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5iE Wireless Smart Thermostat

Warmup’s 5iE Wireless Smart Thermostat is our latest innovation in Smart home heating management. Our only heating controller specifically designed for central heating, the 5iE works with your comfort in mind whilst reducing energy inefficiency – saving you up to £378 on your annual energy bills.

Available to UK customers only, exclusively through our online store.

£224.99 or £299.99 with professional installation and set up


Smart Central Heating Control

The 5iE Wireless Smart Thermostat works with central heating and hydronic underfloor heating systems and is a result of 20 years of innovation and research on efficient heating by Warmup. The advanced technologies within the 5iE automatically control your heating for you and work alongside Warmup’s MyHeating™ app which, when used alongside Warmup’s AutoSwitch™ app, can save you up to £378 per year on your energy bills.

 Use with your existing boiler and radiators

The 5iE’s stand mounted display can be placed anywhere in your home and communicates wirelessly with your boiler via the included Boiler Receiver unit – an advanced piece of technology that assists in bringing your ideal room temperature to wherever you are in your home. Working with our free-to-download MyHeating app, the 5iE Wireless Smart Thermostat controls your heating automatically with our built in SmartGeo™ technology – allowing the 5iE to learn your routines and monitor your heating schedule. Intuitively learning when you are leaving and returning home, this means you will never come home to a cold house again whilst also reducing your energy usage and bills by up to 25%.

 Saving you money

Warmup’s AutoSwitch app complements the 5iE and MyHeating app by ensuring you never overpay an energy bill again through tariff switching. 80% of the UK’s population is paying too much for their energy usage because suppliers usually increase rates after the initial twelve-month ‘Welcome Period’. Using AutoSwitch allows you to automatically switch energy suppliers effortlessly, every year, so that you never overpay for your energy usage again – saving you up to £210 per year, on top of the 25% savings on your heating bills you can make as a 5iE user.

Cost savings

Saves you up to £378

Using the 5iE with Warmup’s partner Apps, MyHeating and AutoSwitch, can save you an average of £378 on your energy bills annually. Work out how much you could save with our Heating Savings Calculator below.

5iE - Works on all Smartphones

Easy to Use

The 5iE Wireless Smart Thermostat connects wirelessly to your central heating system and you can have the 5iE installed and setup by one of our trained experts in as little as 4 days from delivery.

Book an Installation >

Works with Your Smartphone

The 5iE works with the MyHeating™ app available on the Google Play Store and the App Store.

If you don’t use Android or iOS, we’ve got you covered, simply control your system from the my.warmup web portal.

my.warmup web portal >

5iE digital central heating thermostat features

5iE Features

The 5iE Wireless Smart Thermostat has been designed to complement and expand on the fantastic features of the award-winning 4iE, by giving compatibility with standard central heating systems. The addition of the wireless Boiler Receiver and Power Base transforms the standard 4iE into a smart wireless control for central heating systems. The unique features of the 5iE used together with Warmup’s MyHeating app deliver you optimised, automatic heating and continuous cost-savings.


Warmup’s unique innovation SmartGeo controls your heating for you; intuitively and automatically. The SmartGeo feature is based on two technologies:

  • The location services built into smartphones
  • Capability of learning your routines

The sophisticated algorithms of SmartGeo ensure an accurate and optimised heating schedule for your home.


AutoSwitch searches for the best energy tariffs available and gives you the opportunity to switch energy suppliers automatically, every year – saving you an average of £210 annually. Never overpay an energy bill again.

Learn more about the Autoswitch app here >

MyHeating app

The 5iE works with your free MyWarmup account and the free MyHeating app, giving access to unique features like SmartGeo.

The MyHeating app is designed to be easy to use with Natural Language Programming. The setup is quick and easy to use.

Learn more about the MyHeating app here >

Saving you up to £378 per Year.

Over the past 4 years, UK households have paid £8.5 Billion too much for their energy. This is because when you sign up with an energy supplier, you will get their best tariff for the first twelve months just to get you on-board. After that initial contract period is up, you are automatically moved to their standard rate – often at a significantly higher price. AutoSwitch works in the background to keep you on the lowest tariff every year, effortlessly and automatically – saving you an average of £210 per year.

Using your new 5iE alongside Warmup’s MyHeating App and SmartGeo technology is the most efficient way of heating your home. The MyHeating app communicates with the 5iE, letting it know how far you are from home to ensure the house is comfortable when you arrive. This, combined with the routine-learning abilities of the 5iE, allows the 5iE to only use energy when you need it, and never waste any when you don’t – saving you up to £168 per year.

The combined savings of using the 5iE alongside AutoSwitch and MyHeating can be up to £378 per year.

warmup thermostat app for energy and heating bills saving

Heating Savings Calculator


Personalise Your 5iE Thermostat

Customise your 5iE with uploadable photo backgrounds on the full-colour display.
Choose from a range of textured Overlays in realistic metal and wood effects or upload a custom design to give your 5iE a unique look.

Use the personalisation options in the MyHeating app to change the look of your 5iE. You can try out different custom backgrounds and themes with a live view of your actual device on the screen.
You can even point the camera on your phone at different surfaces to see how your customised device will look on different wall coverings.


Connect the 5iE with your Smart Home via IFTTT

The 5iE Wireless Smart Thermostat is compatible with IFTTT (If This, Then That) – allowing you to link the 5iE with your home’s existing Smart technologies such as the Amazon Echo or Google Home. View our Applets or create your own, to make your home truly a Smart Home.

5ie thermostat drawing design


Compatible systems include Combi, System, LPG boilers, heat pumps, or similar. Any heat source which requires one of the following;

230V AC normally opened

230V AC normally closed

Volt-free normally opened

Volt-free normally closed

Low voltage input not to exceed 3A.

The boiler manufacturer or manual will be able to confirm if your boiler is compatible

Dimensions (Assembled with 4iE face) 90 x 120 x 18mm
Screen Size 3.5″
IP Rating IP33
Operational Temperature Range 0°C – 50°C
Operational Humidity Range <95% RH
Dimensions (Assembled with Thermostat) 120 x 121.4 x 63.3mm
Power Supply 5V DC, 300mA
IP Rating IP30
Operational Temperature Range 0°C – 50°C
Operational Humidity Range <95% RH
Dimensions 86 x 86 x 26.5mm
Power Supply 230V AC, 50Hz
 IP Rating IP40
Maximum Relay Load 3A, 250V
Operational Temperature Range 0°C – 50°C
Operational Humidity Range <95% RH
Fuse T1.6A, 250V
RF Range (Open Air) Max. 500m
Communication Band 868 MHz
Radio Frequency Standards EN 301 489-1 v1.9.2 / EN 300 220-2 v2.4.1 / EN 62479:2010 / EN60950-1:2006/A2:2013

Click below if you are experiencing issues with the 5iE equipment such as the Thermostat face of the Boiler receiver

Troubleshooting Guide ➤

Frequently Asked Questions

Can I select a different background image for the thermostat ?

Yes! Not only can you change the background image, but you can upload your own. This can be done either via the app on your smartphone, or via the my.warmup.com online portal

My 5iE thermostat is displaying “Er 1”, what does this mean ?

The temperature sensor is set incorrectly, set the sensor to “Air”. To do this via the thermostat interface, go here: settings> heating preference> control air/floor> air

Where can I find the ‘Device Number’ for registering a room ?

The device number is the thermostat’s unique identification number. It can be found here: settings> advanced settings> about> info

Why can I only turn the temperature as high as 27°C ?

1. You may have set your thermostat to “Air Mode”. The maximum set temperature in air mode is 30°C. The maximum floor temperature, however, can be set to 40°C by setting it to ‘Floor Mode’.

2. Have you registered a certain floor type when setting up your device? The thermostat restricts the temperature automatically in ‘Floor Mode’ from not exceeding an ideal temperature for certain floor surfaces. For example, the temperature for wood, laminate, and vinyl should not exceed 27 degrees because higher temperatures may affect these more delicate floor surfaces. Tiled floors can be set to 40°C.

Does the boiler receiver need to be mounted near the boiler ?

 Before making any permanent fixtures Warmup recommends ‘Paring and Testing’ the Boiler Receiver and Power Base. This will ensure the wireless connection is not subject to range or interference issues once installed. Click here to see how

Is it easy to move my 5iE once it has been installed ?

Using the included stand, the 5iE Powerbase / Thermostat can be moved to any room you wish, range depending.

Can I mount the Powerbase/thermostat on a wall ?

 Yes you can – Click here for more information.

The standard USB cable is too short, to reach my socket, what can I do ?

 Use any standard CE marked micro USB cable.

How do I know if the 5iE is compatible with my heating system setup ?

 The 5iE is compatible with the majority of heating systems such as C plan / S plan / S plan plus etc.

Click here to see our detailed wiring diagrams

How is the Boiler Receiver connected to the boiler?

 All wiring for the 5iE should be completed by a competent qualified electrician. The wiring configurations vary depending on the system type. If you are unsure of your system type please scroll down for our compatibility guide.

Alternatively Click here for all of the wiring diagrams.

Can I have more than one 5iE kit within the same property ?

 Multiple boiler receivers can be configured by changing the addresses of the Powerbases.

See here for more information.

What happens to my current programmer / controller ?

 If your homes uses a hot water tank as opposed to a combination boiler and your current programmer controls the heating and hot water, it will still be required for the hot water programming. It should be set to constant for heating and the 5iE will then control the boiler on-off schedules.

My 5iE is indicating the heating is on but the boiler is not working ?

 Check the boiler receiver for the LED pattern

Click here for detailed guide

My thermostat has been damaged. How do I use my heating ?

 Have no fear, the Boiler Receiver can be used for manual control of your boiler.

Click here to see how

Will my heating still work if my internet goes down ?

 Yes, it will. The boiler receiver that comes with the 5iE can control the heating if the web portal or app is down. See the Troubleshooting guide here for more information.

What do I need to do if I change my router or network password ?

 To update the Network password see here; settings> network> ‘select network’> ‘accept’> ‘enter new password’.