My central AC compressor bit the dust last night. I had a family friend come out to look at it and he said that I need a new unit (he is a lifetime HVAC person). My AC unit was/is from the early 70s, original to the house, so I expected it to go.
Anyway, I have a free central AC system coming to me, via my father, so I could replace this for only the labor. However, I have an oil furnace so I was thinking of getting an add-on heat pump and use the oil furnace (circa 2002) as supplemental heating. My question is, would it make sense to get this or should I just stick with oil? I am looking at both the resale value of the house and the running costs (mainly the running costs). At $3.80/gallon (in my area, PA, oil was about $3.70 at the end of the winter) and $.104/kwh (going up to $.15 in 2010) what would be the best choice? I am only heating 1200 ft2.