KENUOS SY-15 Under Sink Instant Hot Water Heater: Upgraded pressure relief valve
Ever waited forever for hot water? The KENUOS 4 Gallon Under Sink Instant Hot Water Heater says, "Not on my watch." It’s all about getting you hot water in a snap—think 5 to 10 minutes—without the energy guilt, thanks to a whopping 95% thermal efficiency. And that polyurethane CFC-free filling? That’s like wrapping your water in a cozy, insulating blanket.
Here’s the lowdown on what makes this heater a champ:
- You call the shots on temperature, dialing it anywhere from a cozy 86°F to a steamy 149°F.
- Safety first, right? That’s why there’s an upgraded pressure relief valve that’s got your back.
- Durability? Check. The stainless steel tank is built like a tank (because it is one).
- Overheat protection and a leakproof design mean it’s smart enough to not throw a tantrum.
- And yes, that cord is UL certified—because we’re not about to cut corners on safety.
Whether it’s your kitchen, bathroom, or even your home on wheels, this heater’s flexible installation options mean it’ll fit right in. Literally.
Features
- Adjustable temperature control
- Fast heating with 95% efficiency
- Durable stainless steel tank
- Safety features including overheat protection
- Upgraded pressure relief valve
General specs
- Brand: KENUOS
- Model: SY-15
- Seller: Amazon
- ID: B0DM5WW54Q
- product_dimensions: 13.5"W x 13.8"H
- wattage: 1500 watts
- voltage: 120 Volts (AC)
- maximum_flow_rate: 0.45 Gallons Per Minute
- maximum_temperature: 149 Degrees Fahrenheit
- efficiency: 95%
- maximum_operating_pressure: 108 Pound per Square Inch
- mounting_type: Wall
- item_weight: 10 pounds
- country_of_origin: China
- First listed by seller: 6/5/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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$125.99
$129.99
Last price update: 12/6/25
Available to order
Price History for seller Amazon
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Delivery to 
United States
United States
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Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
KENUOS SY-15 Upgraded pressure relief valve
|
HNK D3548A11 Instant hot water heating
|
Instantaneous Electric Water Heater Rapid heating
|
Mini Kitchen Rapid Water Heater Instantaneous heating
|
Rinnai V53DeP Endless hot water flow
|
Rheem RTEX-13 External adjustable digital thermostatic control
|
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| Brand | KENUOS | HNK | Rinnai | Rheem | ||
| Model | SY-15 | D3548A11 | V53DeP | RTEX-13 | ||
| Color | ||||||
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| Price | $125.99 | $139.98 | $83.48 | $58.99 | $741.65 | $287.20 |
| Seller | Amazon | Amazon | Gshopper | Gshopper | Amazon | Amazon |
| Update | December 6, 2025 | December 6, 2025 | July 25, 2024 | July 25, 2024 | December 6, 2025 | December 6, 2025 |
| product_dimensions | 13.5"W x 13.8"H | 9.13"W x 7.59"H | 13"W x 30"H | 1"W x 1"H | ||
| wattage | 1500 watts | 3500 watts | 13 KW | |||
| voltage | 120 Volts (AC) | 110 Volts | 240 Volts | |||
| maximum_flow_rate | 0.45 Gallons Per Minute | 1.9 Liters Per Minute | 5.3 Gallons Per Minute | 4.8 Gallons Per Minute | ||
| maximum_temperature | 149 Degrees Fahrenheit | 131 Degrees Fahrenheit | 1.4E+2 Degrees Fahrenheit | |||
| efficiency | 95% | High | at least 99.8% energy efficient | |||
| mounting_type | Wall | Wall | Wall | Wall | ||
| item_weight | 10 pounds | 4.29 pounds | 33 pounds | 3.96 pounds | ||
| is_electric | Yes | No | Yes | |||
| included_components | tankless electric water heater | Water Heater | Rheem RTEX-13 Residential Tankless Water Heater | |||
Under Sink Instant Hot Water Heater
$125.99
