Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.

Since then I have been monitoring electric usage,
and I, not only don't see a drop in usage, but a few
days I saw an increase.

We live in Houston, and is June and all, but I compare
usage to last year in June, and on average we used
82-83 KW-HR a day then, and we are using 84-86
KW-HR now.

All other usage habits have not changed at all.

Our total living area is about 2100 sq. ft. with walls &
attic being 20+ years old. But these attributes have not
changed for either condensers.

Why going from an old SEER 10 to new 14 SEER does
not provide a little relief from high electric bill?

Outside temperature runs about 92 to 94 with 60% RH.
We keep inside at 76 and I admit the old one couldn't keep
up with 76 and let it rise to 79 to 80 inside, but the new one
keeps up with the setpoint of 76, but runs most of the time
costing us 84-86 KW-HR every day!

Sorry if turned out to be a long post.

Thanks in advance for any type of guidance.

Mike

"ma" wrote in message
...
Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.

Since then I have been monitoring electric usage,
and I, not only don't see a drop in usage, but a few
days I saw an increase.

We live in Houston, and is June and all, but I compare
usage to last year in June, and on average we used
82-83 KW-HR a day then, and we are using 84-86
KW-HR now.

All other usage habits have not changed at all.

Our total living area is about 2100 sq. ft. with walls &
attic being 20+ years old. But these attributes have not
changed for either condensers.

Why going from an old SEER 10 to new 14 SEER does
not provide a little relief from high electric bill?

Outside temperature runs about 92 to 94 with 60% RH.
We keep inside at 76 and I admit the old one couldn't keep
up with 76 and let it rise to 79 to 80 inside, but the new one
keeps up with the setpoint of 76, but runs most of the time
costing us 84-86 KW-HR every day!

Sorry if turned out to be a long post.

Thanks in advance for any type of guidance.

Mike


The new one sounds bigger and may use MORE electricity than the old one.
Set the new one to 80 degrees and compare apples to apples.

ma wrote:

Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.

Since then I have been monitoring electric usage,
and I, not only don't see a drop in usage, but a few
days I saw an increase.

We live in Houston, and is June and all, but I compare
usage to last year in June, and on average we used
82-83 KW-HR a day then, and we are using 84-86
KW-HR now.

All other usage habits have not changed at all.

Our total living area is about 2100 sq. ft. with walls &
attic being 20+ years old. But these attributes have not
changed for either condenser.

Why going from an old SEER 10 to new 14 SEER does
not provide a little relief from high electric bill?

Outside temperature runs about 92 to 94 with 60% RH.
We keep inside at 76 and I admit the old one couldn't keep
up with 76 and let it rise to 79 to 80 inside, but the new one
keeps up with the setpoint of 76, but runs most of the time
costing us 84-86 KW-HR every day!

Sorry if turned out to be a long post.

Thanks in advance for any type of guidance.

Mike


All high SEER claims may not prove to be as claimed. (?)
Was the evaporator a match to the new 14 SEER?
What refrigerant control does it have TXV or piston-flow-rater?
- udarrell
http://www.udarrell.com/air-conditio...tent-heat.html

"ma" wrote in message
...
Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.

Since then I have been monitoring electric usage,
and I, not only don't see a drop in usage, but a few
days I saw an increase.

We live in Houston, and is June and all, but I compare
usage to last year in June, and on average we used
82-83 KW-HR a day then, and we are using 84-86
KW-HR now.

All other usage habits have not changed at all.

Our total living area is about 2100 sq. ft. with walls &
attic being 20+ years old. But these attributes have not
changed for either condensers.

Why going from an old SEER 10 to new 14 SEER does
not provide a little relief from high electric bill?

Outside temperature runs about 92 to 94 with 60% RH.
We keep inside at 76 and I admit the old one couldn't keep
up with 76 and let it rise to 79 to 80 inside, but the new one
keeps up with the setpoint of 76, but runs most of the time
costing us 84-86 KW-HR every day!

Sorry if turned out to be a long post.

Thanks in advance for any type of guidance.

Mike


You may not achieve your rated SEER since you did not replace the inside
evap coil. Even if you do you are going to need to look at the energy bills
for the entire season, that is the S in SEER.

Hopefully one of the HVAC guys will explain this better.


Colbyt

Colbyt wrote:

"ma" wrote in message
.. .


Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.

Since then I have been monitoring electric usage,
and I, not only don't see a drop in usage, but a few
days I saw an increase.

We live in Houston, and is June and all, but I compare
usage to last year in June, and on average we used
82-83 KW-HR a day then, and we are using 84-86
KW-HR now.

All other usage habits have not changed at all.

Our total living area is about 2100 sq. ft. with walls &
attic being 20+ years old. But these attributes have not
changed for either condensers.

Why going from an old SEER 10 to new 14 SEER does
not provide a little relief from high electric bill?

Outside temperature runs about 92 to 94 with 60% RH.
We keep inside at 76 and I admit the old one couldn't keep
up with 76 and let it rise to 79 to 80 inside, but the new one
keeps up with the setpoint of 76, but runs most of the time
costing us 84-86 KW-HR every day!

Sorry if turned out to be a long post.

Thanks in advance for any type of guidance.

Mike




You may not achieve your rated SEER since you did not replace the inside
evap coil. Even if you do you are going to need to look at the energy bills
for the entire season, that is the S in SEER.

Hopefully one of the HVAC guys will explain this better.

Colbyt


No two years' seasons are identical. (SEER the S is Seasonal)
However, you might be able to get a general idea if you kept detailed
records for each month over two or three year periods of time.

If it already had a match-able coil with a TXV refrigerant control, no
changes would be needed.
The probability may not be too great, though.

--

What is the most Affordable Path to the "Human Comfort Zone" Goal?
http://www.udarrell.com/air-conditio...tent-heat.html

ma wrote:
Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.

Since then I have been monitoring electric usage,
and I, not only don't see a drop in usage, but a few
days I saw an increase.

We live in Houston, and is June and all, but I compare
usage to last year in June, and on average we used
82-83 KW-HR a day then, and we are using 84-86
KW-HR now.

All other usage habits have not changed at all.

Our total living area is about 2100 sq. ft. with walls &
attic being 20+ years old. But these attributes have not
changed for either condensers.

Why going from an old SEER 10 to new 14 SEER does
not provide a little relief from high electric bill?

Outside temperature runs about 92 to 94 with 60% RH.
We keep inside at 76 and I admit the old one couldn't keep
up with 76 and let it rise to 79 to 80 inside, but the new one
keeps up with the setpoint of 76, but runs most of the time
costing us 84-86 KW-HR every day!

Sorry if turned out to be a long post.

Thanks in advance for any type of guidance.

Mike

In addition to the comments already made I would like to add that you
have at most two weeks of data. How hot was it during those two weeks as
opposed to the base period? (I believe that is measured in degree cooling
days).




--
Joseph Meehan

Dia duit

On Sun, 12 Jun 2005 19:38:33 GMT, "ma" wrote:

Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.


They get the additional SEER ratings with a combination of the outside
unit and the coil in the attic. Replacing only half and you will be
luck to still get 10 SEER out of it as you now have a mismatched
system. It's kind of like putting a new Honda engine in a '65
Cadillac and then expecting it to get 30mpg... Just not gonna happen.

Steve B.

That's like getting a new engine for your old 70's truck and wondering why
you don't get the mileage of a 05 model.

You oughta replaced the attic unit, and get a TXV coil, too.

--

Christopher A. Young
Learn more about Jesus
www.lds.org
www.mormons.com


"ma" wrote in message
...
Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.

Since then I have been monitoring electric usage,
and I, not only don't see a drop in usage, but a few
days I saw an increase.

We live in Houston, and is June and all, but I compare
usage to last year in June, and on average we used
82-83 KW-HR a day then, and we are using 84-86
KW-HR now.

All other usage habits have not changed at all.

Our total living area is about 2100 sq. ft. with walls &
attic being 20+ years old. But these attributes have not
changed for either condensers.

Why going from an old SEER 10 to new 14 SEER does
not provide a little relief from high electric bill?

Outside temperature runs about 92 to 94 with 60% RH.
We keep inside at 76 and I admit the old one couldn't keep
up with 76 and let it rise to 79 to 80 inside, but the new one
keeps up with the setpoint of 76, but runs most of the time
costing us 84-86 KW-HR every day!

Sorry if turned out to be a long post.

Thanks in advance for any type of guidance.

Mike

I am so overwhelmed by the many replies I received.
Thanks everyone who enlightened me.

After reading all the replies, it sounds acceptable to me.
Evaporator is a 4 ton Carrier, and is about 7 years old.

I guess I need to average out at least one complete
seasonal cycle to compare and make allowance for
old evaporator.

Thanks again. I feel a little relieved of agony.

Mike



"Stormin Mormon" wrote in message
...
That's like getting a new engine for your old 70's truck and wondering why
you don't get the mileage of a 05 model.

You oughta replaced the attic unit, and get a TXV coil, too.

--

Christopher A. Young
Learn more about Jesus
www.lds.org
www.mormons.com


"ma" wrote in message
...
Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.

Since then I have been monitoring electric usage,
and I, not only don't see a drop in usage, but a few
days I saw an increase.

We live in Houston, and is June and all, but I compare
usage to last year in June, and on average we used
82-83 KW-HR a day then, and we are using 84-86
KW-HR now.

All other usage habits have not changed at all.

Our total living area is about 2100 sq. ft. with walls &
attic being 20+ years old. But these attributes have not
changed for either condensers.

Why going from an old SEER 10 to new 14 SEER does
not provide a little relief from high electric bill?

Outside temperature runs about 92 to 94 with 60% RH.
We keep inside at 76 and I admit the old one couldn't keep
up with 76 and let it rise to 79 to 80 inside, but the new one
keeps up with the setpoint of 76, but runs most of the time
costing us 84-86 KW-HR every day!

Sorry if turned out to be a long post.

Thanks in advance for any type of guidance.

Mike

"ma" wrote in message
...
Hello all,
I tried to get an answer by searching Usenet
but I didn't see a matching issue.

About 2 weeks ago we replaced our 20+ year
old 10 SEER, 3.5 ton Carrier condenser with a
Trane 14XLi, 14 SEER 3.5 ton. Didn't change
the attic unit.

Since then I have been monitoring electric usage,
and I, not only don't see a drop in usage, but a few
days I saw an increase.

We live in Houston, and is June and all, but I compare
usage to last year in June, and on average we used
82-83 KW-HR a day then, and we are using 84-86
KW-HR now.

All other usage habits have not changed at all.

Our total living area is about 2100 sq. ft. with walls &
attic being 20+ years old. But these attributes have not
changed for either condensers.

Why going from an old SEER 10 to new 14 SEER does
not provide a little relief from high electric bill?

Outside temperature runs about 92 to 94 with 60% RH.
We keep inside at 76 and I admit the old one couldn't keep
up with 76 and let it rise to 79 to 80 inside, but the new one
keeps up with the setpoint of 76, but runs most of the time
costing us 84-86 KW-HR every day!

Sorry if turned out to be a long post.

Thanks in advance for any type of guidance.

Mike

The specs on a/c's are pretty specific. If you expect the seer rating you
install MATCHED equipment. That means compressor and air handler are
matched to provide the rated performance.
The old 10 SEER air handler has just taken you back to 10 SEER.

If not changing the air handler was your decision, OUCH
Call your contractor and see if there is a upgrade coil that can be
installed in the old air handler cabinet. I have never heard of one but that
does not mean that some one is not making them.

Sorry if this is really negative.

On Mon, 13 Jun 2005 00:52:39 GMT, "Stormin Mormon"
wrote:

That's like getting a new engine for your old 70's truck and wondering why
you don't get the mileage of a 05 model.

So if I take an old stick shift 1/2-ton Chevy truck with a carbureted
350 in it and replace the engine with an LS-1 5.7 L, I shouldn't
expect any gain in performance or fuel economy? Interesting.


You oughta replaced the attic unit, and get a TXV coil, too.

On Mon, 13 Jun 2005 05:08:42 -0700, Wes Stewart
wrote:


So if I take an old stick shift 1/2-ton Chevy truck with a carbureted
350 in it and replace the engine with an LS-1 5.7 L, I shouldn't
expect any gain in performance or fuel economy? Interesting.


No you shouldn't expect much improvement if you replace the engine
(outside compressor unit) and leave the existing 3 speed transmission
(air handler/evaporator). The new four speed overdrive transmission
is where a lot of your savings comes from

Steve B.

On Mon, 13 Jun 2005 18:32:08 GMT, Steve B. wrote:

On Mon, 13 Jun 2005 05:08:42 -0700, Wes Stewart
wrote:


So if I take an old stick shift 1/2-ton Chevy truck with a carbureted
350 in it and replace the engine with an LS-1 5.7 L, I shouldn't
expect any gain in performance or fuel economy? Interesting.


No you shouldn't expect much improvement if you replace the engine
(outside compressor unit) and leave the existing 3 speed transmission
(air handler/evaporator). The new four speed overdrive transmission
is where a lot of your savings comes from

No, the improved BSFC that derives from better fuel metering, reduced
friction, higher combustion efficiency and the lighter weight are
where the improvements come from.