What it delivers
The HNK D3548A11 3.5 kW Point-of-Use Tankless Water Heater is a point-of-use electric tankless rated at 3.5 kW on 110 volts. Its listing gives a maximum flow of 1.9 GPM.
At a 45°F rise (mild inlet water to a 120°F set point) it holds about 0.5 GPM, less than one 2 GPM shower; in winter, at a 70°F rise, about 0.3 GPM, less than one 2 GPM shower. Check your house in the planner.
At 110 volts 3.5 kW is about 32 amps. The requirement calculator shows it at 208 V too; an electrician confirms the panel.
Point-of-use units go under or beside one sink, where a short pipe run means hot water in seconds.
From the listing: material: Acrylonitrile Butadiene Styrene, Glass; model: D3548A11.
The listing gives dimensions of 9.13 in (W) x 7.59 in (H).
Right unit for this house?
Install it when
- One sink or a low-flow shower
- A far bathroom with a long wait for hot water
Look at another unit when
- Whole-house hot water
- Kitchen sinks at full flow in cold climates
Strengths and trade-offs
Strengths
- 3.5 kW
- Up to 1.9 GPM
- No venting or gas line
Trade-offs
- 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 | D3548A11 | Retailer |
|---|---|---|
| Dimensions (seller) | 9.13"W x 7.59"H | Retailer |
| Features (seller) | Dry Combustion Protection, LED Display, Low Water Flow Protection, Overheat Protection, Temperature Lock Dry Combustion Protection, LED Display, Low Water Flow Protection, Overheat Protection, Temperature Lock | Retailer |
| Power | 3.5 kW | Retailer |
| Voltage | 110 V | Retailer |
| Max flow (maker) | 1.9 liters per minute | Retailer |
| Material | Acrylonitrile Butadiene Styrene, Glass | Retailer |
Rival units at this flow
More point-of-use water heaters rated for similar demand
Final verdict
A solid point-of-use electric tankless for one sink or a low-flow shower.
Buy this unit
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