10 Best Immersion Heater Timer Switch With Boost in The UK

Last updated on 23/08/2025

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Best Choice

9.8

Exceptional

LavaTap

Secure E7+ Smart Immersion Heater Timer Control Bluetooth Replacement for Horstmann Electronic 7 Economy 7 Quartz

Free Shipping

Why We Love It

Bluetooth-enabled for smart control.
Retrofitting is effortlessly easy.
Unmatched 7-year warranty.

Main Highlights

Suitable for use with single, dual, or twin element immersion heaters
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
Easy to retrofit using the provided adaptor plate and fully interchangeable with all Horstmann/Secure Economy 7 and Electronic 7 controllers
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
Programmable boost - can be programmed so that it will heat only a small part of your tank at a set time each day
Manual Boost button - ideal for 30 minutes, 1, or 2-hour top-up without changing the set program
7 years no quibble warranty

Optimum- Ecosave Economy 7 Off Peak Immersion Storage Heater Time Switch Boost Timer 24 hour time control- 230V White

4% OffFree Shipping

Why We Love It

Programmable every 15 minutes.
Suitable for dual heaters.
Manual on/off switch included.

Main Highlights

24 hour water Heater time switch for single/dual or twin immersion Heater applications programmable every 15 minutes
Suitable for combination storage/convector heaters with a 15 to 120 minute adjustable boost
Indicator lights display on, Peak and boost outputs
Contact rating of 16A at 230V 50Hz and a running reserve of 72 hours
Comes with manual on/off switch
Note Ensure that the On/Off switch on the back of the unit is switched to “On” when the product is installed
Ensure the on/off switch on the back of the product is set to the “ON” position before mounting. If using one immersion element add a link between the off-peak and boost terminals using a solid copper core that is rated to carry at least 13 Amps. Also, check that the immersion element you are trying to switch is functioning by checking its resistance using an ohm meter. If unsure how to do this, employ the services of an electrician.

Timeguard TRTD7N Economy 7 Digital Water Heater Controller Time Switch (New Model)

Why We Love It

24-Hour timer mode functionality.
Customizable boost duration options.
Durable double pole switch.

Main Highlights

Timer mode: 24 Hour + Boost
Boost duration: 30, 60 or 120 minutes
Switch type: Double Pole Rocker Switch
Maximum permissible loads: 13A Resistive, suitable for immersion heaters up to 3kW
IP rating: IP30

SPARES2GO Economy 7 Quartz Multi-Tariff Timer with Boost Control for Immersion & Combination Storage/Convector Heaters

Why We Love It

Effortless money-saving features.
Adjustable 15-minute programming.
Premium build quality.

Main Highlights

Immersion Heater Timer made for SPARES2GO. This switch is suitable for electric immersion heaters & combination storage / convector heaters.
Height: 85mm -- Width: 155mm -- Depth: 50mm -- Water heater timeswitch -- 24 hour time control -- Single / dual or twin immersion heater applications -- 15 to 120 minute boost (adjustable) -- Programmable every 15 minutes -- Tappets are tamper-proof through transparent plastic cover -- Separate wiring base -- Quartz -- Running reserve 72 hours
Voltage: 220 - 240V AV 50Hz -- Temperature Rating: -10C to 55C -- Max Current: 16A Resistive / 2A Inductive -- Boost: Adjustable between 15 & 120 minutes -- Fitting: Surface Mounting -- Protection Category: IP20 -- Complies with European Norm EN 60730-1: 2011 Automatic Electrical Controls for Household and similar use -- Complies with European Directives LVD, EMC & RoHS
This mechanical 24 hour multi tariff time switch allows for individual adjustment of the heating period within 24 hours every 15 minutes in order to avoid expensive peak hours. It also features a 15 to 120 minute boost function. This time switch enables the control of electric heaters with a capacity of up to 3000 watts. With its simple & modern design, low profile and easy mounting on flush-mounted boxes, this time switch can help you save money effortlessly.
Premium quality timeswitch

Smart WiFi Fused Spur Timer Switch for Immersion Heaters, Electric Towel Rails, Storage Heaters & Lighting - 13A Timer Switch with Power Monitoring | Alexa & Google Voice Control | No Hub Required

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Why We Love It

Smart scheduling made easy.
Voice control for convenience.
Energy savings through monitoring.

Main Highlights

🕐 SMART TIMER & REMOTE CONTROL - Advanced programmable timer with scheduling via Smart Life app and Tuya Smart app. Control your immersion heater, storage heater, or towel rail from anywhere in the world. Set daily schedules, countdown timers, and boost functions.
🎙️ VOICE CONTROL & SMART HOME INTEGRATION - Full compatibility with Amazon Alexa and Google Assistant for hands-free voice commands. Works seamlessly with existing Tuya Smart ecosystem. No additional hub or bridge required - connects directly to 2.4GHz WiFi.
⚡ HIGH CAPACITY & DETAILED POWER MONITORING - Handles up to 3000W resistive loads (storage heaters, immersion heaters), 1000W halogen/incandescent, 500W LED, 100W CFL. Real-time power consumption tracking and energy usage history to reduce electricity bills.
🔒 PROFESSIONAL SAFETY FEATURES - Two-pole isolation switch with replaceable fuse for maximum safety. CE and RoHS certified. Perfect for high-power applications like immersion tanks, storage heaters, and electric towel rails in bathrooms.
🛠️ ELECTRICIAN-FRIENDLY INSTALLATION - Compact design with plenty of room for wiring connections. Fits standard 25mm UK backboxes with 2 x 2.5mm T&E conductors per terminal. LED indicators show power and output status for easy troubleshooting.
📱 COMPREHENSIVE APP CONTROL - Compatible with both Smart Life app and Tuya Smart app. Set up to 7-day weekly schedules, create scenes, monitor energy usage, and share device access with family members. Works with existing smart home setups.

CHOSRY WiFi Fused Spur Timer Switch for electric towel rails, heating, and lighting (if showing as unavailable, please visit our store at chosry dot com)

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Why We Love It

"Programmable from anywhere worldwide. Compatible with many heaters. Includes a countdown timer."

Main Highlights

PROGRAMMABLE: Simple to programme using the Tuya Smart app, Smart Life app, Alexa, or Google Assistant, giving you access to control your installation anywhere in the world
HEATING: Suitable for the majority of electric heaters up to 3KW including immersion heaters, water heaters, panel heaters, electric towel rails, convector heaters, storage heaters, fan heaters, overdoor heaters and many more
LIGHTING: Suitable for lighting circuits including LED lighting loads up to 150W, incandescent/halogen lighting loads up to 700W, fluorescent lighting loads up to 500W, CFL lighting loads up to 80W. Not suitable for discharge lighting. Note that the timer requires a live and neutral from the power supply and a live and neutral to the load to operate.
ONE TOUCH: The ability to switch ON and OFF with a simple touch of a button or set multiple programming times
APP FUNCTIONS: Includes a countdown timer and energy usage monitoring
OPERATING SYSTEM: Available for Android and iOS only. Works with WiFi and 4G/5G
CERTIFICATION: CE, UKCA (UK Conformity Assessed)
CONTENTS: WiFi timer switch, electrical socket screws, cable clamp, and installation guide
DIMENSIONS: 86mm x 86mm x 38mm
TECHNICAL ASSISTANCE: For help and advice on the installation and operation of any our products, please visit our website (chosry.com) where we have a selection of videos and blogs which offer step-by-step guides and troubleshooting hints and tips. You can also phone or email us with any questions you may have using the contact details provided.

Timeguard NTT08 7-Day Slimline Electronic Immersion Heater Timeswitch

31% OffFree Shipping

Why We Love It

Prevents accidental programme changes.
Supports high load rating.
Offers extensive programmability.

Main Highlights

Special ‘easy slide’ programme cover to prevent accidental programme changes
16(4)A load rating
4 ON/4 OFF easy-set programme periods per day, 28 ON/28 OFF programmes per week
Shortest switching time 1 minute
Extra large ‘Easy View’ screen with blue LED backlighting

Optimum Energy Saving Electronic Time Switch - 2 Hour Electronic Boost Timer Socket Box Mount - White, One 230 V

Free Shipping

Why We Love It

Easy and intuitive to use.
Offers various timing options.
Safe resistive output rating.

Main Highlights

EASY TO USE: Simply click the 'Boost' button to increase the ON time to a maximum of 2 hours; it also features a visual indication that gives you the duration of the boost you must pick.
RESISTIVE RATING: Allows for timed regulation of any mains electrical load with a resistive rating of up to 16 amps, to be safe and to get the most out of the Boost timer stay within the required resistive ratings.
MOUNTING: It is designed to fit onto a standard in-wall pattress box.
OUTPUT OPTIONS: It has both Timed / Delayed outputs, each with four pre-set periods. It offers timed outputs of 15 minutes, 30 minutes, 1 hour, and 2 hours.
SPECIFICATIONS: 4 wire-protect screw terminals and an earth park are used for connections. Features a T45 Temperature Rating, 16A Resistive Output Rating, IP20 Rating, and a 220 - 240V AC 50Hz power supply.

Timeguard FST24 24 Hour Fused Spur Timeswitch Storage/Immersion Heater

6% OffFree Shipping

Why We Love It

Reliable time management solution.
High-quality manufacturing.
Model offers precision.

Main Highlights

Manufacturer name: time guard
Model No: BPSCA FST24 - PL14941

Timeguard Sure Time 2 Hour Electronic Boost Timer

Main Highlights

2 hour electronic boost timer

8.7

Excellent

We scanned 615 products

We reviewed these offers relevant to the Immersion Heater Timer Switch With Boost within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like LavaTap, Optimum, Best Price Square, Spares2go, Candeo, CHOSRY, Timeguard, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Immersion Heater Timer Switch With Boost in the market, we considered we took a deep dive into 3076 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Secure E7+ Smart Immersion Heater Timer Control Bluetooth Replacement for Horstmann Electronic 7 Economy 7 Quartz. We love many things about this product by LavaTap. What sets it apart from the competition is Bluetooth-enabled for smart control, Retrofitting is effortlessly easy, Unmatched 7-year warranty.
The best value product for most shoppers and where user satisfaction is continuously the highest is Optimum- Ecosave Economy 7 Off Peak Immersion Storage Heater Time Switch Boost Timer 24 hour time control- 230V White by Optimum based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Immersion Heater Timer Switch With Boost and the best cost-to-value ratio is Timeguard NTT08 7-Day Slimline Electronic Immersion Heater Timeswitchat Timeguard with a 31% discount.
Our list of the best Immersion Heater Timer Switch With Boost is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Immersion Heater Timer Switch With Boost in The UK

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We scanned 615 products

We concluded that: