Short rams aren't "cold air" intakes at all, but its become a catchall term for any aftermarket tube intake.
An actual cold air intake (which is a coined term) is run away from all sources of heat and places the intake filter in a sealed off area, usually outside of the engine bay, to intake cold/fresh air. These are usually in wheel wells, tucked behind valances or aero, or even on the outside of the vehicle itself (ie. a Jeep snorkel).
for a short ram or any intake within the engine bay, its best to at least segregate the filter from the engine bay, and have a source of outside air. Luckily, I can use this time to shamelessly post a video of myself considering this same problem.