Heating systems for new home

[ishoot308]

Originally Posted by FlyingScot

Yes, this is why I am confused. I understand that a minisplit on warmer days is better than a minisplit on colder days. But the question is whether a minisplit on colder days is better than oil on colder days. If a minisplit is 30% better than oil in general, and oil is assumed to be always at 100% of its own efficiency, then doesn't the minisplit need to fall to 70% efficiency before oil is equal, and 69% before oil is more efficient? If all of this is the case, then the minisplit on a -13 day at 85% is still the best choice

Isn't the efficiency of an oil burner on average around 85%?? I realize some of the newer ones are better but for the most part 85% is pretty standard is it not?? Which would mean the mini split at -5 would be far more efficient would it not??

Dan

[John Mercier]

Originally Posted by ishoot308

Isn't the efficiency of an oil burner on average around 85%?? I realize some of the newer ones are better but for the most part 85% is pretty standard is it not?? Which would mean the mini split at -5 would be far more efficient would it not??

Dan

If it put out enough BTUs at the lower efficiency.