BOSCH ES4 Electric Mini-Tank Water Heater: 4-gallon capacity
Say goodbye to waiting around for hot water with the BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4). It's like having a personal hot water butler, but way more compact and it fits right under your sink. Perfect for those 'I need hot water now' moments, this little powerhouse hooks up to a standard 120-volt outlet or plays nice with your existing system.
Here's the scoop on what makes it stand out: a glass-lined tank that keeps heat in like a thermos (but way tougher), and a fast recovery rate because nobody likes waiting. Adjusting the temp is a breeze with the external dial, and you can mount it just about anywhere—wall, shelf, or floor. Plus, it's got a safety valve because, well, safety first.
It's not just smart; it's the right size too: 13.75"W x 13.75"H x 13.5"D and weighs about as much as a big bag of dog food (17.3 lbs, if you're curious).
Ideal for kitchens, bathrooms, or anywhere you're tired of the cold shoulder from your faucet.
Features
- 120-volt outlet compatible
- Glass-lined tank
- Fast recovery rate
- Temperature control dial
- Wall, shelf, or floor mountable
- 4-gallon capacity
General specs
- Brand: BOSCH
- Model: ES4
- Seller: Amazon
- ID: B0148O65IE
- Product Dimensions: 13.75"W x 13.75"H
- Wattage: 1440 watts
- Voltage: 120 Volts
- Maximum Flow Rate: 0.11 Gallons Per Minute
- Maximum Temperature: 140 Degrees Fahrenheit
- Heat Output: 1440 Watts
- efficiency: 98% thermal efficiency
- style: modern
- Maximum Operating Pressure: 150 Pound per Square Inch
- Mounting Type: Wall
- Item Weight: 17.3 pounds
- Country of Origin: USA
- Warranty Description: 6 year warranty on unit, 2 year warranty on parts
- First listed by seller: 5/2/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Price History for seller Amazon
Shipping options
United States
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| Brand | BOSCH | BOSCH | GE | KENUOS | HNK | Rheem |
| Model | ES4 | ES2.5 | GE06P08BAR | SY-15 | D3548A11 | RTEX-24 |
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| Price | $329.61 | $209.65 | $155.10 | $125.99 | $139.98 | $510.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | Dec 6, 2025 | Dec 6, 2025 | Mar 11, 2026 | Mar 11, 2026 | Mar 11, 2026 | Mar 11, 2026 |
| Product Dimensions | 13.75"W x 13.75"H | 13.75"W x 13.75"H | 17.25"W x 17.75"H | 13.5"W x 13.8"H | 9.13"W x 7.59"H | 17.63"W x 18.25"H |
| Wattage | 1440 watts | 1440 watts | 1500 watts | 3500 watts | 24 KW | |
| Voltage | 120 Volts | 120 Volts (DC) | 120 Volts | 120 Volts (AC) | 110 Volts | 240 Volts |
| Maximum Flow Rate | 0.11 Gallons Per Minute | 0.45 Gallons Per Minute | 1.9 Liters Per Minute | 5.9 Gallons Per Minute | ||
| Maximum Temperature | 140 Degrees Fahrenheit | 140 Degrees Fahrenheit | 140 Degrees Fahrenheit | 149 Degrees Fahrenheit | 131 Degrees Fahrenheit | |
| Heat Output | 1440 Watts | 2.5 Gallons | 140 Degrees Fahrenheit | 24 Kilowatts | ||
| efficiency | 98% thermal efficiency | 98% | 95% | 99.8% Energy efficient | ||
| style | modern | Indoor Installation | Water Heater | |||
| Maximum Operating Pressure | 150 Pound per Square Inch | 150 Pound per Square Inch | 108 Pound per Square Inch | 6 Bars | 150 | |
| Mounting Type | Wall | Wall | Wall or Floor | Wall | Wall | Wall |
| Item Weight | 17.3 pounds | 10 pounds | 4.29 pounds | 17.8 pounds | ||
| Country of Origin | USA | China | China | |||
| Warranty Description | 6 year warranty on unit, 2 year warranty on parts | 6 year warranty on unit, 2 year warranty on parts | 8 years replacement warranty | |||
| Special Feature | Adjustable Thermostat | Temperature Lock, Dry Combustion Protection, Overheat Protection, LED Display, Low Water Flow Protection | LED Display | |||
| Is Electric | Yes | Yes | Yes | |||
