Heatmiser Slimline V4 Digital Programmable Thermostat | Multi-Zone Heating Control

Heatmiser Slimline V4 – Programmable Room Thermostat for Multi-Zone Underfloor Heating Systems

Take full control of your underfloor heating with the Heatmiser Slimline V4, a versatile and modern digital programmable room thermostat. Ideal for both individual room control and multi-zone setups, this thermostat combines functionality, energy efficiency, and sleek design into one powerful unit.

Running on 230V mains power, the Slimline V4 offers up to 4 temperature settings per day and supports non-programmable, 5/2 day, 7 day, or 24-hour programming modes — all easily selectable on site.

With features like Optimum Start, Remote Air Sensor capability, and Keypad Locking, this thermostat not only helps reduce energy costs but also prevents unwanted tampering — making it perfect for both residential and commercial use.

Key Features:

• Programmable or Non-Programmable – Switchable on site
• 5/2 Day, 7 Day, or 24-Hour Programming – Flexible scheduling
• 4 Comfort Levels Per Day – For precise temperature control
• Optimum Start Function – Reduces unnecessary heating time
• Self-Learning Technology – Adapts to your building’s thermal response
• Key Lock Function – Prevents accidental changes
• Remote Air Sensor Compatible – For remote temperature monitoring (sensor sold separately)
• Large, Backlit Display – Easy to read, turns off after 30 seconds
• Frost Protection Mode – Helps protect your heating system in cold weather
• Celsius or Fahrenheit Display Options
• Flush-Mounted Design – Modern and discreet
• Dimensions: 99 x 86 x 15mm (L x H x D)

Ideal For:

• Multi-zone underfloor heating systems
• Homes, offices, and commercial buildings
• Retrofitting or upgrading existing 230V thermostats
• Rooms needing remote temperature sensing (e.g., bathrooms)

Recommended Accessories (Sold Separately):

• Sensor Probe / Thimble Sensor – For remote air sensing or bathroom use
• UH4 / UH8 Wiring Centres – For 4 or 8 zone configurations
• Electrothermic Manifold Actuators – One required per manifold port

Installation Tip:

For bathrooms, install the thermostat outside the room and pass a remote sensor probe through the wall for accurate and safe temperature reading.

Frequently Asked Questions:

• Can I use the Slimline V4 in a multi-zone setup?

Yes. Install one Slimline V4 thermostat per zone or room. For wiring, use a UH4 (4-zone) or UH8 (8-zone) wiring centre with electrothermic actuators.

• Is it compatible with remote sensors?

Yes, it supports remote air sensing. A Sensor Probe or Thimble Sensor can be connected to the back of the thermostat for this functionality.

• Does it have a lock to prevent tampering?

Yes, the keypad can be locked to prevent settings from being changed.

• What programming modes are available?

The Slimline V4 supports non-programmable, 5/2 day, 7 day, or 24-hour programming, adjustable via the software during installation.

• Can I use this to replace an existing mains-powered thermostat?

Absolutely. It's an ideal upgrade path for those replacing an old 230V wired thermostat.

• What is the Optimum Start feature?

Optimum Start automatically adjusts the heat-up time based on your building’s conditions, reducing energy waste.