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The Rheem RTEX-27 is a 27 kW tankless electric water heater for indoor use. It runs on 240 V and uses three heating elements to heat water on demand, up to a rated 6.6 GPM, with digital temperature control and 99.8% energy efficiency. It is compact enough to mount under a sink or counter, so it suits single points of use or a small home, RV or mobile home. Against gas tankless units it needs no venting, but its 27 kW draw requires heavy dedicated electrical service, which is the main limit for most houses.
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Owners of Rheem RTEX models generally report steady, endless hot water for a single fixture or small apartment and like the small footprint. The recurring complaint is the electrical demand: installers and owners note the heavy circuits and panel upgrades the 27 kW unit requires.
The Rheem RTEX-27 is a tankless electric water heater that heats water on demand and delivers continuous hot water. It is designed for indoor use and has three heating elements. It runs on 240 volts.
It can serve a single point of use or multiple applications, including homes, RVs, and mobile homes. The compact design fits under sinks and counters. Digital temperature control allows precise adjustments.
