Gas tankless water heaters have a combustion fan that you can hear when hot water runs, which matters if the unit sits next to a bedroom, office or living area. Electric tankless heaters have no burner and no fan, so they are close to silent; you may hear only a faint click of the relays. These four electric models are the best quiet picks.
We compared power, flow, controls and installation needs using manufacturer specifications and owner feedback. For scored reviews see tankless water heater quiet reviews, or see the best tankless water heater guide; our Editorial Policy explains our process.
Top 3 Best Quiet Tankless Water Heaters
Mount Steel Pioneer MST-TLS18A 12–18kW Adjustable Electric Tankless
- Fan-free
- 12–18kW
- Low scale
APUS AP-ADSK180-H18 18kW 240V Electric Tankless Water Heater
- 18kW
- 4.4 GPM
- Stable temp
WINTEMP WN11 11kW 240V Electric Tankless Water Heater
- 11kW
- Under-sink
- Temp lock
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Quiet Tankless Water Heaters Compared
| # | Product | Key Features | |
|---|---|---|---|
| 1 |  Mount Steel Pioneer MST-TLS18A 12–18kW Adjustable Electric Tankless |
| Check Latest Price |
| 2 |  APUS AP-ADSK180-H18 18kW 240V Electric Tankless Water Heater |
| Check Latest Price |
| 3 |  Senville 13kW 240V Electric Tankless Water Heater |
| Check Latest Price |
| 4 |  WINTEMP WN11 11kW 240V Electric Tankless Water Heater |
| Check Latest Price |
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1. Mount Steel Pioneer MST-TLS18A 12–18kW Adjustable Electric Tankless
Best Overall
- No burner or fan, near-silent
- Adjustable 12–18kW to match your panel
- Dry-heating design reduces mineral buildup (per maker)
- Self-modulating, 99% efficiency (per maker)
- 240V hardwire
- Flow depends on chosen power level
- Power: 12–18kW, 240V
- Model: MST-TLS18A
- Install: indoor
Mount Steel’s Pioneer lets you set peak power to what your electrical panel can handle, which is rare.
It runs quietly beside living spaces.
Who the Mount Steel 12–18kW fits best
Homes near bedrooms or offices.
Who should skip the Mount Steel 12–18kW
Homes needing high flow in winter.
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2. APUS AP-ADSK180-H18 18kW 240V Electric Tankless Water Heater
Best Flow
- 18kW, up to 4.4 GPM for 2–3 points
- ±1°F temperature control
- Water and electricity separated (per maker)
- Two 40A breakers, 8 AWG
- Newer brand
- About 75A draw
- Power: 18kW, 240V
- Model: AP-ADSK180-H18
- Flow: up to 4.4 GPM
APUS’s 18kW unit is quiet and strong enough for a shower plus a sink.
It holds temperature tightly.
Who the APUS 18kW electric fits best
Condos and small homes.
Who should skip the APUS 18kW electric
Large households.
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3. Senville 13kW 240V Electric Tankless Water Heater
Best Mid-Size
- 13kW self-modulating
- Compact, quiet electric heat
- Residential and light commercial use
- Limited listing specs
- One main fixture
- Power: 13kW, 240V
- Brand: Senville
- Install: indoor
Senville’s 13kW unit is a quiet choice for a bathroom or small apartment.
Check wiring needs with an electrician.
Who the Senville 13kW fits best
Single bathrooms.
Who should skip the Senville 13kW
Whole-house use.
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4. WINTEMP WN11 11kW 240V Electric Tankless Water Heater
Best Compact
- 11kW, up to 2.6 GPM
- Fits under a sink
- Temperature lock
- Overheat protection, ETL
- 46A draw
- One shower or sink
- Power: 11kW, 240V
- Model: WN11
- Flow: up to 2.6 GPM
WINTEMP’s WN11 is small enough for a vanity cabinet and makes almost no noise.
Temperature lock prevents accidental changes.
Who the WINTEMP WN11 fits best
Ensuites and offices.
Who should skip the WINTEMP WN11
Whole-house needs.
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Why Electric Tankless Is Quieter
- No burner or combustion fan.
- No vent noise.
- Relays may click softly when power changes.
- Mount on solid walls to avoid pipe hum.
Frequently Asked Questions
What is the quietest tankless water heater?
Electric models, such as the Mount Steel 12–18kW.
Are gas tankless heaters noisy?
They have a fan you can hear while running.
Can I install an electric unit near a bedroom?
Yes, they are close to silent.
Do quiet units heat less?
No; noise depends on design, not output.
Final Verdict: Best Tankless Water Heater Quiet
The Mount Steel 12–18kW is the best quiet tankless water heater. The APUS 18kW has the best flow, and the WINTEMP WN11 is the best compact choice.
Overall: Mount Steel Pioneer MST-TLS18A 12–18kW Adjustable Electric Tankless Check Latest Price
Flow: APUS AP-ADSK180-H18 18kW 240V Electric Tankless Water Heater Check Latest Price
Compact: WINTEMP WN11 11kW 240V Electric Tankless Water Heater Check Latest Price
Hot water without the hum.
Looking for something else? Browse all of our Water Heaters guides and the wider Heating & Cooling section.
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