In these tankless water heater quiet reviews we score four electric tankless heaters, all fan-free, on how quietly they run, how much hot water they deliver, how easy they are to control and what installation they need.
All four were scored on the same criteria using manufacturer specifications and owner feedback. For our shortlist see the best tankless water heater quiet guide; our Editorial Policy explains how we work.
Top 3 Quiet Tankless Heaters From Our Reviews
GE Appliances 18kW Whole Home Electric Tankless with Touch Screen
- Touch screen
- 18kW
- Whole home
NOVIEEX DS-18 27kW 240V Electric Tankless Water Heater
- 27kW
- 7.4 GPM
- Anti-freeze
ThermoMate ET140 14kW 240V Electric Tankless Water Heater
- 14kW
- One circuit
- Low upkeep
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How We Scored Quiet Tankless Heaters
| Criterion | Weight | What we look at |
|---|---|---|
| Noise | 30% | Fan-free design, relay noise |
| Flow | 25% | GPM for the home |
| Controls | 20% | Display, accuracy |
| Install | 15% | Breakers, wiring |
| Upkeep | 10% | Scale protection |
| Water heater | Score | Best for |
|---|---|---|
| GE 18kW | 8.8/10 | Small homes |
| NOVIEEX 27kW | 8.5/10 | Higher demand |
| ThermoMate ET140 | 8.3/10 | 1–2 fixtures |
| EET018 18kW | 8.0/10 | Hard water |
Quiet Tankless Heaters Compared
| # | Product | Key Features | |
|---|---|---|---|
| 1 |  GE Appliances 18kW Whole Home Electric Tankless with Touch Screen |
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| 2 |  NOVIEEX DS-18 27kW 240V Electric Tankless Water Heater |
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| 3 |  ThermoMate ET140 14kW 240V Electric Tankless Water Heater |
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| 4 |  EET018 18kW 240V Electric Tankless Water Heater with Scale Inhibitor |
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1. GE Appliances 18kW Whole Home Electric Tankless with Touch Screen
Highest Overall Score: 8.8/10
- 18kW whole-home electric
- Up to 3.8 GPM, 1 faucet and 2 showers in warm climates
- Digital touch screen temperature control
- Fan-free, quiet
- Warm-climate flow figures
- Large breakers needed
- Power: 18kW, 240V
- Brand: GE Appliances
- Flow: up to 3.8 GPM
GE’s 18kW unit scored highest for quiet operation plus an easy touch screen.
It suits small homes and apartments.
Who the GE 18kW fits best
Small homes.
Who should skip the GE 18kW
Cold-climate large homes.
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2. NOVIEEX DS-18 27kW 240V Electric Tankless Water Heater
Most Flow: 8.5/10
- 27kW, up to 7.4 GPM
- Anti-freeze and low-flow protection
- LED display
- Fan-free
- Very high amp draw
- Newer brand
- Power: 27kW, 240V
- Model: DS-18
- Flow: up to 7.4 GPM
NOVIEEX’s 27kW unit gives the most flow here while staying quiet.
Plan electrical upgrades first.
Who the NOVIEEX 27kW fits best
Higher-demand electric homes.
Who should skip the NOVIEEX 27kW
Limited panels.
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3. ThermoMate ET140 14kW 240V Electric Tankless Water Heater
Best Simple Install: 8.3/10
- 14kW, about 3.3 GPM
- Leakproof, low-maintenance element (per maker)
- Self-modulating
- ETL certified
- 1–2 fixtures
- One shower in cold areas
- Power: 14kW, 240V
- Model: ET140
- Flow: up to 3.3 GPM
ThermoMate’s ET140 is a quiet, simple unit for a small home or apartment.
Its element design limits upkeep.
Who the ThermoMate ET140 fits best
Apartments.
Who should skip the ThermoMate ET140
Large homes.
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4. EET018 18kW 240V Electric Tankless Water Heater with Scale Inhibitor
Best for Hard Water: 8.0/10
- Included inlet scale inhibitor
- 18kW self-modulating
- Temperature memory, LED display
- Overheat protection
- Little-known brand
- Cartridge replacements
- Power: 18kW, 240V
- Model: EET018
- Install: hardwired
The EET018 includes a scale inhibitor that protects its heating core in hard water.
It runs quietly like other electric units.
Who the EET018 18kW fits best
Hard water areas.
Who should skip the EET018 18kW
Owners wanting a known brand.
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Quiet Installation Tips
- Mount on a solid wall.
- Use proper pipe supports to avoid water hammer.
- Choose electric for the quietest operation.
- Keep the unit accessible for service.
Frequently Asked Questions
Which quiet tankless heater scored highest?
The GE 18kW scored 8.8/10.
Do electric tankless heaters make noise?
Only faint relay clicks.
Is a 27kW unit louder?
No; electric units stay quiet at any size.
Can quiet units serve a whole house?
In warm climates with enough power, yes.
Final Verdict: Tankless Water Heater Quiet Reviews
The GE 18kW is the best quiet tankless heater we scored. The NOVIEEX 27kW offers the most flow, and the ThermoMate ET140 is the simplest install.
Overall: GE Appliances 18kW Whole Home Electric Tankless with Touch Screen Check Latest Price
Most flow: NOVIEEX DS-18 27kW 240V Electric Tankless Water Heater Check Latest Price
Simple install: ThermoMate ET140 14kW 240V Electric Tankless Water Heater Check Latest Price
Quiet heat for every corner of the home.
Looking for something else? Browse all of our Water Heaters guides and the wider Heating & Cooling section.
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