Geothermal heat pump on 8500 sf lot in Massachusetts?
We are moving into a house that was built in 1941 and needs a heating system overhaul. Our choices are to bring natural gas to the house (it is on the street) or to install a geothermal heat pump. The house has some existing duct work for a/c, but it is old and not extended to an addition of the house. The current heat is oil fueled to radiators. The lot is about 8500 sf, and the house is about 1850 sf (although we are going to put on addition of 500-800 sf.) I am intrigued by heat pumps, but I can't decide if this would be a good choice for an older New England home on a small-ish lot. Most contractors around here are more familiar with gas heat. Any input?
Thanks so much!