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BoschElectric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

BoschElectric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - 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

Product ID: 20354826

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Details

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

⚡1440W fast heating power

💧2.5-gallon compact capacity

🔌120V plug & play installation

Description

🔥 Hot water, no wait — upgrade your space with Bosch efficiency!

PLUG PLAY INSTALLATION - 36-inch power cord fits standard outlets for hassle-free setup anywhere.
VERSATILE MOUNTING OPTIONS - Shelf, wall, or floor mount with included bracket for seamless integration.
INSTANT HOT WATER ZERO WAIT - Say goodbye to cold water delays with on-demand heating right at your sink.
ULTRA EFFICIENT 98 THERMAL PERFORMANCE - Maximize energy savings without compromising on comfort.
PREMIUM DURABILITY WITH GLASS LINED TANK - Built to last with corrosion-resistant materials for years of reliable use.

The Bosch Tronic 3000 T Mini-Tank Water Heater delivers 2.5 gallons of near-instant hot water with 98% thermal efficiency. Compact and lightweight, it installs easily under sinks or on walls with a 120V plug-in design. Featuring a durable glass-lined tank and versatile mounting options, it’s engineered for fast recovery and long-lasting performance, backed by a 6-year warranty.

Specifications

Brand	Bosch
Product Dimensions	13.75"W x 13.75"H
Special Feature	Lightweight
Color	White
Wattage	1440 watts
Voltage	120 Volts (DC)
Maximum Temperature	140 Degrees Fahrenheit
Heat Output	2.5 Gallons
Efficiency	98%
Style	Water Heater
Maximum Pressure	41.4 Bars
Mounting Type	Wall
Is Electric	Yes
Manufacturer	Bosch Thermotechnology Corporation
Item Depth	10.75
UPC	052575049960
Global Trade Identification Number	00052575049960
Part Number	7738004996
Item Weight	15.5 pounds
Item model number	7738004996
Is Discontinued By Manufacturer	No
Size	2.5 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

Have a Question? See What Others Asked

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 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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6801 DH

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Moroccostore

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

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