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4iE Wi-Fi Smart Thermostat

The smartest smart thermostat, with the biggest savings. Perfect for upgrading your existing central heating. Automatically finds the smart ways to heat your home efficienctly, and switching you to better energy deals.

The right temperature.

The best tariff.

Effortlessly.

  • 4iE thermostat

Always at the right temperature

SmartGeo™ makes sure your home is automatically warm just as you arrive, and running efficiently when you’re away, just like magic.

Always on the best tariff

With the EasySwitch™ automatic tariff switching service means that you will never have to overpay on your energy bills again

Simple to set up and easy to use

The 4iE is easy to use and doesn’t require programming. It connects to your WiFi easily, and set-up can be completed with a few simple steps.


Wireless control from any place

  • 4iE control
  • 4iE control mobile
The free MyHeating app works with iOS and Android to give you access to SmartGeo and quick control of your system. Use my.warmup.com with any desktop or mobile web browser to manage your account, control your heating, and view your energy usage with no subscription required.

Always at the right temperature with SmartGeo

  • 4iE smart geo
The 4iE can control your heating automatically and reduces your heating usage by up to 25%. 

It works by using the location services built into smartphones, as well as learning your routines and the most efficient settings for your home.
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So your heating is always at the right temperature, effortlessly. Your home is automatically warm as you arrive, and running efficiently when you’re away. Just like magic.

High quality design & engineering


The 4iE is designed to look great in both modern and traditionally styled homes, with glass effect front faces and bevelled chrome edges to reflect wall colours.

A range of vinyl overlays are available in bold colours and textured metal and wood effects. You can even use a custom photo to complement your wallpaper.
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The large colour touchscreen can be customised with different themes and uploadable photo backgrounds. There’s even a 7 day local weather forecast, and traffic alerts built in.
  • i4E designs

Always on the best tariff with EasySwitch

The 4iE works in the background to find the best energy deals. 
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EasySwitch searches the market for better energy tariffs, recommends the best deals, and makes it easy to switch. 

EasySwitch can even be set to switch you on to the best tariff automatically, so you’re always getting the best deal, effortlessly.

4iE technical sheet

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App for iOS
App or Android
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