The RED NUMBERS on the chart below indicate a heater that will heat more than 2.5 Gallon per minute in the specific geographic zone. This meets our minimum requirement to be a satisfactory solution for a customer. If the heater will not do more than 2.5 G.P.M. at your normal water temperature we do not recommend buying the product for a whole house application. Still need help? Feel free to contact us.

Tankless Inc. 2040-A Whitfield Park Avenue, Sarasota, Florida, USA 34243 - Phone: 1-800-TANKLESS 1-800-826-5537