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Product at a glance

Our smart-capable immersion heater control

The new E7+ from Secure is the latest version of the Electronic 7 hot water programmer. Designed to be the successor to both the Electronic 7 and the Economy 7 Quartz, it is easy to install or retrofit. Now with a new compact interface that is perfect for newer installations, as well as an adaptor plate to make retrofitting a simple matter of plug and play. The E7+ can be controlled by the Secure Bluetooth-enabled App, within a property, and there is even an optional plugin Wi-Fi card that will turn the E7+ into a truly smart unit you can control from anywhere. E7+ is designed to control one or two 3kW immersion heaters, can also be programmed locally to provide a full tank of hot water whenever required during off-peak electricity timing. Each heater can be programmed separately for maximum energy saving and control. The E7+ is perfect for standalone control of electric hot water and uses the same app as our range of smart-capable programmable thermostats - C1727 and H3747.


  • Suitable for use with single, dual, or twin element immersion heaters


  • Easy to retrofit using the provided adaptor plate and fully interchangeable with all Horstmann/Secure Economy 7 controllers
  • No Wi-Fi necessary for local control of hot water via app using Bluetooth
  • New streamlined compact design
  • Easy to upgrade to full smart (remote) control using Wi-Fi adaptor
  • Uses the same app as the C1727 and H3747 smart-capable programmable thermostats
  • Tamper-proof Programme security feature for landlords
  • 7 years no quibble warranty


  • Bluetooth-enabled app for local control (Android and IOS)
  • Full smart control from anywhere with optional Wi-Fi adaptor that does not need a hub or gateway
  • Manual Boost button - ideal for 30 minutes, 1, or 2-hour top-up without changing the set program
  • Programmable boost - can be programmed so that it will heat only a small part of your tank at a set time each day
  • Electronic on/off switch
  • Measures estimated energy consumed for boost and off-peak in kWh via the app
  • Includes 7-day programmer with 3 On Offs straight from the device, more can be added via the app


Contact rating 13 Amps 230V AC Suitable for immersion heaters up to 3kw
Contact type Micro-disconnection on control, disconnection to immersion heaters on double-pole rocker switch
Supply 230V 50Hz
Pollution degree Degree 2 normal situations
Moisture protection Ordinary
Enclosure protection IP30
Shock protection Class 1
Live parts Enclosed
Operating temperature range 0°c to 35°C
Battery reserve Approximately 2 years total power disconnection
Clock am/pm Indication Winter/Summer indication
Programme options Full 7-day programmming; Off-peak & Boost, up to three time periods each; Boost – programmable automatic boost and 1/2, 1, and 2-hour manual boosts
Dimensions 170 x 115 x 60mm (excluding rocker switch)
Compliance Bluetooth BLE compliant
Operating frequency 2.4 GHZ
RF range ~60m, line of sight
Product Standard/Safety : BSEN / EN 60730-1, BSEN / EN 60730-2-7
RED Radio: ETSI EN 300 328 RED EMC: ETSI EN 301 489-1, ETSI EN 301 489-17, BS EN 60730-2-7

Installation Videos

E7+ Retrofit installation

This video familiarises you with the retrofitting of the new E7+ device in place of the existing Electronic 7 or Economy 7 quartz. It has an adapter plate to make retrofitting simple plug-and-play.

E7+ new installation

This video familiarises you with the installation of a new E7+ device.The E7+ is designed to control single or twin immersion heating load up to 3 kW, utilising off-peak electricity tariffs to provide a full tank of hot water as per your preference.