The EC Series is built using a proprietary four loop exhaust system that results in higher effi ciencies and heating power than the traditional three loop system used in most heaters:

- Comes standard with a four-loop heat-exchange, providing a longer path for exhaust gases to release their heat before exiting through the chimney. The end result is a 2% increase in effi ciency over the performance of the traditional three-loop heat-exchange
- Hot gas passages between the EC Series fi rebox and exchanger are exposed to lower temperatures, pumping up the heater and gaining an additional 10% in heating power compare to three loop units with the same size.