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Operating cost of mini-split vs electric vs propane

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theoldwizard1

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Feb 22, 2011
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Location
SE MI
Some addition comments


  • Electric baseboard heat is probably the cheapest and easiest to install. The biggest draw back is you can not place anything in front or it will block the heat flow and/or potentially be a fire hazard.
  • Ceiling hung propane/natural gas fired heater/furnace is probably the second cheapest/easiest to install. These work great for recovery, especially if the area has had no heat for several hours. Oversizing does not cost a huge amount extra.
  • Mini-split heat pumps are probably the most expensive to install, but the big bonus is that you get A/C for free. Oversizing is a good idea, but big units tend to be less efficient and cost a lot more.

In the video, there is a fairly detailed explanation of cost of operation of all 3 choices. The biggest issue is obtaining Coefficient of Performance (COP) across the ambient temperature range for you specific mini-split ! This data is not easily available for any of the systems I have researched. Without out it, any claims of "cost of operation" are just wild *** guesses !

Most interesting "take away" that I got from the video is that in the mini-split vs propane "cost of operation" debate, propane does WIN if your temperatures are below about +10F !

The author of the above video lives in Northern MN. He know that the number of hours per year when the temp is below +10F is not that many. Mini-split "cost of operation" WINS BIG TIME when the outside temperature is above +30F ! He even states, that having some kind of non/low electricity demand heating solution is a good idea.
 
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yeldogt

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Jan 2, 2012
Messages
18,184
It's math .....

Most hyper mini-splits have at least 3 COP -- even down low on the range. So they are producing heat at 3x resistance heat even in very cold temps. Heat pumps are always going to be cheaper than resistance. Always. Same with modern split VS equipment.

Propane is all about cost ..... Again -- what is the cost vs using a heat pump. Just plug in the electric cost and fuel cost .... propane is going to be in the 80-96% range.

There is always a bit of guessing ...

If you live in a cold climate -- you have to know the heat curve of the equipment. If you have a month of normal cold weather every year and you HP is not going to work in -10 degree weather .... it may not be the best way to go?
 
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