What it delivers
The WINTEMP WM15 14.4 kW Electric Tankless Water Heater is a compact electric tankless rated at 14.4 kW on 240 volts. Its listing gives a maximum flow of 3.5 GPM.
Expect about 1.4 GPM with cold winter water (a 70°F rise) and 2.2 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 240 volts 14.4 kW is about 60 amps (the listing states 60 A). The maker calls for 1 × 60 Amp double-pole breaker. Whether your panel can carry it alongside heating and cooking loads is an electrician's call.
It skips venting entirely, but the amps are the hurdle: check the panel before the plumbing.
Listed details: connections: 1/2" npt; connectivity: WiFi; material: Metal; model: WM15; warranty: 2 Year.
The listing gives dimensions of 8.1 in (W) x 12.2 in (H) and a weight of 10.1 lb.
Warranty, per the listing: 2 Year.
Right unit for this house?
Install it when
- One shower at a time in mild climates
- Homes with no gas service
Look at another unit when
- Panels without spare capacity
- More than 1 shower at once in cold winters
Strengths and trade-offs
Strengths
- 14.4 kW
- Up to 3.5 GPM
- No venting or gas line
- Breakers stated by the maker
Trade-offs
- Draws about 60 A
- Flow drops with cold inlet water
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 | WM15 | Retailer |
|---|---|---|
| Dimensions (seller) | 8.1"W x 12.2"H | Retailer |
| Features (seller) | LED Display, Smart Home ＆ Tuya Smart Compatible, Temperature Lock, Wifi Control | Retailer |
| Power | 14.4 kW | Retailer |
| Voltage | 240 V | Retailer |
| Max flow (maker) | 3.5 GPM | Retailer |
| Product weight | 10.1 lb | Retailer |
| Material | Metal | Retailer |
| Warranty | 2 Year | Retailer |
| Amps (maker) | 60 A | Retailer |
| Breakers (maker) | 1 × 60 Amp double-pole breaker | Retailer |
| Connections | 1/2" npt | Retailer |
| Connectivity | WiFi | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
- Electrolux 11-2 11 kW Electric Tankless Water Heater
- Stiebel Eltron DHX 12-2 Trend 12 kW Electric Tankless Water Heater
- Rheem RTEX-11 Electric Tankless Water Heater
- Rheem RTEX-13 Electric Tankless Water Heater
Full electric tankless water heaters spec grid · Every WINTEMP unit in the catalog
Final verdict
A well-specified compact electric tankless for one shower at a time in mild climates.
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