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4iE Smart WiFi Thermostat

The 4iE is a Smart thermostat that works with you to provide an optimal, cost-effective and energy-efficient heating system. For use with electric underfloor heating systems and electric baseboard heat, the 4iE does not require programming and uses Warmup’s latest technologies to ensure your home is always at the desired temperature, at the right time.

Variations have been offered in the past. Currently, Warmup is only selling the non-WiFi 4iE.

from $223 RRP

Never come home to a cold house or overpay on your energy bills again.


Always at the right temperature

SmartGeo™ technology makes sure your home is automatically warm just as you arrive and running efficiently when you’re away. Only with WiFi version of the 4iE.


Easy to use

The 4iE’s heating controls are easy to use and it doesn’t require programming. The set-up can be completed within a few simple steps.

For Underfloor heating systems

Your Smart Underfloor Heating Thermostat

Easy to use and fully compatible with Warmup’s electric floor heating systems, the 4iE Smart Thermostat saves you energy and money.

 An app-controlled WiFi underfloor heating thermostat

The 4iE is an app-controlled WiFi heating thermostat that maximizes the energy-efficiency of a floor heating system. Underfloor Heating is much more efficient in heating a home than traditional systems by running at lower temperatures to gently reach optimal warmth. Combining underfloor heating with the 4iE allows automatic, intuitive control of heating for a truly Smart home.

 Maximizes your home’s energy-efficiency

Making sure your home’s floor heating is gently warmed for when you need it and running at lower temperatures when you don’t, the 4iE and its SmartGeo* technology cuts down on energy wastage, thereby reducing your energy costs too. Using the 4iE alongside Warmup’s MyHeating app to view usage and cost graphs can save you up to 25% a year on your annual energy bills. The 4iE does not know your actual location, only how far away from home you are, and all data is kept secure and encrypted. (*WiFi version only)

Smarter UFH Control

 MyHeating App

The SmartGeo™ technology within 4iE’s partnered MyHeating app controls your heating automatically by knowing how far from home you are and warming your home in time for your arrival. This prevents energy wastage and can save you up to 25% on your energy bills.

Learn more about the MyHeating app here


The Warmup® 4iE Smart WiFi thermostat that you know and love is now compatible with Amazon Alexa in North America. With Amazon Alexa integration, controlling your floor heat is now easier than ever.

Learn more about the Alexa compatibility here

 IFTTT connectivity

The 4iE underfloor heating thermostat is also compatible with other home automation systems like the IFTTT platform.

Learn more about the IFTTT compatibility here

(Not compatible with non-WiFi version)

Check out the 6iE Smart WiFi Thermostat

The 6iE is Warmup’s newest Smart thermostat, which is currently available with WiFi capabilities. If you want a new thermostat that will use SmartGeo™ technology, and connect to the MyHeating App, Alexa, and other home automation platforms, the 6iE is the device for you.

Technical Information

Technical Documentation
Technical Specifications
Dimensions (H/W/D): 90 x 110 x 18mm
Sensors Air and floor/ambient (can be extended to 50m)
Installation depth 35 mm back box
IP rating IP33
Er-P Class IV
Guarantee 3 years

120V-240V Dual Voltage w/ built-in Class A GFCI
Compatible with Electric Floor Heating and Baseboard systems. Built-in 15A can be extended with RL-240-25A and RL-120-25A relays for an additional 25A load switching capability.
For lower voltage, or volt-free systems, a contactor must be used


Smart Thermostats

Warmup Smart Thermostats make heating your home effortless, using innovative technologies to learn your routines.

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