DRE is a three phase electric water heater primarily used in commercial applications. This appliance is fitted with 3 to 9 Incoloy-sheated elements with a maximum rating of 54 kW. DRE has a cascade control of the electric elements to ensure steady and responsive heating.


  • Capacity: 173 – 264 litres
  • All elements and thermostats are fuse-protected
  • PermaGlas Ultra Coat second-generation glass coating technology helps to prevent corrosion
  • Replaceable magnesium anode
  • Safety float switch


  • Each element is independently controlled via its own control thermostat (adjustable: 49 – 82°C) and a manually reset-able high-limit thermostat
  • Cascade control of the elements for more steady and responsive heating

Where to buy


  • Unvented kits
  • Destratification pump kit
  • Powered anodes


Quick Download

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

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.

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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 Capacity Profile Energy efficiency class Energy efficiency
52-9 XL C 38.4%
52-18 XL C 38.7%
52-36 XL C 38.9%
DRE Capacity Profile Energy efficiency class Energy efficiency
80-9 XL C 38.7%
80-18 XL C 39.1%
80-36 XL C 39.3%
80-54 XL C 39.0%


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

Heb je vragen over de rookgasafvoer mogelijkheden?

Vind hier de documenten over rookgasafvoer.

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