Wait for upcoming cold weather heat pump tech?

My Minneapolis 1950’s house has been professionally air sealed and insulated with before/after blower door testing and has central ducted HVAC. The AC unit and furnace are both apx 25… My Minneapolis 1950’s house has been professionally air sealed and insulated with before/after blower door testing and has central ducted HVAC. The AC unit and furnace are both apx 25…Read MoreGreenBuildingAdvisor