Geothermal HVAC

Do the typical differentials for split system A/C units also apply to geo-HVAC units? Is excessive condensation on attic unit and on supply registers common for geo-HVAC?

What is ever acceptable about excess condensation?

Write up what you see and express your concern. Move on.

Moisture in the wrong place is ALWAYS bad.

General operation of a geothermal system is exactly the same as a more common split system. The only difference is that it is a single unit and the freon is cooled (or heated in the winter) with a heat exchanger instead of pulling air through the coils on the condensing unit.