DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   HVAC (http://www.diychatroom.com/f17/)
-   -   13 seer vs 14.5 seer (http://www.diychatroom.com/f17/13-seer-vs-14-5-seer-52750/)

texczech 09-10-2009 04:41 PM

13 seer vs 14.5 seer
 
I need to replace my 19 year old heat pump system... I can get an eco temp 13 seer system or a tempstar 14.5 seer system... the eco temp is about 1500 cheaper than the tempstar... How do you figure the return for spending more for a more efficent system than the other? thanks!

beenthere 09-10-2009 05:04 PM

Might want to look at differences in warranty before looking to see if it has a ROI in energy cost.

Do both use on demand defrost?
Do both have accumilators?
Do both have high and low pressure switches to protect the compressor?

SKIP4661 09-10-2009 05:10 PM

May also want to make sure they both have R-410 refrigerant as R-22 is being phased out.

Joe F 09-11-2009 07:53 AM

Where do you live? The 1.5 SEER difference will have a much longer payback time in Ohio than it will in Florida.

Yoyizit 09-11-2009 09:07 AM

Quote:

Originally Posted by texczech (Post 326196)
I need to replace my 19 year old heat pump system... I can get an eco temp 13 seer system or a tempstar 14.5 seer system... the eco temp is about 1500 cheaper than the tempstar... How do you figure the return for spending more for a more efficent system than the other? thanks!

If you spend $100/mon on your 13 you'll spend $100(13/14.5) = $90 on your 14.5 so the breakeven point would be $1500/($100-$90) = 150 months = ~13 years.

Is your reason for replacement in this list?

Don't want to sink more money into a lemon
Don't want to sink more money into a non-lemon
Can't get parts
Wants a more energy-efficient unit
Wants more comfort or less discomfort
It's leaking
It doesn't work
Not sized correctly
Size of family or structure changed
smells bad
gives me headaches (CO)

YOURHANDYMAN 09-11-2009 10:13 AM

[quote=Yoyizit;326424]If you spend $100/mon on your 13 you'll spend $100(13/14.5) = $90 on your 14.5 so the breakeven point would be $1500/($100-$90) = 150 months = ~13 years.]


hmmm i dont know of any where in the usa that you would use the a/c more than about 6 months out of the year so you have to at least double the payback time and then there is opportunity cost. If you take the fifteen hundred and invested it for a modest 7 % you would make up for the efficency improvement

beenthere 09-11-2009 12:06 PM

Parts of Texas, Florida, and I believe Arizona.

Yoyizit 09-11-2009 03:14 PM

Quote:

Originally Posted by YOURHANDYMAN (Post 326451)
so you have to at least double the payback time

If you take the fifteen hundred and invested it for a modest 7 % you would make up for the efficency improvement

http://www.eia.doe.gov/aer/txt/ptb0110.html
1240 cooling degree days/year seems to be an average value for the continental US
and
http://www.eia.doe.gov/neic/infosheets/degreedays.html
~3573 HDD [per 7 months?]

Plus, for reasons I don't understand, many people see no improvement in their utility bills when going to higher efficiency units, sometimes even with considerably higher efficiency units.

texczech 09-11-2009 04:00 PM

My old unit is going bad & I need a new one is the reason I am getting a new one. We live in SouthCentral Texas and AC is definitely way more important than heating...

Yoyizit 09-11-2009 04:10 PM

Quote:

Originally Posted by texczech (Post 326583)
We live in SouthCentral Texas and AC is definitely way more important than heating...

Yes. I was a 'guest' of the USAF in San Antonio.

But with the dry air a lot of people used evap. coolers.

YOURHANDYMAN 09-18-2009 11:33 PM

Quote:

Originally Posted by beenthere (Post 326480)
Parts of Texas, Florida, and I believe Arizona.

funny you mentioned those 3 states. I have lived in all 3. I currently live in Phx AZ which is not the hottest part of AZ but I think it rates in the top 5 , and i don't turn on my ac unit until the first or 2nd week in June and it goes off about October 15 - November 1st that is 5.5-6 months . i was in Florida visiting family in July and I had to turn of the ac unit cuz it was too cold and I slept without ac. I have lived in Houston and near San Antonio and again I found that not more than 6 month of ac was need.

I dont know if i put it in the previous post but I discussed it with SRP my local electric provider about 12 vs higher seer ratings and they told me that you could never recover the cost of anything over 12.

YOURHANDYMAN 09-19-2009 12:20 AM

Quote:

Originally Posted by Yoyizit (Post 326566)
http://www.eia.doe.gov/aer/txt/ptb0110.html
1240 cooling degree days/year seems to be an average value for the continental US
and
http://www.eia.doe.gov/neic/infosheets/degreedays.html
~3573 HDD [per 7 months?]

Plus, for reasons I don't understand, many people see no improvement in their utility bills when going to higher efficiency units, sometimes even with considerably higher efficiency units.

wow that chart made no sense. One problem is that it is based on 65 degrees and at that temperature i am more likely to turn the heat on. and i would not turn on the ac until the temperature is over 85 or even 90. turn on a fan yes ... ac no. Another thing you should consider is -does your electric company offer time of use-

but i think one option would be to ad more insulation with the 1500 but i guess that depends on how well your house is insulated.

beenthere 09-19-2009 05:17 AM

Quote:

Originally Posted by YOURHANDYMAN (Post 329518)

I dont know if i put it in the previous post but I discussed it with SRP my local electric provider about 12 vs higher seer ratings and they told me that you could never recover the cost of anything over 12.

You should have asked them where you could get a new 12 SEER, since 12 SEERs aren't allowed to be made anymore.

Now if you had used a temp setting of say 74F, when you lined in those places. Would you have used A/C for a longer time period. making the cooling season 7 moths or more.

Home Air Direct 09-19-2009 08:45 AM

Just from a SEER vs Equipment Cost, here is a neat calculator. The payback in relation to savings will depend on where you live. This calculator will help determine that based on your power/gas rates and your degree days.

http://www.acdoctor.com/cooling_calculator.php

Good Luck

Jay

sdsheatcool 09-19-2009 12:04 PM

SDSheatcool
 
You may want to consider this: If you era putting in the 14.5 S.E.E.R Heat pump and they are offering it with a variable speed air handler, you may achieve a 15 S.E.E.R rating. Which may then qualify the system for the federal tax credits that are availablt to residential customers. (30% tax credit on the contact price up to $1500.00total tax credit). If the cost of the upgrade is only $1500.00 and the contract price is over $5000.00. You qualify for the entire 30%(or$1500.00). That would make the return on investment immediate and the rest a mute point. You can read more on these tax credits @ energystar.gov


All times are GMT -5. The time now is 08:11 AM.