Hi All, Looking into using geothermal for a new construction home we are building in lower Connecticut. Our current fuel option we are weighing against are propane and oil. A builder we had been talking with asked if we had given geothermal a thought and after some short research I see the most commom issues being excessive electric bills whether it's from the back up system or the heat pump drawing a lot of electricity. The house is about 3,000 sqft of finished space with another 1200 possible to finish in the basement that will have 9' ceilings. The only nuance is a two.story family room so I am not sure about how much of a chimney it will act as. Looking for any thoughts or inputs especially from those who have a system in a similar climate and most interested in wherher it keeps up on the cols days with out switching to electric heat.