Peirce-Phelps introduced the Eternal hybrid water heaters line in June 2012 and has seen a significant uptake in the product line within its dealer base. Foley Mechanical was an early adopter and installed the full product line for its customers.
Eternal refers to its units as hybrid water heaters because they supply continuous hot water like a tankless unit, but have a two-gallon reserve tank built into the heat exchanger so hot water is ready instantly when needed. The patented all stainless steel heat exchanger supports multiple applications simultaneously, is up to 98 percent efficient, and comes with a 15 year residential/5 year commercial no leak warranty. The units also qualify for a $300 federal tax credit in 2013.