What it delivers
The Atmor AT-905-14TB 14 kW Electric Tankless Water Heater is a compact electric tankless rated at 14 kW on 240 volts.
Worked out from its input, it delivers roughly 2.1 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. Check your house in the planner.
At 240 volts 14 kW is about 58 amps. 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: model: AT-905-14TB; warranty: 2 year manufacturer, 7 year against leaks.
The listing gives a weight of 4.7 lb and instruction manual, thermoboost in the box.
Warranty, per the listing: 2 year manufacturer, 7 year against leaks.
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
- 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 | AT-905-14TB | Retailer |
|---|---|---|
| Power | 14 kW | Retailer |
| Voltage | 240 V | Retailer |
| Product weight | 4.7 lb | Retailer |
| Warranty | 2 year manufacturer, 7 year against leaks | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
Final verdict
A sensible compact electric tankless for one shower at a time in mild climates.
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