keep your hot water at.

I like that mine is not hot enough to burn me, but it would probably
wash the dishes better if it were hotter, and it would be easier to
get the bathtub warm when it cooled off or I made it too cold.

So what temp do you all use?????????

We just had this discussion last week. 140F.

I missed it, I think. I think 140 is what the seller of the house
told me. I have to find my thermometer.

Thanks.
I like mine at 145 minimum.

Thanks. I'll try that too.

Old electric water heater had a hole in it to adjust the temp. New
one has a solid metal plate and underneath that a biece of styrofoam
filling the space. Have to remove both. A real pain, but I guess it
saves heat.

On Tue, 15 Mar 2011 09:54:19 -0500, Steve Barker
wrote:

On 3/15/2011 1:23 AM, mm wrote:
On Mon, 14 Mar 2011 20:45:22 -0400, wrote:


Even with series connection you can run kids shower off the first
one and dishwasher off the second, etc. The first one heats to a
preset safe temperature, and the second heats to a higher temperature,
using only as much power as is required to raise the temperature that
amount - and can deliver a whole lot of hot water without any
significant drop in temperature.

What temp do you all keep your hot water at.

I like that mine is not hot enough to burn me, but it would probably
wash the dishes better if it were hotter, and it would be easier to
get the bathtub warm when it cooled off or I made it too cold.

So what temp do you all use?????????

Mine's about 145. Use less hot water the hotter it is. duh.

I thought I posted alreay. I'll try 145 also. Thanks.

On Tue, 15 Mar 2011 17:45:55 -0400, clare wrote:
The most common application of series connected water heaters is a 5
gallon unit at point of use to provide hot water instantly, connected
after the 40 gallon or whatever "main" heater which might be at the
other end of the house.

I should have mentioned both water heaters are gas fired and 50 gallons
and they're both right next to each other (practically touching).

The hot output of one heater goes into the cold input of the other.

There is a hot-water recirculating pump on the output also that allows
any of the five bathrooms in the house to have hot water within ten or
fifteen seconds.

I will read all that is written here until I understand what the design
goal was in the first place (and what then to set each temperature at).

On Tue, 15 Mar 2011 09:23:12 -0700, ransley wrote:
One will be more efficient if its Ng

They both are fired off the same propane tank (not natural gas).