Is the "heat pump" in the AC unit or the furnace?

[JimGnitecki]

The DRV option list for a specific DRV Tradition we will be looking at tomorrow shows a "heat pump" option with an MSRP of $334.

It would SEEM to me that such a heat pump feature would be found in the overhead AC unit, BUT, this specific coach also has TWO AC units, which would imply the need for quantity = 2 for the heat pump, but it does NOT say "2".

So, is this heat pump feature somehow built into the furnace?

Or??

Jim G