

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.
Price
from $223 RRP
Never come home to a cold house or overpay on your energy bills again.

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
Alexa
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 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 |
Compatibility
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.