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.
- 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
- product_dimensions: 13.75"W x 13.75"H
- color: White
- 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.
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Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
BOSCH ES4 4-gallon capacity
|
BOSCH ES2.5 2.5 gallon point-of-use mini-tank
|
EcoSmart ECO 11
|
GE GE06P08BAR Compact design for limited spaces
|
Rheem RTEX-24
|
Mini Instant Smart Water Heater White 5500W power
|
|
| Brand | BOSCH | BOSCH | EcoSmart | GE | Rheem | Modern Home Furnishing |
| Model | ES4 | ES2.5 | ECO 11 | GE06P08BAR | RTEX-24 | |
| Color |
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| Rating |
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| Price | $239.00 | $204.95 | $203.11 | $209.10 | $498.99 | $115.11 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Joom |
| Update | June 27, 2025 | August 5, 2025 | August 5, 2025 | June 27, 2025 | June 27, 2025 | August 13, 2025 |
| product_dimensions | 13.75"W x 13.75"H | 13.75"W x 13.75"H | 17.25"W x 17.75"H | 17.63"W x 18.25"H | ||
| wattage | 1440 watts | 1440 watts | 24 KW | |||
| voltage | 120 Volts | 120 Volts (DC) | 120 Volts | 240 Volts | ||
| maximum_temperature | 140 Degrees Fahrenheit | 140 Degrees Fahrenheit | 140 Degrees Fahrenheit | |||
| heat_output | 1440 Watts | 2.5 Gallons | 140 Degrees Fahrenheit | 24 Kilowatts | ||
| efficiency | 98% thermal efficiency | 98% | 99.8% Energy efficient | |||
| style | modern | Indoor Installation | Water Heater | |||
| maximum_operating_pressure | 150 Pound per Square Inch | 150 Pound per Square Inch | 150 | |||
| mounting_type | Wall | Wall | Wall or Floor | Wall | ||
| 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 | |||
Electric Mini-Tank Water Heater
William J.
Dallas, TX
May 11, 2025
I was expecting a decent upgrade from my old water heater, which took forever to warm up and was bulky. The reality is this thing delivers hot water in no time, and it's compact enough to tuck away neatly. Compared to what I used before, it's a huge improvement in speed and space-saving. Most likely, it's perfect for small households or spot use, and I love how reliable it feels. :)
- Pros: The hot water is ready almost instantly, which is super convenient for quick tasks like washing hands or doing dishes. It fits perfectly under my sink and was easy to hook up to my existing setup without any fuss. The temperature control is straightforward with a simple dial, and it feels very sturdy and safe to use.
- Cons: It doesn't hold a huge amount of water, so for bigger jobs like filling a tub, it might not be enough and could run out quickly. The initial cost is a bit high compared to some other options out there.