If you are looking for efficiency, safety, reliability, and hygiene, then this hybrid water heater, called Eternal hybrid, from GrandHall is really an answer for everything. Really impressive is its patented counter-flow design and multi-pass heat exchanger technology that upholds an 86 percent thermal efficiency rating with constant pressure. Still, this thermal heater is provided with multi-stage safety features to protect against hazards like cold shock, scalding or overheating. Grand Hall is offering it with a 20 year No-Leak Warranty on the stainless steel heat exchanger tank, a Limited Three Year Warranty on all other parts, and One Year Warranty on realistic labor for the unit. Above all, it deserves that eco-friendly tag for disposing off near zero greenhouse gas emissions, 5ppm NO (Nitrous Oxide), and it is the cleanest burning appliance.