Item Description

Available exclusively from Warmup, the 3iE™ is the world's first fully interactive, touch technology, energy monitor thermostat. The 3iE now comes with a thinner and more resilient floor sensor for easy installation. Featuring advanced energy monitoring, the Warmup 3iE™ allows you to view actual graphs of your recorded energy consumption against costs. That means you know exactly what your underfloor heating running costs are. The Warmup 3iE™ is also the first programmable underfloor heating thermostat to come with Active Energy Management™, which can save you up to 10% on your energy bills by actively prompting you to test lower energy consumption levels. Available in the following colours: Classic Cream, Piano Black, Silver Gray, Leaf Green, Madison Blue, Deep Pink and Warm Berry.

Warmup's new Extended Lifetime Warranty is now available on the Warmup 3iE Energy Monitor Thermostat range.

Now you can upgrade to a lifetime of protection (the lifetime of the 3iE is 25 years) and peace of mind for as little as £29.99 (includes VAT) per thermostat from participating retailers. Any replacement of the underfloor heating thermostat is also covered by the Warranty and is fully transferable.


  • First touch-thermostat with a 2" full-colour screen
  • First underfloor heating thermostat with Active Energy Management™
  • Easy-to-use user interface - no instructions required


  • Graphical display of your programme makes adjustment quick and easy
  • Choose the display type that suits you best; wide choice of screen themes


  • Automatically adjusts to changing conditions in your room, your home and even the seasons, to give optimal start-up times - no wasted energy (self-learning Proportional Adaptive Function)


  • Exclusive - Active Energy Management™ can save you up to 10% or more on your energy bill
  • Real-time graphical display shows you exactly how much energy you are using and when

Why Buy From Us?

We pride ourselves in supplying the highest quality products and offering the best customer service in the industry, with over 100,000 positive reviews, we can safely say our customers agree.

We offer free UK shipping and have an easy returns policy should our high quality products not met your requirements.

Award Winners

We have gained several industry accolades: -

  • Winners of the Essex Business Awards 2012
  • Finalists in The National Business Awards
  • Finalists in the UK Customer Satisfaction Awards
  • Winners of the Essex Business Awards 2013
  • 52nd in the Fast Track 100 awards

Our Products have been featured on BBC's DIY SOS and Channel 4's The Home Show

Excellent Support Team

All our phone technical staff are qualified electricians. We sell electric and water underfloor heating and also underfloor insulation board, flexible adhesives and levelling compounds. We are registered with many underfloor heating Trade Associations and are regularly inspected for our quality of service.

Unique Showroom

Our underfloor heating showroom is the only one of its kind in the UK. Inside you will find fully functioning electric underfloor heating systems as well as water underfloor heating, boilers, radiators and towel rails.

We also have a wide range of thermostats and wifi controlled networked systems that can be operated via your phone, tablet or PC.

Not just a quality product...

Our service extends beyond simple supplying the product. In addition to a great price, when you buy from us you also benefit from super fast delivery, expert technical advice from passionate, qualified staff, ongoing customer support and so much more.

There are many other ebay sellers that try to imitate us.... and fail. Make sure you buy from the nations favourite...

The Underfloor Heating Store

Call us on 0800 077 8374 if you have any questions, we are happy to help



 Warmup 3iE Thermostat installation manual

Download the Warmup 3iE Thermostat installation manual.

download now 
 Warmup 3iE Thermostat operating manual

Download the Warmup 3iE Thermostat operating manual.

download now 


Supply voltage 220-240V, 50Hz
Load 16A
Floor probe length 3m
Sensors floor / air / external
Battery back up 60 minutes
Dimensions (H/W/D) 90 x 110 x 30 mm
Screen Dimensions 35 x 50 mm
IP rating IP20/IP32* (*with optional gasket)
Approvals ASTA BEAB
Warranty 3-Year,Extended Lifetime Warranty available


Not applicable for this item



How Much does it cost?

As standard we offer FREE NEXT WORKING DAY DELIVERY to all UK mainland addresses (excluding Channel Islands & Eire ) on all heating products. (This does not include tiling materials, Lustrolite wall panels, wet room screens & heat pumps). Delivery outside of mainland UK may be arranged by prior agreement. You will be notified of the carriage amount and will at that point be able to make a decision as to whether you wish to proceed with your order or claim a refund.

Service types available:

* Please note all orders must be placed before 2pm in order to receive the service stated below *

EXPRESS 24EXPRESS 10Saturday Delivery
(Standard Next working day up to 7pm) (PRE 10.30AM) (AM Delivery)
FREE £15.00 £30.00

Orders placed before 2pm on any business day (Monday – Friday) excluding Bank Holidays should be delivered on the next business day (Excluding Saturday, unless the carriage is met) anytime up to 7.00pm.

Our standard next working day delivery does not guarantee next day delivery; however every effort is made by us and the courier to achieve this goal.

Orders taken on Friday after 2pm, Saturday or Sunday will be dispatched on Monday (excluding Bank Holidays) for delivery on Tuesday up to 7.00pm.

Orders placed on Friday before 2pm will be dispatched on Friday for delivery on Monday up to 7.00pm unless the Saturday delivery charge is met (This excludes Bank Holidays).

Please note; we rely upon the services of third party couriers and, whilst we endeavor to always deliver in a timely manner, there are unfortunately a few occasions when the couriers fail to deliver on the appointed day. This happens rarely, but because it does occur, albeit occasionally, we cannot be held responsible for the late delivery of an item, or any costs incurred by customers tradesman unable to work, please ensure you have your materials before booking in any trades.

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