DRE Plus

The DRE Plus series consists of electric water heaters that are particularly suitable for industrial applications due to their power and capacity. The ‘Plus’ in this range is the display that provides various control and reading options.


  • Capacity: 173 – 264 litres
  • Powerful electric water heater that produces large amounts of hot water in a short time
  • DWH capacity from 339 to 1132 litres/hour at 50°C depending on the chosen appliance
  • Because the unit has an external on/off function, you can control when to use external power supply. For example when you have supply from your PV panels
  • 3 to 9 incoloy heating elements with a maximum output of 50.4 kW
  • Cascade control of the heating elements allows a more even and responsive heating of the water
  • All elements and thermostats are fuse-protected
  • PermaGlas Ultra Coat second-generation glass coating technology helps to prevent corrosion


  • The appliance can be adjusted according to DHW needs via the display, so that the appliance can function as energy-efficiently as possible
  • Thanks to the enameled elements, the exchangeable magnesium anode is less stressed
  • Targeted maintenance possible thanks to the display of the exact fault diagnosis on the elements

Where to buy

DRE Plus

Quick Download

Below you will find a download to Autocad drawings per unit.

Quick Download

Below you can download our CE certificates or other certificates and/or declarations that may apply to the product.

Quick Download

Below you can download the energy label of each water heater. This label shows the efficiency per device.

Quick Download

Below you will find Instruction Manuals with information about the installation, commissioning and maintenance of your installation.

Quick Download
Quick Download

Here you can download the product cards per device.

Quick Download

Below you can download our spec sheets. These sheets contain all possible information regarding technical specifications such as the load profile, input, draw-off capacity,  dimensions and installation options.

Ecodesign Specifications

DRE Plus Capacity Profile Energy efficiency class Energy efficiency
52-9 XL C 38.0%
52-18 XL C 38.5%
52-36 XL C 38.7%
DRE Plus Capacity Profile Energy efficiency class Energy efficiency
80-9 XL C 38.0%
80-18 XL C 38.5%
80-36 XL C 39.1%
80-54 XL C 38.1%


Anyone who makes vital high-end equipment and considers user comfort a top priority must be able to guarantee and support the flawless operation of its products. Customer satisfaction throughout the life of the product. AO Smith offers an adequate service package: sizing, commissioning, service and maintenance.


What is the delivery time for this product?

For the delivery time of this product, it is best to contact our distributor, they can help you with this

How do I know which product is most suitable for my project?

You can always contact our Sales Engineers, they are happy to help you with this.

Where can I find information about products that are no longer in production?

In the Discontinued products you will find the information that is available about products that are no longer in production

Incentives for sustainability

The UK government provides different kinds of incentives for sustainability. Those rewards are given to both home owners and businesses.

Click here for more informations.

ROI for HE water heater?

Recover your investment quickly with a high-efficiency water heater. Know how here

  • More information?

    Please fill in the form below and we will contact you as soon as possible.