Choose another country or region to see content specific to your location.

Product at a glance

Immersion heater control

Designed for use with Economy 7 off peak rate overnight electricity, the E7 Quartz is the standard by which all other water heating controls are judged and is the all time best seller in water heating controls.


  • For use with cheap rate overnight tariffs such as Economy 7 or similar to provide a tankful of hot water each morning


  • Keeps time during power interruptions
  • Summer and Winter time settings instantly visible
  • Large terminals and back box for easy installation
  • Indicator lights show whether on-peak or off-peak power is being used
  • Up to 120 mins. boost means extra hot water at any time


  • Quartz controlled accuracy within 10 minutes a year
  • Rechargeable battery
  • Summer and winter time settings
  • Boost timer • ‘Boost on’ indicator light • Economy 7 Quartz 2hr has a 1-2 hour boost timer
  • Large terminals and back box
  • Off-peak indicator light
  • Industry standard wall box and connections
  • 7 years no quibbles warranty


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
Moisture protection Ordinary
Enclosure protection IP30
Shock protection Class one
Live parts Enclosed
Impulse rating 4000V
Operating temperature range 0°c to +35°C
Battery reserve 150 hours
Clock am/pm Indication Winter/Summer indication
Programme options Off-peak: adjustable between 4. 5 and 7 hours
Boost: 0-120 minutes
Dimensions 170 x 115 x 60mm (excluding switches)
BEAB approved Yes
For more details click here.