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BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

Q: When this heater is connected to the hot water line, what happens with the cold water that was sitting in the pipes?

The cold water in the line is UPstream of the heater. It mixes with the hot water in the tank which means the hot water at the faucet will eventually start dropping. Before that happens, one of two things should happen. The heater in this unit will kick on to compensate and/or, the hot water from your main tank will get to this heater and flow thru with little discernable drop in supplied water temp.

Q: Can be used "in-line with a large hot water source"? Would it help a large bathtub that runs out of hot water before it gets full from main tank?

If your bathtub is bigger than your main heater tank, this unit isn't going to do much for you. It will add 2.5, 4, or 7 gallons to the capacity of your main tank, depending on which Bosch unit you buy. The 7 gallon unit requires a specially wired circuit. You will also get a little bit of lukewarm water that was in the line between your main heater and the Bosch unit. Unless your main tank is awfully small and your bathtub massive, the 4 gallon unit should work for you. Maybe a demand type thankless heater in your bathtub hot water feed would be a better choice, but be careful to size it properly for your desired flow rate and temperature rise. Also a tankless is likely to require special wiring.

Q: would this be able to supply a shower?

A standard flow shower head is around 2.5 gallons per minute. A low flow head is around 1.5 gallons per minute. The recovery rate for a 90 degree temperature rise is 6.8 gallons per hour! So even the 7.5 gallon unit would only provide 4 minutes of shower time before the temp dropped off dramatically. (even at the low flow rate..)

Q: Is it necessary to connect an expansion tank to this heater (for safety purposes)? It states something to that effect in the user manual??

If your building already has another water heater with an expansion tank on the same cold water lines, then you do not need a second expansion tank. Most houses today have a back flow preventive valve at the entry to the house. If that is the case (and it should be!), you will need a small expansion tank - the smallest one made should be enough. For the low price and easy installation, why not do it right? If this is to be used in an RV that does not have a back flow preventor, then no expansion tank would be needed (a rubber feed hose/line to the RV would also act as sort of an expansion feature if the spigot has back flow prevention).

4.2/5

ID del producto: 20354825

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Detalles

Brand
Bosch
Product Dimensions
13.75"W x
Special Feature
Lightweight
Color
White
Wattage
1440 watts

⚡1440W fast heat

💧4-gallon mini tank

🛠️98% thermal efficiency

Descripción

🔥 Hot water, right where you want it — no compromises! 💧

COMPACT POWERHOUSE - Sleek 4-gallon mini-tank fits discreetly under your sink or mounts anywhere—wall, shelf, or floor.
ENERGY SMART DURABLE - Premium glass-lined tank with 98% thermal efficiency ensures long-lasting performance and lower energy bills.
PLUG PLAY CONVENIENCE - Easy 120V plug-in setup or inline installation for flexible, independent operation wherever you need it.
SAFETY STYLE COMBINED - Modern design with temperature control dial and pressure relief valve for peace of mind and seamless integration.
INSTANT HOT WATER ZERO WAIT - Fast recovery rate delivers hot water on demand, eliminating long waits at your sink.

The Bosch Tronic 3000 T ES4 is a 4-gallon electric mini-tank water heater designed for point-of-use convenience. With a powerful 1440W heating element and 98% thermal efficiency, it delivers fast, reliable hot water directly at your sink. Its compact size and versatile mounting options make it perfect for modern homes seeking energy-efficient, on-demand hot water without the wait. Backed by a 6-year warranty, it combines durability, safety, and sleek design for a seamless upgrade to your daily routine.

Presupuesto

Brand	Bosch
Product Dimensions	13.75"W x 13.75"H
Special Feature	Lightweight
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
Maximum Pressure	150 Bars
Mounting Type	Wall
Is Electric	Yes
Manufacturer	Bosch Thermotechnology Corporation
Item Depth	13.5 inches
UPC	525751203314 052575049977
Global Trade Identification Number	00052575049977
Part Number	7738004997
Item Weight	17.3 pounds
Item model number	ES4
Is Discontinued By Manufacturer	No
Size	4 Gallon
Pattern	Water Heater
Item Package Quantity	1
Special Features	Lightweight
Included Components	Rough Plumbing;Parts and Repair;water-heaters
Batteries Included?	No
Batteries Required?	No
Warranty Description	6 year warranty on unit, 2 year warranty on parts

¿Tienes una pregunta? Mira lo que otros preguntaron

When this heater is connected to the hot water line, what happens with the cold water that was sitting in the pipes?

Can be used "in-line with a large hot water source"? Would it help a large bathtub that runs out of hot water before it gets full from main tank?

would this be able to supply a shower?

Is it necessary to connect an expansion tank to this heater (for safety purposes)? It states something to that effect in the user manual??

Trustpilot

Trustscore 4.5 | Más de 7,300 reseñas

Rajesh P.

El servicio al cliente fue excelente cuando tuve preguntas sobre el producto.

Hace 2 días

Farhan Q.

El tiempo de entrega fue excelente y el embalaje fue seguro.

Hace 2 meses

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Trustpilot

Trustscore 4.5 | Más de 7,300 reseñas

Anjali K.

La calidad del producto es excelente. Exactamente lo que necesitaba para mi trabajo.

Hace 1 mes

Por Ravi S.

Me encantó la variedad de productos disponibles. Definitivamente volveré a comprar.