New Old Stock Sanden HP Water Heater: Worthwhile to Purchase?

I have an opportunity to purchase what appears to be a first generation Sanden heat pump hot water heater (see attached picture). Unit is complete with all parts (Tank +… I have an opportunity to purchase what appears to be a first generation Sanden heat pump hot water heater (see attached picture). Unit is complete with all parts (Tank +…Read MoreGreenBuildingAdvisor