I don't, currently, have a heat pump. The house is a 2 story with a partial attic, built in the early 1900's, with 24' by 80'.

It is partially heated by oil, with the second floor unused and only enough electric heat their to prevent pipes from freezing.

Their are 4 people living in the house, with 2 living in the portion with oil heat, 2 living in a portion about 24' by 10' heated by electric heat, and an electric stove/oven to cook with.

Last month's usage was 2777kwh. I am looking into getting a heat pump for the place, but as it is such a big house, with much of it unused, sizing it correctly is fun to say the least.