What it delivers
The Stiebel Eltron Mini 4 3.5 kW Point-of-Use Tankless Water Heater is a point-of-use electric tankless rated at 3.5 kW on 220 volts. Its listing gives a maximum flow of 0.5 GPM.
Expect about 0.3 GPM with cold winter water (a 70°F rise) and 0.5 GPM when the inlet is milder (45°F rise); that is less than one 2 GPM shower in January. Try your own inlet temperature.
At 220 volts 3.5 kW is about 16 amps. Whether your panel can carry it alongside heating and cooking loads is an electrician's call.
It's meant for a single fixture near the unit: it saves the wait for hot water there rather than heating a whole house.
Listed details: features: Extremely compact design, Proven reliability, Sleek design; model: Mini 4.
The listing gives a weight of 3.4 lb.
Warranty, per the listing: Three year limited warranty - product must be installed by licensed personnel.
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 0.5 GPM
- No venting or gas line
Trade-offs
- Flow drops with cold inlet water
- 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 | Mini 4 | Retailer |
|---|---|---|
| Features (seller) | Extremely compact design, Proven reliability, Sleek design | Retailer |
| Power | 3.5 kW | Retailer |
| Voltage | 220 V | Retailer |
| Max flow (maker) | 0.53 GPM | Retailer |
| Product weight | 3.4 lb | Retailer |
| Warranty | Three year limited warranty - product must be installed by licensed personnel | Retailer |
Rival units at this flow
More point-of-use water heaters rated for similar demand
- WINTEMP WM07V 7 kW Point-of-Use Tankless Water Heater
- VancEpic RE8K 8 kW Point-of-Use Tankless Water Heater
- Eemax HA008240 8 kW Point-of-Use Tankless Water Heater
- EcoSmart ECO 8 Point-of-Use Tankless Water Heater
Full point-of-use water heaters spec grid · Every Stiebel Eltron unit in the catalog
Final verdict
A well-specified point-of-use electric tankless for one sink or a low-flow shower.
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