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The Rheem RTEX-27 is a whole-home tankless electric water heater rated for up to 6 GPM. It heats water on demand with copper immersion elements and holds temperature within about 1°F through external digital controls from 80°F to 140°F. It suits homes with enough electrical capacity that want endless hot water without a tank. Against gas tankless units it is simpler to vent-free install, but it draws heavy current and needs a large dedicated circuit.
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The Rheem RTEX-27 Professional Classic is an electric tankless water heater. It heats water on demand, so hot water doesn't run out. It can serve a single point of use or several applications, up to 6 GPM for a whole home.
It has an external digital thermostatic control with an LED display and +/- 1 degree accuracy. Temperature can be set in 1°F increments from 80°F to 140°F. The unit self-modulates, adjusting its power to match hot water demand. It is 99.8% energy efficient.
The copper immersion heating elements have a brass top and are threaded, so they can be serviced in the field and replaced easily. The water connections are 3/4" NPT on the bottom of the unit.
