A member emailed me the following comment which I forwarded to NRCan.  I hope this is helpful.

COMMENT: 

I just had a couple of HVAC techs at my place working on our ASHP (main board got disconnected in one of the wind storms). They really don't like the requirement for a mini split head in the basement. They've already seen messes created by the large amount of condensate the units create and the limited exterior height to drain properly. Clients who don't want a condensate line and pump in their finished basement room, risk an outdoor drain line clogging and backing up or creating a puddle and draining back toward the wall .

NRCan REPLY:

Dealing with the condensate coming from a heat pump unit installed in the basement is no different than having a condensing furnace installed in the basement.

When an equipment is installed in the basement or under the grade line, a condensate pump is installed to assist with pumping the condensate outdoors.

Building code already requires drains in basements.   So the problem with this would be the heat pump is not close to that drain which is a problem no matter where you put the head.   This seems like a problem for Integrated design to solve.      One of the solutions we worked on was to use a hidden cassette in the ceiling of a closet.  This allows for much more flexibility on where the drain goes and is minimally disruptive to the house with plenty of space to add a condensate pump.   It also looks better than the wall mount.