VA Tech used a radiant floor heating system. You can see the
tubing (red) which is surrounded by aluminum, which acts as a heat
sink. That's covered by a foam pad (black), then the hardwood flooring.
Crowder College installed their heat
tubing in the ceiling. The ceiling material is metal so it radiates
comfortable warmth into the room. Their system is designed so that cool
water can be circulated through the tubes in the summer. Crowder's
house was exceptionally attractive and comfortable feeling.