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- เผยแพร่เมื่อ 16 ต.ค. 2021
- I created my own spreadsheet to see if I could figure out when it would be more appropriate to use my new mini split in heat pump mode based on the price of oil, price of electricity, and the temperature inside as well as outside, as compared to my oil fired furnace.
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Just watched your video and was looking at your methodology and calculations.
I did something similar as I have oil heat and baseboard forced hot water radiators I also have separate whole house central A/C. here in MA. Have been considering swapping out A/C with a heat pump. Did the calculations virtually the same way you did and I have lots of years of data. Use 600 Gallons of oil per year but 360 is for domestic hot water per year and 240 for heating home. Accounted for total BTU’s electrical power consumption motors, nozzle size etc. and waste heat from cast iron boiler as base load for home via basement. Oil at $3.69 gallon an electricity delivered at .31 KWh.
Would have to decommission boiler and hot water take and put in Whole house heat pump / cold weather type Mitsubishi, Daikin, LG top models 3 ton … plus hot water heat pump. 10K Utility rebate. Ave had 4 quotes from large HVAC dealers between 27 to 35K. Laughable to put in 10K Mitsubishi complete all parts 20:03 or equivalent to replace virtually identical central A/C they want between 17K and 23K just for labor / overhead!
By my many calculations virtually no energy cost savings from fuel oil vs electricity.
In MA the 10K rebate is a moral hazard along with 0% financing for 7 years. It disguises the true cost to the buyer. The capitol equipment cost is horrific and labor s well and like an A/C will likely only last 15 years then rinse and repeat.
Please can you do an updated video with the almost $5/gal of fuel loved your calculations? My AC died in the fall of 2022 and I replaced it with a heat pump with oil as backup.
do we know the seer rating of Mr cool unit ? Thank you
Sure enough, my rates went up as promised.
@kevin can you upload the spreadsheet
Now that oil is going north of $5 a gallon, heat pump is looking like a great option.
I was just going to say, those oil costs are drastically off, then realized this was recorded in October 2021, the calm before the storm.
The heat pump looks to have been more efficient until around single digit degree exterior temps with oil only at $2.65/gallon. Given oil is now double that amount (and likely never to come back down again), it seems like heat pumps are a no brainer. Plus, we only go down that low a handful of times overnight in winter in NY / Long Island where I’m located and at that, only for a few hours per day. Can also just avoid heating during that time and end up being cheaper to run 100% of the time. With the majority of heating throughout the year being significantly cheaper (even if oil gets back down to the mid $2 range).
I think that they also have more efficient heat pump setups aside from the mr cool mini splits. I have force heat and forced air, so replacing my existing A/C units outside with heat pumps should be fairly straightforward. Then can get rid of the boiler and nasty oil tanks and probably even recoup some costs as my equipment isn’t super old.
At $5 a gallon, just fire up a space heater.
@@chrisE815 Space heater has a max COP of 1. Heat pump substantially outperforms that. Even in very cold temps.
@@GuyOnTH-cam Yes I should do a second round of my analysis based on HIGHER electrical rates AND higher oil prices!!
@@kevin9c1 yeah kind of my point. It's now cheaper to run resistance heat than oil
How about factoring in all of the delivery, tax and other surcharges on the electric. What would that do? I love this analysis. It’s so sensible and you are doing it logically
I did my best to factor that into the overall rate. I realize it doesn't scale perfectly linearly but it's the best I could do. Basically I just divide the total bill into kWh used and get a generalized overall rate. It's better than NOT taking into account those things, because they seem to almost double the bill!
I just calculated my approx rate from my last bill which accounted for usage mid-aug to mid-sept. The approx rate was still $0.21/kWh. However, I think it is about to go up a few cents, or just just done so. Maybe I'll wait until then to recalc my whole sheet.
Thank you! Very informative.
called the distributor for a price on heating oil in Northern California the other day. Todays date is 3-26-23. The price quoted was $5.40 a gallon. Next thing they'll do is outlaw wood burning stoves. Any bets?
Already did pretty much EPA restrictions mean manufacturers can't sell "new old stock" and have to meet new standards every time they turn around, eventually the number will be unattainable. I bought a new stove, same model as another one I had in another house, but it put out 1/2 the heat, burned a little longer though. After dissecting the two to see what the problem was, the intake air holes were 3"x 3" wide open on the old one and 1/2" by 3" on the new one. When you shut it down it almost smoldered, can't see how that is more efficient. My stoves have secondary combustion air so the smoke gets burned there, but not catalysts, those are pricy.
Bravo
can you send a copy of the spreadsheet? I'd like to calc some scenarios as well!
Yes I will post a link. You are the second person who asked.
@@kevin9c1 Howdy did youy ever post a link? Thanks
@@Rainbowrobb I did not but you know what I meant to is make a part 2 of this with updated electric rates and oil prices to see how things are looking.
@@kevin9c1 Did you post the link would love to play with updated cost numbers. Thanks.
Great job figuring this stuff out.
I'd like a copy of this spreadsheet as well. I could re-create something similar for my setup with propane boiler, but it'd be much easier to start with your template.