Heatmiser Slimline-E, Programmable Thermostat

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RRP: £157.49

Our Price: £45.99 inc VAT

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Product Details

Product Details

The Heatmiser Slimline-E is a programmable thermostat specifically designed for electric underfloor heating systems. It is compatible with all electric floor systems with a total load of less than 16A, ensuring efficient control of your underfloor heating.


  • Self Learning Preheat: The Slimline-E thermostat features optimum start, a smart function that calculates the required heat-up time for optimal comfort.
  • Temperature Hold Facility: Enjoy the convenience of setting a desired temperature for a specific duration with the temperature hold feature. Once the set time has expired, the thermostat will return to its normal program.
  • Key Locking: The thermostat comes with key locking functionality, reducing the risk of tampering with the heating system and maintaining desired settings.
  • Flexible Programming: Choose from non-programmable, 5/2-day, or 7-day programming options to suit your specific needs and preferences.
  • Blue Backlight: The Slimline-E thermostat incorporates a blue backlight that automatically turns off when not in use, providing clear visibility without unnecessary energy consumption.
  • Holiday Feature: Enjoy the convenience of a holiday feature that allows you to set a specific temperature while you are away, ensuring energy efficiency and preventing unnecessary heating.
  • ðC / ðF Selectable: Easily switch between Celsius and Fahrenheit temperature units to match your preferred measurement system.
  • Frost Protection: The thermostat includes an adjustable temperature setting for frost protection, preventing freezing and maintaining the integrity of your underfloor heating system.
  • 16A Switch Rating: With a switch rating of 16A (3,680 watts), the Slimline-E thermostat can handle the power requirements of your electric underfloor heating system.
  • Floor Sensor Included: The thermostat comes with a floor sensor, ensuring accurate temperature measurement and control.
  • Floor, Air or Floor and Air Sensors: Choose between floor, air, or a combination of floor and air sensors to monitor and control the temperature according to your preference.
Max Current16A
Dimensions (L,H,D)98x85x13mm
Temperature Range05-35C
No. Heating Levels4
Probe OptionFloor or Remote Air Probe
Probe Rating10Kohm
IP RatingIP20
  1. Carefully separate the front half of the thermostat from the back plate by placing a small flat head terminal driver into the slots on the bottom face of the thermostat.
  2. Place the thermostat front somewhere safe. Terminate the thermostat as shown in the wiring diagram above.
  3. Screw the thermostat back plate securely into the back box.
  4. Clip the front of the thermostat back onto the thermostat back plate.

Important: Do not install near a direct heat source as this will affect functionality.

Important: Do not push hard on the LCD screen as this may cause irreparable damage.

This Slimline Series thermostat is designed to be flush-mounted and requires a back box of 35mm (minimum depth) to be sunk into the wall prior to installation.



Our delivery charges are calculated based on the weight of your entire order. Below is a table illustrating the cost for each weight bracket.

Weight From (kg) Weight To (kg) Cost
0 19.99 £0
20 39.99 £5
40 59.99 £10
60 79.99 £15
80 99.99 £20
100+   £25

Please note all orders under £20.00 will incur a £5.00 delivery charge.

In addition to our standard delivery service, we can also arrange for delivery on a Saturday or before 10.30am on any working day. This level of carriage comes at an additional cost:

  • Next working day before 10.30am - Additional £9.99
  • Saturday - Additional £24.99

When will I receive my order?

All efforts are made to ensure your qualifying order reaches you on the next available working day before 7.00pm, as long as you place your order with us by 4pm (Monday to Friday).

All orders received after 4pm on a Friday (including weekend orders) will be despatched on Monday for a Tuesday delivery. Bank holidays are treated in the same way as a non-working day.

Please note that we cannot guarantee delivery at a certain time and occasionally, circumstances beyond our control or that of the courier’s may mean your delivery is delayed. Though a rare occurrence, sometimes a delivery arrives late, meaning that tradesman are unable to continue with a project.

We cannot be held responsible for any costs incurred as a result of a delayed delivery, and we would always recommend that customers ensure the materials required by their contractors are on site prior to the commencement of any work. We take pride in the prompt despatch of our products, but we do rely on third-party couriers to deliver on our behalf. There are occasions when traffic, weather or unusual events can cause delays.

If your product has been delayed, we will do our best to keep you informed using our tracking service, and advise you of any estimated time and date of your delivery.