10 Best Immersion Heater Timer Switch With Boost in the UK
Tested and Reviewed: Top 10 Immersion Heater Timer Switch With Boost deals with expert ratings from 8.1 to a perfect 10
August 2025 Edition
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1
Editor's Choice9.7
Save 12%
Secure E7+ Smart Immersion Heater Timer Control Bluetooth Replacement for Horstmann Electronic 7 Economy 7 Quartz
12% Off
Editor's bottom line:
“This immersion heater timer switch with boost is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”
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
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Picked by 327 people today
2
9.5
Optimum
Optimum- Ecosave Economy 7 Off Peak Immersion Storage Heater Time Switch Boost Timer 24 hour time control- 230V White
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.
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3
9.5
Spares2go
SPARES2GO Economy 7 Quartz Multi-Tariff Timer with Boost Control for Immersion & Combination Storage/Convector Heaters
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
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4
9.2
Save 9%
Best Price Square
Timeguard TRTD7N Economy 7 Digital Water Heater Controller Time Switch (New Model)
9% Off
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
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5
9.0
A1 ELECTRICS A1ELECTRICS.COM
2 Hour Boost Timer for Immersion Heater Hot Water Radiator 3kW and Lighting upto 1kW - Including 80W LED
Main Highlights
- Automatic Timer Countdown Selection: 1/4 Hour, 1/2 Hour, 1 Hour and 2 Hours
- Typical Applications such as immersion heaters, room heaters, towel rails and lighting
- Fits a standard flush or surface mount BS wall box min. 25mm deep
- Switch Rating: 13A (3kW) Resistive, 1000W Filament Lighting, 500W Fluorescent, 100W Compact Fluorescent CFL and 80W LED
- Press boost button to select your time - Press once for 1/4 hours, twice for 1/2 hour, 3 times for 1 hour, 4 times for 2 hours and a fifth time to go back to zero
- LEDs turn off in sequence when counting down - flashes before changing to the next time
- The Boost button LED is always on, which shows there is power to the switch
- Saves money on electricity - it can be easy to forget to turn off immersion heaters etc - this switch turns it off after a max. of 2 hours
- 2 Year manufacturer guarantee
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6
8.8
BritPick
Smart Immersion Heater Timer Switch, 40A 8000W WiFi Water Heater Switch, Smart Touch Boiler Switch with Timer, Smart Life APP Remote Control, Works with Amazon Alexa & Google Assistant
Free Shipping
Main Highlights
- 40A High-Power Switch40A WiFi smart timer switch can support up to 8000W of electrical appliances,including immersion heaters,storage heaters,boiler heaters and other heaters,high-power electrical appliances.Please note that currently this water heater timer switch only supports 2.4Ghz WiFi,but can be controlled by mobile data (2/3/4/5 G).
- Hands-Free Voice ControlCompatible with Amazon Alexa and Google Assistant, control your home appliances with the smart touch switch by simply giving voice commands to Amazon Alexa and Google Assistant.
- Remote Control & TimersYou can control your gas boiler/ water heater using APP Smart Life(for iOS/ Android) from anytime or anywhere.Use timer or countdown schedules to set your smart switch to automatically turn on and off while you're home or away.
- Easy to installImmersion Heater Timer Switch is very easy to install.Neutral wire required/ Only support 2.4GHz WiFi/ Install without power(box not included).Note: Do not exceed the maximum power of the smart switch.
- Tempered Glass PanelWaterproof, moistureproof, scratch-proof.Refined appearance and made of fire resistant maternal, safe and durable;Soft blue indicator shows the on/off clearly, and helps you find the position of the smart switch easily in darkness.
- Group ControlCreate a group in the App to control all your WIFI switches at the same time, or set custom smart scenes to match any occasion like going home, leaving home, sleeping, etc. You can also share your smart devices to your family members.
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7
8.6
Spares2go
SPARES2GO Energy Saving 15 Minute to 2 Hour Electronic Boost Timer for Immersion/Room Heater
Free Shipping
Main Highlights
- SPARES2GO Energy Saving 15 Minute to 2 Hour Electronic Boost Timer for Immersion / Room Heater
- Simply press the button to increase the ON time for up to 2 hours
- Two hour electronic, one button boost timer with visual indicator
- Provides 4 pre-set delay-to-off outputs -- Allows timed control of any mains electrical load up to 16 Amps resistive rating -- 4 pre-set timed outputs: 15 minutes, 30 minutes, 1 hour or 2 hours
- Suitable for installation on a surface or in-wall pattress box -- Simply press up to 4 times to select boost output
- Dimensions: 85 x 85 x 30mm -- Connections: 4 x wire-protect screw terminals & earth park -- Resistive Load: 16A -- Temperature Rating: T45 -- IP Rating: IP20 -- Rating: 16A resistive -- Accuracy: Quartz regulated -- Mounting: Standard socket box -- Power Supply: 220 - 240V AC 50Hz -- For fixed supply wiring only
- Class II Control / Protection Class IP20
- Complies with European Norm EN 60730-1: 2011 Automatic Electrical Controls for Household & Similar Use
- Complies with European Directives: LVD, EMC, RoHS -- Not suitable for direct switching of lighting types: Fluorescent, HID, SON, LED -- Use a contactor for discharge lamps
- Premium quality boost timer
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8
8.3
Optimum
Optimum Energy Saving Electronic Time Switch - 2 Hour Electronic Boost Timer Socket Box Mount - White, One 230 V
Free Shipping
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.
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9
8.1
22.5 Team Controls
Team Controls Timer Boost Switch Immersion Water Heater Electric Towel Radiator Heating & Lighting
Main Highlights
- 2 hour electronic, one-button boost timer
- BOOST SELECTIONS 15 min / 30 min / 1 hr / 2 hr
- Four pre-set timed outputs with visual indicators.
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10
8.1
HBN
HBN 24 Hour Indoor Energy Saving Mechanical Immersion Heater Segment Timer Switch with Waterproof Cover, White, 16 Amps
Free Shipping
Main Highlights
- Easy to Use: Complete instructions provided in packaging. This timer switch can be set for appliances to on/off 48 times a day. You can set your own schedule for when to activate or deactivate the devices.
- Product Features: Wire connection; 48 ON/OFF per day; With load indicator; With ON/OFF/Timing switch knob; With transparent cover; Depth: Min.15MM; Min. Setting time: 15 minutes; Max. Setting time: 24 hours.
- Multi Purpose: Can be used for controlling corridor light system, water pump system, heating/cooling system, security system, advertising board lighting controlling, exhaust system etc.
- Make Your Life More Convenient: This timer switch automatically turns your appliance on and off, eliminating the need to manually switch each time, reducing energy consumption and saving energy costs.
- Satisfaction Guarantee: CE Certificated ensure its safety. Please be assured purchase, this timer would be a good helper for your daily life.
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