On the subject of cieling fans:  with our system, a cieling fan will do nothing to contribute to the effectiveness of the system.
Hot air rises, true.  To push it back down to our level instead of letting it hang out up on the cieling can be worthwhile, hence the cieling fan.  But our system makes heat, and heat doesn't rise, it radiates from its source. 
The only thing a cieling fan would do is create a breeze, or a simulated draft.  This would take away some of the things that makes our systems, and radiant heat in general, more comfortable than a forced air system.  For example, it may blow around allergens and the like, keeping them airborne and breathable instead of on the floor and vacuumable.
With STEP Warmfloor, your cieling fans are relegated to those times of year where you don't need heat.
Unless you like the breeze.