Eternal GU100 is an affordable and flexible alternative to traditional tank water heaters in retrofit applications.
The Eternal GU100 is an affordable and flexible alternative to traditional tank water heaters in retrofit applications. The hybrid model features endless hot water, while a small reserve tank inside the unit maintains water pressure and avoids temperature fluctuations. The unit is 96% thermal efficient, has a lightweight compact design, 1/2” gas line capability, top-mounted water connections, and uses 3” PVC venting. The GU100 can replace a traditional 50-gal. standard tank, is compatible with most recirculation systems to deliver instant hot water and comes with a 15-year residential no-leak warranty.