The picture is of a ventilated crawlspace in the snow belt of central Ontario—Caledon East.
It shows heating ducts, drainpipes, and potable water pipes on the ceiling of a crawlspace. The crawlspace is ventilated to the outside through a pair of opposing foundation grates on either side of the side addition to allow for cross ventilation. The contractor/architect unfortunately delineated the thermal boundary at the main-floor floor cavity, orphaning water pipes and heating/cooling ducts. In fact, the furnace was in that unconditioned crawlspace, which is effectively outside!
Adding insult to injury …