RADIANT boilers offer a remarkably high 97% thermal efficiency. This means that $0.97 out of every fuel dollar goes into heating the water, dramatically reducing the operating cost of the equipment. RADIANT achieves this efficiency through the combination of an advanced fan assisted combustion system and highly durable 316 stainless steel exchanger. A time tested proven combination. The heat energy from the combustion process is transferred to the water as it passes through the 316 stainless steel heat exchanger. The sealed combustion design eliminates external heat losses, this means that the energy dollars heat the water, not the mechanical room. It also ensures that the boiler jacket stays cooler, providing greater safety, and requires less clearance from combustible walls.