STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler

Name: Tankless Electric Instantaneous Boiler STIEBEL 202656
Brand: stiebel eltron
SKU: 12236135
Price: 741.49 EUR
Availability: InStock

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Tankless Electric Instantaneous Boiler STIEBEL ELTRON DHE 18/21/24 Vertical, 24 kW, thermostat 20–60°C

STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler Photo 1

STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler Photo 2

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Short description

STIEBEL ELTRON DHE 18/21/24 is a vertical tankless (instantaneous) solo electric boiler delivering up to 24,000 W for on-demand hot water. Designed for vertical installation, it features a built-in thermostat adjustable from 20 to 60 °C, 400 V AC input at 50–60 Hz and compact dimensions (225×116×466 mm). Suited for domestic or light-commercial hot water supply with energy efficiency class A.

Available for order: 18 pcs.

Warranty: 2 Years

SKU: 12236135

Manufacturer: stiebel eltron

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2b. Kengaraga str., Riga, Latvia, LV-1063

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From 4.99 € (Weight: 3.10 kg)

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36 months installment: from 20.60 euros per month

Leasing for legal entities: from 25.8 euros per month

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Product information

Description

STIEBEL ELTRON DHE 18/21/24 Vertical is a tankless electric instantaneous boiler that delivers up to 24 kW of power for on-demand domestic or light-commercial hot water. Designed for vertical installation, the unit features a built-in thermostat adjustable from 20 to 60 °C, 400 V AC input at 50–60 Hz and compact dimensions (225×116×466 mm). Fully electronic control with 4i technology compensates for changes in inlet conditions to maintain the set outlet temperature, while a backlit multifunction display and a haptic rotary selector provide clear information and intuitive operation.

Advantages

The DHE instantaneous water heater supplies hot water at the exact set temperature every time by using electronic regulation and 4i technology, minimising temperature fluctuations during varying flow rates or inlet conditions. ECO mode and visible energy and water consumption indicators support efficient operation and transparency. The device includes multiple safety and convenience functions such as temperature limiting, programmable temperature memory, automated filling routines and child protection, making it suitable for households and small commercial installations where consistent and safe hot water delivery is required.

Suitable for

Domestic showers and washbasins where stable temperature is required
Small offices or commercial washrooms with multiple draw-off points
Installations with limited space that require vertical, compact water heating
Applications that need precise electronic temperature control and ECO operation

Key specifications

Maximum power output: up to 24 kW
Thermostat adjustment range: 20–60 °C
Supply voltage: 400 V AC, 50–60 Hz
Installation orientation: vertical
Compact dimensions: 225 × 116 × 466 mm
Control: fully electronic with 4i regulation technology
User interface: illuminated multifunction display and haptic rotary selector
Modes: ECO mode and programmable temperature memory
Indicators: energy and water consumption, flow rate and status displays

How to use

Install the unit vertically following local electrical and plumbing regulations and ensure a suitable 400 V AC supply and proper circuit protection. Set the desired outlet temperature using the rotary selector and the illuminated display; the appliance will regulate power automatically to maintain the chosen temperature. Use ECO mode to reduce energy consumption where appropriate, and consult the display for real-time information on flow, consumption and device status. For multi-point supply, verify required flow rates and adjust settings to match user demand.

Usage recommendations

For reliable performance, ensure regular inspection of electrical connections and water filters, and follow the manufacturer’s service intervals. Use ECO mode when lower flow or lower temperature is acceptable to improve energy efficiency. When installing for multiple draw-off points, verify that combined flow does not exceed the heater’s capacity to maintain the set temperature.

Specifications

Energy efficiency class: Rating of how efficiently a device uses energy, affecting power consumption and costs.: A
Maximum power: The maximum power that can be put into or produced by the device.: 24000 W
Boiler system: This is a a household device providing a hot-water supply or serving a central heating system.: Solo boiler system
Type: Characteristics of the device.: Tankless (instantaneous)
Placement supported: Where the product can be placed e.g. indoor/outdoor, horizontal/vertical.: Vertical
Fuel type: The type of fuel used with the product e.g. natural gas.: Electric

All features

Weight & dimensions

Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.: 3.1 kg
Height: The measurement of the product from head to foot or from base to top.: 466 mm
Depth: The distance from the front to the back of something.: 116 mm
Width: The measurement or extent of something from side to side.: 225 mm

Power

Energy efficiency class: Rating of how efficiently a device uses energy, affecting power consumption and costs.: A
Annual energy consumption: The amount of energy used by the product per year.: 476 kWh
AC input frequency:: 50 - 60
AC input voltage: The voltage of the AC electricity that is inputted into the product.: 400
Energy efficiency scale: Range of energy efficiency levels classifying devices from most to least energy-efficient.: A+ to F

Ergonomics

Built-in display: A display which is part of the product, so you do not need to attach another display.: Yes

Performance

Noise level: The amplitude level of the undesired background noise, usually measured in decibels (db).: 15 dB
Efficiency:: 39 %
Thermostat range:: 20 - 60
Maximum power: The maximum power that can be put into or produced by the device.: 24000 W

Design

Fuel type: The type of fuel used with the product e.g. natural gas.: Electric
International Protection (IP) code: The IP code classifies and rates the degree of protection provided against the intrusion (including body parts such as hands and fingers), dust, accidental contact, and water by mechanical casings and electrical enclosures. It is published by the International Electrotechnical Commission (IEC). The digits (characteristic numerals) indicate conformity with the conditions summarized in the tables below. Where there is no protection rating with regard to one of the criteria, the digit is replaced with the letter X. an electrical socket rated IP22 is protected against insertion of fingers and will not be damaged or become unsafe during a specified test in which it is exposed to vertically or nearly vertically dripping water. Another example is the Sony Xperia Z Ultra, one of the first cellular phones to be IP-rated; it is rated at IP58 and marketed as "dust resistant" and can be "immersed in 1.5 meter of freshwater for up to 30 minutes".: IP25
Product colour: The colour e.g. red, blue, green, black, white.: White
Boiler system: This is a a household device providing a hot-water supply or serving a central heating system.: Solo boiler system
Type: Characteristics of the device.: Tankless (instantaneous)
Placement supported: Where the product can be placed e.g. indoor/outdoor, horizontal/vertical.: Vertical

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Instructions

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Description

Instructions

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Energy label

202656

Model

Device manufacturer code

stiebel eltron

Manufacturer

Device manufacturer

Energy efficiency class

Rating of how efficiently a device uses energy, affecting power consumption and costs.

24000 W

Maximum power

The maximum power that can be put into or produced by the device.

Solo boiler system

Boiler system

This is a a household device providing a hot-water supply or serving a central heating system.

Tankless (instantaneous)

Type

Characteristics of the device.

Vertical

Placement supported

Where the product can be placed e.g. indoor/outdoor, horizontal/vertical.

Electric

Fuel type

The type of fuel used with the product e.g. natural gas.

Customer reviews

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Customer questions

FAQ

How much does the STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler cost, and is it available for purchase?

The price is 741.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 18 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 10.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

Can STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler online, and the application process is as simple as possible:

Select the product on the website and add it to your cart;
When placing your order, choose the payment method “Installments”;
Fill in the required details for the lending partner;
Receive a decision within a few minutes.

For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All stiebel eltron products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized stiebel eltron service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: energy efficiency class, maximum power, boiler system, type, placement supported, fuel type, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

Where can I download the instructions for STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

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Tankless Electric Instantaneous Boiler STIEBEL ELTRON DHE 18/21/24 Vertical, 24 kW, thermostat 20–60°C

Short description

Product information

Description

Advantages

Suitable for

Key specifications

How to use

Usage recommendations

Specifications

Weight & dimensions

Power

Ergonomics

Performance

Design

Instructions

Description

Instructions

Similar products

Product comparison

Energy label

Customer reviews

Customer questions

How much does the STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler cost, and is it available for purchase?

If I order this product today, when will I receive my order?

What payment options are available?

Can STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler be purchased with a lease?

Can this product be purchased for a company (with VAT)?

What is the warranty period?

Can the product be returned after purchase?

Where should I contact for warranty service?

How can I tell if this product suits my needs?

Where can I download the instructions for STIEBEL ELTRON DHE 18/21/24 tankless 24 kW boiler?