--- product_id: 50701200 title: "Horstmann Electronic 7 Water Heater, Multi" brand: "horstmann" price: "£119.76" currency: GBP in_stock: true reviews_count: 8 category: "Horstmann" url: https://www.desertcart.co.uk/products/50701200-horstmann-electronic-7-water-heater-multi store_origin: GB region: United Kingdom --- # Precise to the minute timing Boost button for instant 1-hour heat Auto BST/GMT summer-winter switch Horstmann Electronic 7 Water Heater, Multi **Brand:** horstmann **Price:** £119.76 **Availability:** ✅ In Stock ## Summary > ⏳ Upgrade your water heating game—precision, power, and effortless control in one sleek device! ## Quick Answers - **What is this?** Horstmann Electronic 7 Water Heater, Multi by horstmann - **How much does it cost?** £119.76 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/50701200-horstmann-electronic-7-water-heater-multi) ## Best For - horstmann enthusiasts ## Why This Product - Trusted horstmann brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Heat Boost:** Need hot water now? Activate the boost button for an extra hour of heating on demand. - • **Seamless Seasonal Sync:** Automatically adjusts for daylight saving time, so you never have to reset your timer again. - • **Effortless Installation:** Direct replacement for older models with no rewiring or back box changes—upgrade in under 5 minutes. - • **Precision Timing Mastery:** Set your water heating schedule down to the exact minute—no more guesswork or wasted energy. - • **Energy-Smart Economy 7 Control:** Optimizes off-peak heating periods to save you money while ensuring hot water when you need it. ## Overview The Horstmann Electronic 7 Water Heater Controller is a cutting-edge immersion heater timer designed for Economy 7 and standard off-peak water heating systems. Featuring precise minute-level programming, automatic daylight saving time adjustments, and a convenient boost function, it offers superior energy efficiency and user-friendly installation. Compatible with existing setups, it ensures optimal hot water availability while reducing energy waste. ## Description Product Description electronic 7 Legal Disclaimer 60.00 Review: Simple and easy to program. Precise time, ideal for Economy 7 or standard. - Cant quite believe how fantastic this product is. After looking at many different models I finally made my decision based on the review of desertcart1 who had attached photos and I was astounded my old timer was the same as their old timer. So I had no doubt it would fit perfectly. It looks like it might be tricky to program but it is so easy and takes seconds. Infact it is so much quicker and more efficient than trying to set the old mechanical style timer. It is extremely precise as you can program it to the exact minute as oppose to roughly guessing on an old dial style timer. A very simple efficient design and from what I have read the Horstmann series seem to be pretty much all interchangeable. The other great feature my old one didn't have is its ability to automatically switch between summer time and winter time. You must have it set to this feature if you need it. I do as I have Economy 7 but it depends on ones own system. As it has a battery back up the clock did not need setting and was telling the correct time as soon as it was given power. The boost button will heat your water for one hour before switching off should you need it. So easy to use I wouldn't consider anything else. Comes with full installation and user guides. Review: Seamless upgrade from Economy 7 - Bought this to replace a failed Economy 7 model. Because the new model shares the same back box, replacement took only minutes. The mains cabled are screw terminated, but the connection to the electronics is spade and tails, so you can leave the old back box in place, disconnect the electronics, and replace with the new electronic unit. A rare bit of solid design. Programming the new unit could not be easier. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0031SCQMI | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 175,834 in DIY & Tools ( See Top 100 in DIY & Tools ) 475 in Water Heaters & Parts | | Colour | Multi | | Customer Reviews | 4.5 4.5 out of 5 stars (523) | | Date First Available | 17 May 2012 | | Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. | | Included Components | ELECTRONIC7 | | Item Package Quantity | 1 | | Item Weight | 400 g | | Item model number | Electronic 7 | | Manufacturer | Horstmann | | Part Number | Electronic 7 | | Plug profile | Wall | | Power Source | AC | | Product Dimensions | 12.6 x 17.4 x 7.2 cm; 400 g | | Style | Indoor Installation | | Voltage | 230 Volts (AC) | ## Product Details - **Brand:** Horstmann - **Product dimensions:** 17.4W x 7.2H centimetres - **Colour:** Multi - **Voltage:** 2.3E+2 Volts (AC) - **Style:** Indoor Installation ## Images ![Horstmann Electronic 7 Water Heater, Multi - Image 1](https://m.media-amazon.com/images/I/31e9b5W0AHL.jpg) ## Questions & Answers **Q: is it simple plug in to quartz wall box** A: Mine was replacing a mechanical Newlec timer which I believe is an older version of the Horstmann Quartz: for the Newlec the colour codes are identical, just unplug the old timer connectors and plug in the new ones. http://www.horstmann.co.uk/water-heating.php is your friend here - the installation guides for the Quartz and the Electronic 7 are on there and show identical pin-outs. Disclaimer: I am not an electrician: you should exercise due diligence before proceding! **Q: Can this item replace an old 'horstmann e7 bx' unit?** A: I used it as a direct replacement for an existing 30 year old Horstmann E7 unit but I can’t say whether it was a ‘bx’ unit. **Q: Does anyone know if this unit will replace an old Electra tech control panel? I only need to use it for setting the hot water not radiators** A: I don't know if it will replace 'an old Electra tech control panel' but you can certainly set this unit for water heating only for any chosen time period/duration with summer/winter auto time change.There is also a Boost selector for use at anytime outside your 'set' period. Hope it helps!! **Q: Can i replace my old horstmann electronic 7 with this** A: You can replace an old Horstmann electronic 7 with the new model. It fits directly into the existing backplate fittings. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Simple and easy to program. Precise time, ideal for Economy 7 or standard. *by M***F on 18 January 2018* Cant quite believe how fantastic this product is. After looking at many different models I finally made my decision based on the review of Amazon1 who had attached photos and I was astounded my old timer was the same as their old timer. So I had no doubt it would fit perfectly. It looks like it might be tricky to program but it is so easy and takes seconds. Infact it is so much quicker and more efficient than trying to set the old mechanical style timer. It is extremely precise as you can program it to the exact minute as oppose to roughly guessing on an old dial style timer. A very simple efficient design and from what I have read the Horstmann series seem to be pretty much all interchangeable. The other great feature my old one didn't have is its ability to automatically switch between summer time and winter time. You must have it set to this feature if you need it. I do as I have Economy 7 but it depends on ones own system. As it has a battery back up the clock did not need setting and was telling the correct time as soon as it was given power. The boost button will heat your water for one hour before switching off should you need it. So easy to use I wouldn't consider anything else. Comes with full installation and user guides. ### ⭐⭐⭐⭐⭐ Seamless upgrade from Economy 7 *by A***R on 16 April 2024* Bought this to replace a failed Economy 7 model. Because the new model shares the same back box, replacement took only minutes. The mains cabled are screw terminated, but the connection to the electronics is spade and tails, so you can leave the old back box in place, disconnect the electronics, and replace with the new electronic unit. A rare bit of solid design. Programming the new unit could not be easier. ### ⭐⭐⭐⭐⭐ Product has held up well. *by L***T on 27 March 2026* Very convenient to get from Amazon. Perfect replacement. Fair price. ## Frequently Bought Together - Horstmann Electronic 7 Water Heater, Multi - Heatrae Sadia 95612599 Spare Type TSE Thermostat 11" Rod - Albion SU034 Spare RTS-3 Immersion Thermostat --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/50701200-horstmann-electronic-7-water-heater-multi](https://www.desertcart.co.uk/products/50701200-horstmann-electronic-7-water-heater-multi) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-04*