Victorian houses and colonials on the peninsula were piped for steam or hot-water radiators. Oil is still the primary heat in more than half of Maine homes. A cold-climate heat pump, usually ductless, is how those houses drop the oil truck.
Ask for a heat pump sized to keep your home warm on the coldest usual winter day. The price uses the ME and utility programs your address qualifies for. No sales call, no information sold, no pressure.