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Does the 4iE have a battery backup?

4iE Smart WiFi Thermostat

The 4iE is a Smart WiFi 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 $215 RRP

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


Always at the right temperature

Easy to use programming ensures that the 4iE is operating around your schedule.


Easy to use

The 4iE’s heating controls are easy to use. 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.

Underfloor heating thermostat

The 4iE 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.

 Maximizes your home’s energy-efficiency

The 4iE gives total heating control in each room. Cut energy bills by heating spaces only as you occupy them.

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

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Smart Thermostats

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

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