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Heatmiser Slimline-W Programmable Thermostat

Was £58.00
From Was £58.00
Was £58.00
Now £44.99
From £44.99
Now £44.99
Save £13.01 Save £13.01
in stock, ready to be shipped
Heatmiser Slimline-W Programmable Thermostat
From Was £58.00
Was £58.00
From £44.99
Now £44.99
Contact us

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Help, advice or want us to beat a price? Call us on 01268 567016

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For delivery on Tuesday

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Elevate your heating control with the Heatmiser Slimline-W Programmable Thermostat. This 230v thermostat combines the functionality of a room stat and a programmer, offering convenient and efficient temperature control for your home.

Key Features:

  • Programmable Functionality: The Slimline-W thermostat allows you to set up to 4 different temperatures at different times of the day, ensuring optimal comfort throughout your daily routine. This flexibility enables energy savings by heating your home only when needed.
  • Self Learning Preheat: With the self-learning preheat feature, the thermostat calculates the required heat-up time to reach your desired temperature at the scheduled time. This intelligent function optimizes energy usage and ensures a warm and comfortable environment when you need it.
  • Temperature Hold Facility: The temperature hold feature allows you to set a specific temperature for a desired duration. Once the set time has elapsed, the thermostat will return to its normal programming, maintaining energy efficiency and comfort.
  • Key Locking: All Slimline models come with key locking functionality to prevent tampering and unauthorized changes to the heating system. This ensures that your programmed settings remain intact and secure.
  • Flexible Programming Options: The Slimline models offer flexible programming options, including non-programmable, 5/2 day, and 7-day programming. You can choose the programming mode that best suits your specific requirements and lifestyle.
  • Blue Backlight: The Slimline series features a blue backlight, providing clear visibility of the display. The backlight automatically turns off when not in use, conserving energy and reducing visual distractions.
  • Holiday Feature: Going on vacation? The thermostat includes a holiday feature that allows you to set a different temperature while you're away, helping you save energy and ensuring a comfortable return.
  • °C / °F Selectable: Choose your preferred temperature unit with the option to switch between Celsius and Fahrenheit.
  • Frost Protection: The thermostat includes a frost protection feature with an adjustable temperature setting, preventing freezing and potential damage to your heating system during colder periods.

Upgrade your heating control with the Heatmiser Slimline-W Programmable Thermostat and enjoy personalized comfort and energy efficiency tailored to your lifestyle.

Max Output Volt Free 3A Max
Supply 230v
Dimensions (L,H,D) 99x86x15mm
Temperature Range 05-35°C
No. Heating Levels 4
Optional Probe (not included) Floor or Thimble Sensor
Probe Rating 10Kohm
IP Rating IP20
  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 to 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.

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Product Question? Need help placing an order?

Our customer support is available Monday to Friday 7am-6pm.

Call us on 01268 567 016

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Free delivery on all orders

At The Underfloor Heating Store, we strive to make every step of your order as easy and convenient as possible, from finding the right underfloor heating setup to best suit you to taking delivery of your system the very next day.

We're proud to offer a range of delivery options to suit you, including free delivery on all of our orders or next working day delivery for a fixed price of £4.99

  • 2-3 working days delivery - FREE (Order before 4pm Monday - Friday)
  • Next working day - £4.99 (Order before 4pm Monday - Friday, applies to orders over £19.99)
  • Next working day before 10.30am - £14.99 (Order before 4pm Monday - Friday)
  • Saturday delivery - £29.99 (Order before 4pm Monday - Friday)

Explore our full delivery policy

30 days returns policy

At The Underfloor Heating Store, our customers have 30 days to upgrade, replace or refund their orders.


At The Underfloor Heating Store, we want to ensure you are happy with every purchase you make. If you have any issues with your chosen product, whether damaged, faulty or simply an unwanted item, you can simply return what you bought for a refund. Learn more.


We take great care in the delivery of all of our products, however, in the event of your delivery arriving damaged or if you notice a manufacturing fault of any kind within 48 hours of delivery, you're within your rights to a replacement. Learn more.


Within 14 days of purchasing from us, you are eligible to upgrade if you deem you want something a little better. Simply send it back to us brand new and we'll happily assist you with an upgrade to your order. Learn more.

Lifetime warranty

At The Underfloor Heating Store, we are committed to providing our customers with high-quality products and outstanding customer service. That's why we offer a comprehensive warranty on all of our underfloor heating products, with a lifetime warranty for our ProWarm range of products.

Our warranties are designed to give you peace of mind and ensure that your underfloor heating system operates reliably for years to come.

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We'll beat any price

At The Underfloor Heating Store, our main priority is customer satisfaction. To cement our commitment to this, we are proud to offer our Underfloor Heating Price Match Promise. If you find a lower price on an identical product anywhere else, we will match it – guaranteed!

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