Why Radiant Heat?
Radiant Heating makes all the renewables more green!! Radiant Heating makes Mod/Con boilers more green!! Properly designed Radiant heating has the lowest design water temperatures out of all the systems. This means you can get more energy out of your system. Efficiency has a lot to do with delta tee. Radiant heating lowers the delta tee in most systems.
Radiant heating is widely regarded as the most comfortable, healthiest, and most natural heating process available. People are warmed in the same way as they are warmed by sunshine on a cool day. Floor drafts, cold spots, and dry air are eliminated. Dust, air contaminants, bacteria, and low humidity levels, all problems associated with forced-air heating, are nonexistent in a home with a properly designed radiant heating system.
What is Radiant Heat? Hold your hand over a hot cup of coffee and feel the heat. The typical conclusion is that heat rises. Typical maybe, but incorrect! “Hot air” rises but “heat” can travel in any direction. That is why you can feel the heat of the cup when you place your hand to the side of it. Radiant energy transfer is caused by a warm surface giving up its heat to a cooler surface. Whenever there is a temperature difference between two surfaces, both surfaces will attempt to equalize. Radiant energy travels through space without heating the space itself. It only turns into heat when it contacts a cooler surface. Our human comfort relies just as much on radiant heat transfer as it does on air temperature, yet the majority of heating and air-conditioning professionals think only in terms of air temperature.
(From the Radiant Panel Association’s website)

