What it delivers
The GE GE18SNHPDG 18 kW Electric Tankless Water Heater is a whole-house electric tankless rated at 18 kW on 240 volts. Its listing gives a maximum flow of 3.8 GPM.
Worked out from its input, it delivers roughly 2.7 GPM when the water only has to rise 45°F, and 1.8 GPM at a 70°F winter rise: 1 shower at 2 GPM in summer, less than one 2 GPM shower in winter. Check your house in the planner.
At 240 volts 18 kW is about 75 amps. A licensed electrician confirms the panel, the service and the wire before it goes in.
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: features: Energy Efficient; material: Stainless Steel; model: GE18SNHPDG; warranty: 5 years replacement warranty.
Warranty, per the listing: 5 years replacement warranty.
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
- 18 kW
- Up to 3.8 GPM
- No venting or gas line
Trade-offs
- Draws about 75 A
- 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 | GE18SNHPDG | Retailer |
|---|---|---|
| Features (seller) | Energy Efficient | Retailer |
| Power | 18 kW | Retailer |
| Voltage | 240 V | Retailer |
| Max flow (maker) | 3.8 GPM | Retailer |
| Material | Stainless Steel | Retailer |
| Warranty | 5 years replacement warranty | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
Final verdict
A sensible whole-house electric tankless for one shower at a time in mild climates.
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