The eF Series® utilizes exclusive designs and technologies for unsurpassed efficiency, installation flexibility and quiet operation. With thermal efficiencies as high as 99.1% these units are the most efficient of their kind in the industry. The eF Series® can vent vertically or horizontally with either 3 or 4 PVC, CPVC or ABS vent pipe, and is approved for direct vent closed combustion applications or those applications that require inside air for combustion.

(Sample model numbers include: EF‑60T‑125E‑3N, EF‑100T‑150E‑3N & EF‑100T‑300E‑3N)

• 99.1% thermal efficiency
• 60 Gallon in 125,000, 150,000 and 199,999 BTU's
• 100 Gallon in 150,000, 199,999 , 250,000 and 300,000 BTU's
• Versatile venting
• Electronic controls
• Premix power burner
• Submerged combustion chamber
• Zero inch clearance chamber
• Three pass flue system
• Four Protective magnesium anode rods
• Factory installed Hydrojet® Sediment Reduction System
• Hand hole cleanout
• Vitraglas® lined tank
• Factory installed dielectric fittings
• T&P relief valve
• Brass drain valve
• Non-CFC foam insulation