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Rheem retex-27 performance 27 kw self-modulating 5.3 gpm electric .
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Rheem Retex-27 5.3 GPM 27 kw Self-Modulating Performance Tankless
Rheem RETEX-27 Performance 27 kw Self-Modulating 5.3 GPM Electric
How to wire Tankless electric water heater