The Eccotemp Mini Tank 4.0 water heater is a Point-of-Use mini tank water heater with a holding tank capible of holding 4.0 gallons that is designed to supply instant hot water on demand to any faucet without long hot water pipe runs or to supply a stand alone sink or faucet instantaneous hot water without wait. It can be used in most under the counter, point of use applications. The EM-4.0 is designed to supply hot water for all hand wash and kitchen sinks in a residential, commercial or industrial environment. The EM-4.0 can replace traditional central hot water heaters thereby conserving water and reducing energy waste. The EM-4.0 can also be plumbed in series with the central water heater and act as a booster. It is lightweight and compact and manufactured for easy installation. It can be mounted on the wall with the included hardware or freestanding.