What it delivers
The Rheem RTEX-04T 3.5 kW Point-of-Use Tankless Water Heater is a point-of-use electric tankless rated at 3.5 kW on 120 volts. Its listing gives a maximum flow of 0.9 GPM.
Worked out from its input, it delivers roughly 0.5 GPM when the water only has to rise 45°F, and 0.3 GPM at a 70°F winter rise: less than one 2 GPM shower in summer, less than one 2 GPM shower in winter. Check your house in the planner.
At 120 volts 3.5 kW is about 29 amps. A licensed electrician confirms the panel, the service and the wire before it goes in.
Small units like this suit one sink or a low-flow shower close by; at a kitchen sink's 1.5 GPM the water won't rise as far.
Other listed details: features: [IN] Space-saving Design, Energy-saving; material: Stainless Steel; model: RTEX-04T.
The listing gives dimensions of 10.88 in (W) x 5.88 in (H) and a weight of 4 lb.
Right unit for this house?
Install it when
- One sink or a low-flow shower
- A far bathroom with a long wait for hot water
Look at another unit when
- Whole-house hot water
- Kitchen sinks at full flow in cold climates
Strengths and trade-offs
Strengths
- 3.5 kW
- Up to 0.9 GPM
- No venting or gas line
Trade-offs
- Weak at a large winter rise
- Breaker needs not stated
Install limits
- Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.
Rated performance
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Model number | RTEX-04T | Retailer |
|---|---|---|
| Tank | 0.9 gal | Retailer |
| Dimensions (seller) | 10.88"W x 5.88"H | Retailer |
| Features (seller) | [IN] Space-saving Design, Energy-saving | Retailer |
| Power | 3.5 kW | Retailer |
| Voltage | 120 V | Retailer |
| Max flow (maker) | 0.9 GPM | Retailer |
| Product weight | 4 lb | Retailer |
| Material | Stainless Steel | Retailer |
Rival units at this flow
More point-of-use water heaters rated for similar demand
- Stiebel Eltron DHC 3-2 3.3 kW Point-of-Use Tankless Water Heater
- ThermoMate ET080 8 kW Point-of-Use Tankless Water Heater
- LECLOC C3000 3 kW Point-of-Use Tankless Water Heater
- Stiebel Eltron DHC 4-2 Classic 3.8 kW Point-of-Use Tankless Water Heater
Full point-of-use water heaters spec grid · Every Rheem unit in the catalog
Final verdict
A sensible point-of-use electric tankless for one sink or a low-flow shower.
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