Quote:
Originally Posted by John Mercier
I think he was asking less about the lowest reasonable operating temperature and at what point efficiency dropped to the point that oil was less expensive.
It is like my car... I can go nearly 120 mph depending on conditions... but I'm pretty sure that is not the most efficient manner to run my car.
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I understood that, and I asserted that he will be way ahead of oil if he runs mini splits through the entire winter, and never flips over to oil. There is a mountain of info supporting this, including the link posted above by Doug, and a fair number of forum members who have experienced it. If an oil fan is able to show data that shows that a significant number of days are better for oil and therefore you should have two entire systems, I look forward to seeing it.