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Written from the listing's specs, not from our own use · How we rate
The HNK 3,500 W Electric (110V) is a no-fuss point-of-use heater, made for an electric home that wants rid of its tank. We rate it 6.7/10 from its documented specs.
| Brand | HNK |
|---|---|
| Category | Electric tankless water heaters |
| Fuel | Electric |
| Stated mounting location | Indoor / outdoor |
| Stated voltage | 110 V |
| ASIN | B0DNVW6M1T |
Full listing title: Tankless Water Heater Electric ，110v 0-3500W Whole House Tankless Hot Water Heater with Led Temperature Display for Indoor or Outdoor Black-5 Years Quality Assurance
| Fuel | ElectricFull listing title |
|---|---|
| Stated mounting location | Outdoor / IndoorFull listing title |
| Stated voltage | 110vFull listing title |
Rated from the listing's specs, no buyer reviews yet
What it's made for: an electric home that wants rid of its tank.
Two electric tankless heaters close to it on our rating, each with a dated price.
On Sep 30, 2026, that price put it in the cheaper third of the 19 point-of-use heaters we have a recent price for.
Add the circuit to the budget if it doesn't plug in, and an hour of plumbing under the sink.
The button opens the exact listing (ASIN B0DNVW6M1T), where today's price, stock and seller apply.
Want the shower covered too? The Rheem 18 kW Electric, 240V (9.3/10) is an 18 kW whole-house unit.
Want it to draw only what it needs? The ThermoMate 14 kW Electric, 240V (7.9/10) is self-modulating, per its listing.
Want to spend less? The xwdzswgs 3,000 W Under-Sink, 110V (7.0/10) was listed at $59.98 on Sep 30, 2026.
Our take
The HNK 3,500 W Electric (110V) keeps its spec sheet short, which suits an electric home that wants rid of its tank. No buyer has reviewed it yet, so our 6.7/10 comes from the spec sheet alone. Honestly, the catch: no word on the heating power or the breakers it needs. We'd pick it if you want a point-of-use heater for an electric home that wants rid of its tank; otherwise, put it next to the Stiebel Eltron DHX 12-2 Trend (12 kW) first.
the unit on the wall next to the old tank's spot, water in and out. Under a sink or on the wall beside it, close to the tap it feeds.
Hot in a few seconds once the water in the pipes has passed. Set it, then leave it.
Colder inlet water means less hot flow from the same power. Low-flow shower heads stretch it further.
Clean the inlet screen and flush out scale on hard water. Our flushing and descaling guide has the routine.
Before the HNK 3,500 W Electric (110V) goes in your cart, check the tap it will feed: it is a small unit, made for one fixture.
Decide the fixture first, then check the flow it needs. Our point-of-use guide explains the trade-off.
It runs on 110 V. A dedicated outlet or circuit may still be needed; an electrician confirms the breaker and the wire.
Small units need a minimum flow to switch on. Ask the seller for that figure if you have low-flow aerators.
Electric units scale too, mostly at the inlet screen and the element. Our flushing and descaling guide covers the routine.
How the HNK 3,500 W Electric (110V) stacks up against the closest alternative, the Stiebel Eltron DHX 12-2 Trend (12 kW).
| Criterion | HNK 3,500 W Electric, 110V | Stiebel Eltron DHX 12-2 Trend, 12 kW |
|---|---|---|
| Our rating | 6.7/10 | 6.8/10 |
| Heating power | Not stated | 12 kW |
| Voltage | 110 V | 240 V |
| Self-modulating | Not stated | Stated |
Pick the Stiebel Eltron DHX 12-2 Trend (12 kW) if you want our higher-rated option (6.8/10), with more power (12 kW) and self-modulating power.
We rate it 6.7/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.
The listing states 110 V. A licensed electrician checks the panel, the breakers and the wiring before it goes on the wall.
Which tap: decide the fixture first, then check the flow it needs. Our point-of-use guide explains the trade-off. Power: it runs on 110 V. A dedicated outlet or circuit may still be needed; an electrician confirms the breaker and the wire. Activation flow: small units need a minimum flow to switch on. Ask the seller for that figure if you have low-flow aerators. Scale: electric units scale too, mostly at the inlet screen and the element. Our flushing and descaling guide covers the routine.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula.