1. I think you lost me.
If LP is only 25 cents a gallon cheaper then oil per gallon. Then LP cost a lot more per BTU the oil.
LP has less BTUs per gallon then oil.

Oil, at the former posted price and efficiency is, 33.6 cents per 10,000 BTUs.
LP, at the former posted price and efficiency is, 31.5 cents per 10,000 BTUs.
Thats with LP being \$1.25 a gallon cheaper then oil.

If its only 22 cents a gallon cheaper then oil, LP would cost 43.2 cents per 10,000 BTUs

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Lets say take pricing from 2/21/05. Oil was 214.9 cents a gallon and propane was 182.4 cents a gallon. At 85&#37; and 95 % efficiency resp. Oil gives you 55375 BTU/per dollar spent, and Propane gives you 47,917 BTU/dollar spent.

85% * 140000/(214.9/100) = 55375
95% * 92000/(182.4/100) = 47917

What i did next was figure out the difference in BTU from oil to propane at this cost per dollar. This gave me a number of 7485 BTU fewer BTU's that came from the propane at this cost per dollar

i then figured that for every gallon of oil that gave me 55,375 BTU's of heat, i needed 1.09 gallons of propane.

7485 BTU's of heat /(92000 BTU *.95%) = .09

So 1 gallon of Propane gave me 47,917 BTU's Along with another .09 of a gallon to give me 7485 BTU's will give me 55375 BTU's

So to figure out the cost, I ,multiply the cost of 1500 gallons of oil at the above mentioned price to get \$3223.50. To figure the equal cost of the same amount of BTU's for propane i multiplied 1.09 * 1500 to get 1628 gallons times 182.4 to get \$3212.05

3. Originally Posted by doogan123
Lets say take pricing from 2/21/05. Oil was 214.9 cents a gallon and propane was 182.4 cents a gallon. At 85% and 95 % efficiency resp. Oil gives you 55375 BTU/per dollar spent, and Propane gives you 47,917 BTU/dollar spent.

85% * 140000/(214.9/100) = 55375
95% * 92000/(182.4/100) = 47917

What i did next was figure out the difference in BTU from oil to propane at this cost per dollar. This gave me a number of 7485 BTU fewer BTU's that came from the propane at this cost per dollar

i then figured that for every gallon of oil that gave me 55,375 BTU's of heat, i needed 1.09 gallons of propane.

7485 BTU's of heat /(92000 BTU *.95%) = .09 You just divide the

oil 55375/LP 47917 = 1.155 So at the rates you posted \$1.155 worth of LP to provide the same BTUs as \$1.00 of oil.

Or you need 1.155 gallons of LP at 95% to equal 1 gallon of oil at 85%

So 1 gallon of Propane gave me 47,917 BTU's Along with another .09 of a gallon to give me 7485 BTU's will give me 55375 BTU's. Incorrect math.

So to figure out the cost, I ,multiply the cost of 1500 gallons of oil at the above mentioned price to get \$3223.50. To figure the equal cost of the same amount of BTU's for propane i multiplied 1.09 * 1500 to get 1628 gallons times 182.4 to get \$3212.05 Your math is incorrect here. 1628 * \$1.824 = \$2,969.47
So 1500 * 1.155 = 1732.5 gallons of LP at \$1.824 = \$3,160.08
If you don't buy your own tank, you will pay a min of 50 cents per gal tank rental.
So 1500 * .50 = \$750.00
So \$3160.08 + \$750.00 = \$3,910.08 For LP.

Instead of using prices from last year. Call and see what price you can lock in for both for this winter. And then recalculate it.

Don't take this wrong. It doesn't matter to me which one you use.
If you want to switch to propane so you can have a gas grille, range, and dryer, fine.
But, don't disillusion yourself into thinking it will be cheaper.
Find out the cost of both first.

4. dual fuel would be another option

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Originally Posted by doogan123
I am looking to install radiant heat on ground floor, with hot air on 2 floor.

Been there - I am not sure i follow what you are saying ( excuse the lack of experiance on heatpumps)
Install radiant heat on ground floor? Is that in basement? Is that going to be installed in cement, Quick Track, or Aluminum Extruder Plates? Would you be using Tekmar Controllers and thermostats? What size tube?

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## only way to make LP cost effective

is to probably get 2 500Gal LP tanks and bury them on the property if you can. Buy most of your LP off season. I just get a bit worried over the safety of an LP boiler in a basement. LP is heaver then air and will pool down there if there's a leak. Maybe if you can install all the equipment in a garage it would be better, keping it all at ground level.

7. Iys no different then having a NG boiler in a basement.

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beenthere - thanks for the critique - if i was good at this stuff - I would be doing it for a living . I did transcribe one of my numbers incorrectly ( 1628*1824 cents really does = 2969.47)

In term of calculating the amount of propane per gallon of oil - I have substituted your example above into my sheet - thanks for that. It changes the numbers some what - however it still shows the trend that i was trying to get - even tho its now shows that it was cost effective on and off since '05, but since early '07 its been consistantly better to have Propane given the prices in my area. In terms of recent pricing - I have all the quotes from suppliers in my area and oil is currently stil more expensive

I appreciate your candidness - I am not looking for anyone to tell me which one to use - rather i like to understand which makes more sense for me.. as with everyone i am sure...
I have no preference for propane - I have used oil for 20 years - but with my need for a gas stove top, dryer and bbq - I do think it makes sense in this envirnoment

Originally Posted by johnsp
is to probably get 2 500Gal LP tanks and bury them on the property if you can. Buy most of your LP off season. I just get a bit worried over the safety of an LP boiler in a basement. LP is heaver then air and will pool down there if there's a leak. Maybe if you can install all the equipment in a garage it would be better, keping it all at ground level.
John - this is not a bad idea. I will price this out also. My boiler will be in my garage which is at grade level - so this should be ok. Are you aware of any code limiting this ( 2 tanks?)

Thanks everyone....

9. You'll need to check what your local code enforcement is.

PS: are you buying, or renting the tanks.

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Originally Posted by beenthere
You'll need to check what your local code enforcement is.

PS: are you buying, or renting the tanks.

I would consider buying - unless there is a compelling reason to rent?

11. Renting cost more, since rent is charged per gallon.

If you own. And a tank regulator leaks, and you lose all your LP. You must pay to replace the regulator, and to replace the LP.

If you rent, they are responsible for the tank reg, and would replace the LP at their expence.

If you buy your own tank. A buried tank, sized to hold all the LP you need for the winter is a better option.

Why refill it during the heating season, when prices are up. You want to be able to make it till summer, when the price will be at its lowest.

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makes sense..

Have you seen regulators to leak often? .. that would be a sickening?

thanks a bunch for your inout - i appreciate it. Now off to pricing the systems....!!

13. Originally Posted by Tiger93rsl
In upstate New York a heat pump is of no use except for a few weeks out of the year. I would stick with a 90+ natural gas furnace. Unless you are on 3 phase electic service and your electic rates are cheaper than they are in Colorado

The more cold weather the better eeason to use a heat pump. They have alot of 20-60 degree weather, 10 month's a year! Absolutely go dual fuel heat-pump with propane in my opinion.

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