Marco,
We are sorry to hear about your frustrating experience with your new water heater. It must have been quite a hassle to deal with leaks and the additional costs and effort of reinstalling the unit.
This model is generally appreciated for its efficiency and compliance with Ultra Low NOx emissions standards. However, your experience highlights significant quality control issues and the inconvenience of dealing with returns and replacements. If you need additional assistance with your water heater, please call 866-279-4566 between the hours of 7 A.M. and 7 P.M. CST
Derius