Primary Heat Exchanger is constructed of Commercial-Grade Copper which is more resilient against erosion and is 25x better at heat transfer than stainless steel thus stabilizing outgoing water temperatures quicker.
ENERGY STAR® Qualified
Air-Fuel Ratio (AFR) Sensor
Exhaust & Water Temperature Safety Control
Provides flexible venting with PVC, CPVC, or ABS Pipe for Intake and Exhaust (solid core only).