Plumbing & Water · My build kit

Bosch Tronic ES4 Mini-Tank Water Heater

I bought the Bosch ES4 among my water-system equipment. Tank location, access and the surrounding cabinetry belong to the interior layout work that my diary placed after the body openings.

By · Camper Van Freedom

Read my build notes ↓

The Item in My Kit

I bought Bosch Tronic ES4 Mini-Tank Water Heater as part of my camper van equipment.

I bought the Bosch ES4 among my water-system equipment. Tank location, access and the surrounding cabinetry belong to the interior layout work that my diary placed after the body openings.

A Mini-Tank Within the Interior Space Plan

  1. I used SketchUp to plan the interior and put body openings ahead of the framing, floor and wall panels.
  2. My Interior Preparation notes included the shower drain and openings for three water tanks in that preparation sequence.
  3. I removed cargo tie-down hardware for later framing mounts and door trim for the later insulation and paneling.
Removing stuck-on residue during the floor cleanup.
Removing stuck-on residue during the floor cleanup.
The cargo floor during my preparation session before sound deadening.
The cargo floor during my preparation session before sound deadening.

My Takeaway for the Build

Planning the interior before framing meant considering the appliance cabinet and its connections together. My Bosch ES4 purchase has a four-gallon tank with top connections and a front control. The smaller Camplux changes stored volume, while Ariston offers another four-gallon cabinet; dimensions and access remain separate parts of that comparison.

Product Details And Van-Build Uses

SpecificationProduct Detail
ModelES4, Tronic 3000T
Tank Capacity4.0 gallons
Electrical Rating1440W at 120V AC; 12A
Installation OrientationVertical

The ES4 is a stored-water mini-tank heater rather than an on-demand heater. Bosch’s manual gives the four-gallon capacity, electrical load and vertical mounting arrangement, followed by water connections, starting, temperature adjustment and maintenance. For a camper-van kitchen plan, the heater needs space for its cabinet, plumbing and future service access. The manual’s maintenance section covers draining, the heating element and anode inspection, which is useful when the unit has been enclosed beneath a counter. ES2.5 and ES8 share the document, so the ES4 column and drawing are the relevant references for this purchase.

Manufacturer Product Reference

Download Bosch Tronic 3000T ES2.5/ES4/ES8 Installation And Operating Manual (PDF)

UM-2000 Water Tank Reference

Is ES4 An Instantaneous Water Heater?

No. ES4 stores water in a four-gallon mini-tank and uses an electric heating element.

Alternative products

Two Alternatives to Compare

The Camplux mini-tank is smaller at two-and-a-half gallons. Ariston Andris offers a four-gallon tank with a different cabinet shape, so both storage volume and cabinet dimensions affect the comparison.

ProductWhat distinguishes itPurchase link
Bosch ES4 Four-Gallon Mini-Tank Water HeaterFour-gallon tank with top connections and front temperature control.View on Amazon
Camplux Two-and-a-Half-Gallon Mini-Tank Heater (alternative)Smaller two-and-a-half-gallon mini-tank cabinet.View on Amazon
Ariston Andris Four-Gallon Mini-Tank Heater (alternative)Another four-gallon mini-tank with different cabinet shape.View on Amazon
Camplux Two-and-a-Half-Gallon Mini-Tank Heater

Camplux Two-and-a-Half-Gallon Mini-Tank Heater

This compact electric heater stores water in a small tank. Its cabinet has a front temperature control and top water connections.

View on Amazon
Ariston Andris Four-Gallon Mini-Tank Heater

Ariston Andris Four-Gallon Mini-Tank Heater

This compact electric heater stores water in a four-gallon tank. A front control and top connections define the appliance's cabinet layout.

View on Amazon

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