What it delivers
The WINTEMP WM15V 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.
Worked out from its input, it delivers roughly 2.2 GPM when the water only has to rise 45°F, and 1.4 GPM at a 70°F winter rise: 1 shower at 2 GPM in summer, less than one 2 GPM shower in winter. 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 breakers. The requirement calculator shows it at 208 V too; an electrician confirms the panel.
Electric tankless units need no venting and no gas, and work best where inlet water stays mild, because every degree of rise costs flow.
Other listed details: connections: 1/2" npt; connectivity: WiFi; material: Metal; model: WM15V; warranty: 2 Year.
The listing gives dimensions of 9.3 in (W) x 15 in (H) and a weight of 12.8 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
- Weak at a large winter rise
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 | WM15V | Retailer |
|---|---|---|
| Dimensions (seller) | 9.3"W x 15"H | Retailer |
| Features (seller) | LED Display, Self-Modulating, Smart Home ＆ Tuya Smart Compatible, Temperature Lock, WiFi | Retailer |
| Power | 14.4 kW | Retailer |
| Voltage | 240 V | Retailer |
| Max flow (maker) | 3.5 GPM | Retailer |
| Product weight | 12.8 lb | Retailer |
| Warranty | 2 Year | Retailer |
| Material | Metal | Retailer |
| Amps (maker) | 60 A | Retailer |
| Breakers (maker) | 1 × 60 Amp double-pole breakers | Retailer |
| Connections | 1/2" npt | Retailer |
| Connectivity | WiFi | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
- Rheem RTEX-13 Electric Tankless Water Heater
- Stiebel Eltron DHX 10-2 Trend 9.6 kW Electric Tankless Water Heater
- Westinghouse HEU-ET014KA1G-A2 14 kW Electric Tankless Water Heater
- Atmor AT-905-14TB 14 kW Electric Tankless Water Heater
Full electric tankless water heaters spec grid · Every WINTEMP unit in the catalog
Final verdict
A sensible compact electric tankless for one shower at a time in mild climates.
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