What it delivers
The ThermoMate ET140 14 kW Electric Tankless Water Heater is a compact electric tankless rated at 14 kW on 240 volts. Its listing gives a maximum flow of 3.3 GPM.
At a 45°F rise (mild inlet water to a 120°F set point) it holds about 2.1 GPM, 1 shower at 2 GPM; in winter, at a 70°F rise, about 1.4 GPM, less than one 2 GPM shower. Size it to your fixtures.
At 240 volts 14 kW is about 58 amps (the listing states 58 A). The maker calls for Double Pole 60Amp breaker. A licensed electrician confirms the panel, the service and the wire before it goes in.
It skips venting entirely, but the amps are the hurdle: check the panel before the plumbing.
From the listing: features: Instant Heating, Leakproof and maintenance free heating element; connections: 1/2"npt; material: Alloy Steel; model: ET140.
The listing gives dimensions of 12.83 in (W) x 15.35 in (H) and a weight of 13.7 lb.
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 kW
- Up to 3.3 GPM
- No venting or gas line
- Breakers stated by the maker
Trade-offs
- 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 | ET140 | Retailer |
|---|---|---|
| Dimensions (seller) | 12.83"W x 15.35"H | Retailer |
| Features (seller) | Instant Heating, Leakproof and maintenance free heating element | Retailer |
| Power | 14 kW | Retailer |
| Voltage | 240 V | Retailer |
| Max flow (maker) | 3.3 GPM | Retailer |
| Product weight | 13.7 lb | Retailer |
| Material | Alloy Steel | Retailer |
| Amps (maker) | 58 A | Retailer |
| Breakers (maker) | Double Pole 60Amp breaker | Retailer |
| Connections | 1/2"npt | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
- Westinghouse WET011A0G 11 kW Electric Tankless Water Heater
- Titan N-100 10.8 kW Electric Tankless Water Heater
- Titan N-120S SCR2 11.8 kW Electric Tankless Water Heater
- ThermoMate EH140 14 kW Electric Tankless Water Heater
Full electric tankless water heaters spec grid · Every ThermoMate unit in the catalog
Final verdict
A solid compact electric tankless for one shower at a time in mild climates.
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