We have old Amana gas glycol system that we are told can't be fixed. If I understand right, it used glycol to heat hot water that also heated and cooled the house. Now we need everything. Need recommendations for boiler, air and hot water. Repair HVAC is telling us 2-stage 92-95 efficiency heating system is what we need. Plus hot water heater (50 gal. currently) to be installed by plumber. We're waiting for specifics and prices. Any other suggestions or things to know to ask intelligent questions. We are babes in the woods and need to make a decision quickly because if Amana goes out completely, we're out of heat, hot water and luck.

House in in NC and it's 1800 sq. ft.

Thanks for assistance.