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Horstmann Economy 7 Quartz Electro-mechanical Water heating Control 13A 230V for Immersion Heaters up to 3kW

Availability: Usually 3-5 days


List price £107.27
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(over £100+VAT, applies to zones A&B only , £6 +VAT otherwise)
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The Economy 7 Quartz from Hortsmann is an electro-mechanical water heating control which can be set to take advantage of cheap night-rate electricity, so that there is a tank of hot water available for the morning.

It comes supplied with its own surface-mounting box, which can also be mounted over a singe or double gang flush wall box (it shouldn't be mounted on an unearthed metal surface). 

Means of disconnection from the supply having at least 3mm contact separation in both poles must be incorporated in the fixed wiring.

We recommend a separate fused circuit from the consumer unit (24 Hour supply) protected by a 15 amp HRC fuse or, preferably a 16 amp MCB. In some cases immersion heater failure can damage the Economy 7 Quartz. Installation of a 100 mA RCD will provide additional protection for the unit. If the Economy 7 Quartz is to be connected to a ring main then the spur feeding the controller should be protected in the same way.

Technical Specifications

  • 13A 230V AC 50Hz
  • Electro-Mechanical
  • Suitable for immersion heaters up to 3kW
  • Live Parts - Enclosed
  • Dirt protection - Normal situation
  • Moisture protection - Ordinary
  • Operating Temperature - 0 - 35oC
  • Shock protection - Class 1
  • Contacts - Micro-disconnection
  • Battery reserve - 150 Hours
  • Size - 170mm x 115mm x 56mm (excluding rocker switch)

Note: Some images and pictures are for reference only. The item may differ from the image/picture due to manufacturer's change. Should you require the exact item in the picture, please call or email us to enquire.

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Sparks Direct delivers via courier to the UK only; the standard delivery charge is £6 + VAT for all orders under £100 + VAT. If your order is over £120, you get free delivery (unless there's a special delivery charge for the items you wish to order or you're in shipping zone C or D). Full details for shipping charges can be found via Terms and Conditions.

If the items you order are in stock and the order is placed before 1.00pm, delivery can be made within 1-2 working days. If the items are not in stock, we will inform you via email how long it will take or ask for your confirmation if there's a long lead time.


We offer 30-day returns for unwanted items - please email us to request a returns number which will need to be quoted when the items are returned. For faulty items or items damaged in transit, please advise via email, and an appropriate returns number will be provided. Full details concerning returns and refunds can be found via our Terms and Conditions.