>>11099478>Water source heatpumpsDamn. ACfag here. Those are insanely high end units for a residential building. If it was more recent units with a high efficiency rating, it'll be hard to diagnose when it breaks. They use all proprietary parts, and are almost designed on purpose to be a pain to diagnose. Don't be surprised if when one breaks your AC guy has to call tech support to figure it out. High end ACs are brutal to work on.