Heat pump needing natural gas backup?
I am replacing an old oil furnace with a heat pump. One company that has given us a quote is strongly suggesting having a hybrid system which uses natural gas as a backup. They say heat pump will not suffice for us when the temperature is lower than around 30, and that the heat pump air is much 'cooler' coming out.
A second company is telling us a heat pump will suffice just fine, with the backup being electric heat coils in the handler.
Of course, the heat pump by itself is pricing out quite a bit cheaper than the hybrid system, and will not require us to bring in a NG line (which would be free, just some drilling from the street).
My question is, do we really need natural gas as a backup for those lower temperatures?
Some specifics: I live in North Carolina, and while we have had some cold winter recently, they are nothing like those in the north. The house is 2200 square feet, split-level.
Thank you for any advice on this.