hello all:
I'm getting conflicting opinions on appropriateness of Heat Pump in Delaware.

I know clearly that its not a good idea for cold climes - lets say NY state, CT or north ...
but I gez DE is not as cold as those states

but what i'm hearing is Heat Pumps are best used in Virgina or South of it.
any further north the furnace is going to be running more often and the operating savings vs initial cost isn't going to be sufficient.

can someone point me to more info on how approp a heat Pump is for what kinds of temperatures and what is the web-site I can find how many days of what temp we have in the DE area?

thanks yall