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Heatmiser Slimline-E Programmable Thermostat V3
Precision Control for Electric Underfloor Heating
The Heatmiser Slimline-E Programmable Thermostat V3 is a high-performance thermostat specifically designed for electric underfloor heating systems. With compatibility for all electric floor heating systems up to 16A, it ensures precise temperature control, energy efficiency, and ease of use.
Key Features
Smart Self-Learning Preheat: The optimum start function calculates the required heat-up time, ensuring your home reaches the desired temperature exactly when needed.
Temperature Hold Function: Set a custom temperature for a specific duration—once the time expires, the thermostat automatically returns to its regular schedule.
Key Locking for Security: The built-in key lock feature prevents unauthorised adjustments, keeping your heating settings secure and tamper-proof.
Flexible Programming Options: Choose from three programming modes:
Non-programmable mode for manual control
5/2 day mode for weekday and weekend scheduling
7-day mode for fully customisable daily programming
Blue Backlit Display: The sleek blue backlight ensures easy readability while automatically turning off when not in use, conserving energy.
Holiday Mode for Energy Efficiency: Set a specific temperature while you're away, preventing unnecessary heating and ensuring cost savings.
Celsius & Fahrenheit Selectable: Easily switch between °C and °F to match your preferred measurement system.
Built-in Frost Protection: The adjustable frost protection setting prevents freezing temperatures, safeguarding your underfloor heating system.
16A Switch Rating: With a robust 16A (3,680W) switch rating, the Slimline-E can handle high-power electric heating loads with ease.
Floor Sensor for Precision Control: The included floor sensor provides accurate temperature monitoring, ensuring consistent and efficient heating performance.
Multiple Sensor Modes: Select from three sensor options for customised temperature regulation:
Floor sensor only
Air sensor only
Floor & air sensor combination
Technical Specifications
Feature
Details
Max Current
16A
Power Supply
230V AC
Dimensions (L x H x D)
98mm x 85mm x 13mm
Temperature Range
5°C – 35°C
Heating Levels
4
Weight
195g
Probe Options
Floor or Remote Air Probe
Probe Rating
10Kohm
IP Rating
IP20
Easy Installation Guide
Separate the Thermostat Front Panel: Use a small flat-head screwdriver to gently detach the front panel from the backplate via the slots on the bottom face.
Secure the Backplate: Mount the backplate securely into the back box using the provided screws.
Connect the Wiring: Follow the wiring diagram for correct termination of the thermostat connections.
Reattach the Thermostat Panel: Clip the front panel back onto the backplate, ensuring a secure fit.
Important Installation Notes
Do not install near direct heat sources, as this may affect temperature readings and performance.
Do not press hard on the LCD screen, as this may cause damage.
Flush Mounting Requirement
This Slimline Series thermostat is designed for flush mounting and requires a 35mm deep back box to be installed within the wall prior to setup.
Upgrade Your Heating System Today
The Heatmiser Slimline-E Programmable Thermostat V3 offers intelligent heating control, flexible programming, and energy-saving features—making it the perfect choice for electric underfloor heating systems.
At Underfloor Heating Direct, 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:
2-3 working days delivery
Next working day (Order before 4pm Monday - Friday)
Next working day before 12 noon (Order before 4pm Monday - Friday)
At Underfloor Heating Direct, our customers have 30 days to upgrade, replace or refund their orders.
Returns
At Underfloor Heating Direct, 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.
Replacements
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.
Upgrades
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.
At Underfloor Heating Direct, 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 10 year warranty for our electric underfloor heating kits.
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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