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