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Old 06-08-2009, 09:12 PM   #31
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From what I know heat pumps can be less comfortable for some people as the supply air temp is a lot lower than that of oil. Same thing with geothermal. They run longer with a lower supply air temp and older sedentary people or those with poor metabolism don't like that. That is why radiant heat is so popular. You may want to consider that as you will have to live with your decision for a long time. Cost is one thing, comfort another.

Good Luck

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Old 06-09-2009, 11:20 AM   #32
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Quote:
Originally Posted by brohar View Post
My Electric rates are currently around .08-.09.
i was using about 600 gallons of oil a year.
600 gals x 0.8 = 680 therms = 19,600 kwh = ~$2000, and you'd pay 1/3 of this with heat pump heat, depending on how often your outside temp. drops below 35F.

Last edited by Yoyizit; 06-09-2009 at 11:24 AM.
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Old 06-09-2009, 03:03 PM   #33
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Quote:
Originally Posted by Yoyizit View Post
600 gals x 0.8 = 680 therms = 19,600 kwh = ~$2000, and you'd pay 1/3 of this with heat pump heat, depending on how often your outside temp. drops below 35F.
In Cincinnati the mean number of days 32 degrees and under is about 100/per year. So how does that work into your calculation if i have to use electric to back up the heat pump.
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Old 06-09-2009, 04:28 PM   #34
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Originally Posted by brohar View Post
In Cincinnati the mean number of days 32 degrees and under is about 100/per year. So how does that work into your calculation if i have to use electric to back up the heat pump.
1/3 of the year you'll be at the higher rate. 0.7 x 19,600 x .03= $400 +
0.3 x 19,600 x .09 = $530 = $930, total.

While I have your attention can I get the sq. footage of your house, including basement, for a top secret project I'm working on?

Last edited by Yoyizit; 06-09-2009 at 07:25 PM.
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Old 06-09-2009, 08:59 PM   #35
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Quote:
Originally Posted by Yoyizit View Post
1/3 of the year you'll be at the higher rate. 0.7 x 19,600 x .03= $400 +
0.3 x 19,600 x .09 = $530 = $930, total.

While I have your attention can I get the sq. footage of your house, including basement, for a top secret project I'm working on?
The living area is about 1250 SQ which i do not think includes the basement. the basement is not heated or cooled but the basement ceiling is well insulated.
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Old 06-10-2009, 12:14 PM   #36
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SW Ontario, Canada
398.7 cubic meters = 140 therms of NG in 28 days = 5 therms/day
2900 sq. ft. including basement gives 5/2900 = 170 BTU/day/sq. ft.
664 HDD/28 = 24 HDD in one day
170/24 = 7.1 BTU/sq. ft./HDD
Effic. factor 0.8
final 5.7

D.C.
838 therms of NG in 90 days = 9.3 therms/day
3100 sq. ft. including basement gives 9.3/3100 = 300 BTU/sq.ft.
2658 HDD/90 = 30 HDD in one day
300/30 = 10 BTU/day/sq.ft./HDD
Effic. factor 0.8
final 8.0

SF, CA
2.3 therm/day
2700 sq. ft. gives 85 BTU/day/sq.ft.
540/30 = 18 HDD in one day
85/18 = 4.7 BTU/sq. ft./HDD
Effic. factor 0.8
final 3.8

San Diego, CA
29,000 BTU/hr = 21 therms/30 days = 0.7 therm/day
1560 sq ft including basement gives 0.7/1560 = 45 BTU/day/sq.ft.
270 HDD/30 = 9 HDD in one day
45/9 = 5.0 BTU/sq.ft./HDD
Effic. factor 0.8
final 4.0

victoria, BC
So 750 gals of oil giving 1100 therms for 4900 HDD for 180 days for 2000 sq. ft.
6.1 therms/day
2000 sq. ft gives 6.1/2000 = 305 BTU/day/sq.ft.
4900/180 = 27 HDD in one day
305/27 = 11 BTU/sq. ft./HDD
Effic. factor 0.8
final 8.8

Cincinnati, OH
600 gals/yr, 680 therms for 5096 HDD for 365 days for 1250 sq. ft.
1.86 therms/day
1250 sq. ft. gives 149 BTU/day/sq. ft.
5096/365 = 14.0 HDD in one day
149/14.0 = 10.6 BTU/sq. ft./HDD
Effic. factor already in there
final 11

Wisconsin Energy Study gives
4.4
1.7

Ranked
1.7
3.8
4.0
4.4
5.7
8.0
8.8
11

Range 1.7 to 11
Median 5.0
Average 5.9
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Old 06-10-2009, 01:01 PM   #37
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Yoyizit Thanks for including me, house size and location are dead on ....now what do I do with the 5.7
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Old 06-10-2009, 02:02 PM   #38
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Are those day light basements, or completely submerged/below grade.

Are they finnished basements?
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Old 06-10-2009, 02:37 PM   #39
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Yoyizit Thanks for including me, house size and location are dead on ....now what do I do with the 5.7
Since you're at 11 [my 40 yr. old house is at 8.0] I guess I'd look for some confirmation of your heat loss, and then look into payback periods for addt'l insulation, considering this along with how long you plan to live in that house. >10 yr. paybacks are almost the same as "never" and people move on average each 7 yrs.

In temperate regions insulating value may not be that important, but you're not in one.
http://www.energystar.gov/index.cfm?...sulation_table

But first get a lot of opinions from hands-on-HVACers.

Last edited by Yoyizit; 06-10-2009 at 02:41 PM.
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Old 06-10-2009, 04:50 PM   #40
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Quote:
Originally Posted by Yoyizit View Post
Since you're at 11 [my 40 yr. old house is at 8.0] I guess I'd look for some confirmation of your heat loss, and then look into payback periods for addt'l insulation, considering this along with how long you plan to live in that house. >10 yr. paybacks are almost the same as "never" and people move on average each 7 yrs.

In temperate regions insulating value may not be that important, but you're not in one.
http://www.energystar.gov/index.cfm?...sulation_table

But first get a lot of opinions from hands-on-HVACers.






TOO MANY NUMBERS!!!!!!!

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Old 06-10-2009, 04:56 PM   #41
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TOO MANY NUMBERS!!!!!!!

How 'bout I offer you $1 or $10 or $100? You want to go with the smaller number?
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Old 06-10-2009, 05:00 PM   #42
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Quote:
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How 'bout I offer you $1 or $10 or $100? You want to go with the smaller number?
Them kind of numbers talk!! They say "Clover it's time to go to the casino and drink La Batts til you puke"!
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Old 06-11-2009, 08:32 AM   #43
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im confused? so 11 is good? Anyways, Ive had 3 guys come out. One was a thief the other two are legit. Whats your thoughts on the York LX YHJF vs Carrier Performance Series 25HPA5?

Last edited by brohar; 06-11-2009 at 08:55 AM.
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Old 06-11-2009, 08:31 PM   #44
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im confused? so 11 is good?
No, 11 is the most heat loss of all the samples I have.

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