The eF Series™ line has grown to seven models with the addition of one 100-gallon capacity unit with 150,000, 199,999, 250,000 and 300,000 Btus and three 60-gallon capacity units with 125,000, 150,000 and 199,999 Btus. All models offer installers the ability to vent unbalanced the equivalent of up to 120 feet utilizing 3-inch ABS, PVC or CPVC piping or 170 feet utilizing 4-inch ABS, PVC or CPVC piping.
