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Old 08-20-2013, 04:49 PM
 
66 posts, read 101,027 times
Reputation: 82

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Two tips short of replacing the units:
- Make sure your fireplace flue is closed. We made that mistake. It was left open by the previous owners. Our A/C bill was ~$100 lower the next month
- Have someone look at your ductwork. You could have some significant leaks.
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Old 08-20-2013, 05:11 PM
 
Location: Austin, TX
16,688 posts, read 39,304,746 times
Reputation: 9097
The highest my electric bill has been so far this year is $150.

This is for a 2300 sf house, 4 bdrm, 2 adults, but in 2011 I added R-38 insulation in the attic and replaced our old AC system with a SEER 16 in 2007. There are probably more efficient AC units available today.

Upgrade your houses people, they will pay you back in energy costs and comfort levels. We rarely hear outside noises now with all the extra insulation in the attic.
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Old 08-20-2013, 07:06 PM
 
Location: East Dallas
931 posts, read 1,743,834 times
Reputation: 634
I just replaced my 1996 5 ton with a new HVAC System. I cannot for the life of me understand why I waited so long. I do cut down on electric bill by using a window a/c in bedroom My home is 2400 sf with 5 Ton that was 13 Seer and now 17 Seer. I run it at 78 between 9 am and 9 PM and 82 the other 122 hours. My last beill was 297 and the one before that was 140.

Replace and upgrade will cost but it will be much better than what you have now.
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Old 08-21-2013, 10:30 AM
 
Location: Plano
718 posts, read 1,094,405 times
Reputation: 462
Check the duckworks. In our older house , after many issues and repairs we ended up to change the entire unit .......only to find out later that it was a stupid idea since our biggest issue was damaged duckworks. Not one company found the problem ( we had many estimates ) it's only after the new unit was not producing cold air that we were aware of it. It could have been only a $1000 repair but instead we had to spend 6k .
I have found out since that the issue comes quite often , and I'm not talking about cleaning , ours were full of small holes .Companies usually don't even look at it since they only want to sale you a new unit .
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Old 08-22-2013, 05:44 AM
 
284 posts, read 381,065 times
Reputation: 188
We plan to replace one of those units in the spring.... Hoping that will help somewhat! Thanks for all the responses!
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Old 08-22-2013, 07:01 AM
 
Location: Mostly in my head
19,631 posts, read 53,468,042 times
Reputation: 18533
Attic standard for energy efficiency is now R-49.
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Old 09-20-2013, 10:29 PM
 
Location: Dallas, Texas
114 posts, read 146,498 times
Reputation: 108
We used a company to audit our energy usage. They put in a radiant barrier, new insulation and some weird tent contraption for our attic access. It made a rather surprising cut in our summer a/c bills. We also had the a/c company adjust the intake & vents in the master bedroom, as it would heat up too quickly on hot, sunny days. I think they whole project was in the $3000 range or so. It didn't take very long to pay for itself.
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Old 09-23-2013, 01:22 PM
 
32 posts, read 45,851 times
Reputation: 85
We have a 2 story 3500 square foot house with 2 units. Keep it 78 during the day and 74 at night for sleeping. Our highest bill this summer was $180. House was originally built in 1945, but we renovated it in 2007 which included all new insulation, radiant barrier, new windows and brand new high efficiency A/C units. We also have large trees on the property for shade. Before the renovation, we spent one summer there when the house was only about 1500 sq. feet. Our monthly electric bills were $800+ and the house never got below 85 degrees. There's something to be said for increasing the efficiency!
I would seriously consider getting an energy audit done and upgrading your units. $600+/month is awful!
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Old 09-23-2013, 03:10 PM
 
Location: Prosper
6,268 posts, read 12,101,075 times
Reputation: 9325
We finally cracked the $200 barrier for the first time since we bought our home 3 years ago, $206. I posted earlier in the thread, but here it is again, 3600+ sq ft, radiant barrier, high efficiency windows, built in 2005.
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Old 09-23-2013, 03:27 PM
 
1,523 posts, read 842,671 times
Reputation: 716
Quote:
Originally Posted by CasaLindaMom View Post
We have a 2 story 3500 square foot house with 2 units. Keep it 78 during the day and 74 at night for sleeping. Our highest bill this summer was $180. House was originally built in 1945, but we renovated it in 2007 which included all new insulation, radiant barrier, new windows and brand new high efficiency A/C units. We also have large trees on the property for shade. Before the renovation, we spent one summer there when the house was only about 1500 sq. feet. Our monthly electric bills were $800+ and the house never got below 85 degrees. There's something to be said for increasing the efficiency!
I would seriously consider getting an energy audit done and upgrading your units. $600+/month is awful!
So wait, in addition to the energy upgrades, you also added 2000 sq. ft. to the house?
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