Rheem RETEX-36 Performance 36 kw Self-Modulating 6 GPM Electric Tankless Water Heater

An electric tankless water heater converts stated kW into a temperature rise at a given flow, so a cold-climate inlet cuts the usable GPM sharply. Read the kW rating, the 240 V requirement and the amperage the listing states, then have a licensed electrician confirm your panel capacity before you order. Nothing here is an installation instruction.

Exact listing: Rheem RETEX-36 Performance 36 kw Self-Modulating 6 GPM Electric Tankless Water Heater

Listing identifier: B0785TV3HV. View listing source.

Title identifies the seller's listing; it is not an independent performance test. Check the selected configuration, current price and seller on Amazon.

Fuel

Electric — 36 kw Amazon listing title

Stated maximum flow

6 GPM — 6 GPM Amazon listing title

Stated heating power

36 kW — 36 kw Amazon listing title

Compare the stated kW with the output the flow-rate calculator gives for your climate: a cold inlet cuts usable GPM sharply. Have a licensed electrician confirm that your panel and service can carry the amperage this listing states; nothing on this page is wiring guidance.

These notes summarize source research, not hands-on testing. Read our research method.