Going to be a long one here. So let's get started. I will say in advance "Thank you all".
History of all this begins with:
My house burned down in 2005 and was rebuilt. Moved in in 2006. The house has 2x6 exterior walls, pella high end windows, 2100 square feet main level ranch, 9 to 11 feet tall ceilings and 2100 walk out basement finished for a total of 4200 sqft. Now I wish I would have done all this ground source thing when rebuilding but I didn't know I was under insured by $54000. I purchased a 90% propane furnace and a 13 seer air source heat pump which is set to heat down to 35 degrees. Both are Lennox brand.I live in western Missouri. I have completed the calculations on what it costs to heat and cool my house over the last 18 months. The annual cost is $3468. I use an average of 1600KWh per month at a cost of .0919 for the first 600kwh, .0496 for the next 400 kwh and .0411 for the remaining. I am on a level payment for electricity of $135.00 per month.
Now for propane. I have calculated that I have used 1235 gallons over the same period. I use propane for the furnace and the hot water heater. The current price per gallon for propane is $2.24 per gallon. I expect that to only increase.
Now for the investment question. It's going to cost me $20,400 bucks to install a Florida Heat Pump Envirosaver ES with desuperheater and two stage scroll compressor with closed ground loops. What's your opinion on this unit? A 23.5 EER for cooling with water temp entering at 77 degrees and in part load(1400) and a cop of 4.0 for heating with water temp entering at 32 degrees. The water temps should enter at around 55 degrees shouldn't they?
Which I think would increase efficiency. The local electric company will kick in $850.00.
Additional costs are: 10 year warranty parts and labor $933.00 gotta have.
High efficiency air filter $250 mineas well.
Pipe in outside air circulation $850 want this to.
For a total of $21,600. Plus I'll need to get an electric hot water heater and use my propane one as a buffer tank storage tank.
Now the contractors print out says that I will only spend $881.00 per year to heat and cool. This is where I have a problem. $3468 - 881 = $2587 savings.
$881 per year is only $74.00 per month. Which if all this is correct GREAT.
But still about a 9 or 10 year break even point depending on final bill. They always seem to be more. Like if we hit rock when trenching.
Is this in line or not. I was expecting about a 6 or 7 year break even point.
Would you do this?
Thank you again,