Onesto Thermostat UFH 4x2

• An elegant and user-friendly temperature controller from the premium Onesto Oracle range, designed specifically for managing electric underfloor heating (UFH) systems.
• This is a complete, ready-to-install thermostat, combining a 16A-rated switching mechanism with a simple rotary dial for precise temperature regulation.
• Provides accurate control over your floor's temperature, typically adjustable between 10°C and 40°C, ensuring optimal comfort and energy efficiency.
• Features a clear LED indicator light that illuminates when the heating system is active, providing immediate visual feedback.
• Embodies the sophisticated Oracle design language, featuring an ultra-slim 8.5mm profile and soft, Italian-inspired curves to ensure your climate controls match your light switches and sockets.
• Constructed from high-impact, UV-stabilised polycarbonate for exceptional durability and a lasting premium finish.
• Backed by a comprehensive 5-year warranty, making it the professional choice for a reliable, safe, and stylish UFH control solution.

Features

• Application: Specifically designed for the control of mains-voltage (230V) electric underfloor heating mats and cables.
• High Power Rating: Features a robust 16A internal switch (contact rating), capable of directly controlling up to 3.6kW of heating load, suitable for most residential rooms.
• Intuitive Rotary Control: An easy-to-use rotary dial allows for simple and precise adjustment of the desired floor temperature.
• Clear LED Status Indicator: A built-in LED light provides a clear visual indication, showing when the thermostat is calling for heat and power is being supplied to the floor.
• Standard 4x2 Format: Designed to fit perfectly into any standard 4x2 (102mm x 51mm) wall box.
• Signature Oracle Aesthetics: Boasts the premium Italian-inspired design with an ultra-slim 8.5mm profile for a modern, low-profile look.
• Superior Material Construction: Manufactured from high-impact, self-extinguishing, and UV-stabilised polycarbonate.
• Certified for Safety: Fully compliant with relevant electrical safety standards for temperature control devices.
• Long-Term Reliability: Supported by a comprehensive 5-year manufacturer warranty.

Benefits

• Optimal Comfort & Control: Allows you to precisely set and maintain your desired floor temperature, transforming cold floors into a source of luxurious, radiant warmth.
• Energy Efficiency: By accurately regulating the temperature and preventing overheating, the thermostat helps to minimize electricity consumption and reduce energy bills compared to a simple on/off switch.
• Aesthetic Cohesion: Eliminates the need for generic, industrial-looking thermostats. This unit perfectly matches the elegant design of the Oracle range, ensuring a seamless look across all your wall-mounted electrical accessories.
• Simple & Intuitive Operation: The classic rotary dial is straightforward and easy for anyone to understand and operate, with no complex programming required.
• At-a-Glance Status: The clear LED indicator lets you know instantly if your underfloor heating system is active and drawing power.
• Durable and Long-Lasting: The high-quality polycarbonate construction resists impacts and discoloration, ensuring the unit remains pristine for years.

In-Depth Technical Specifications

The Onesto Thermostat UFH 4x2 is engineered for reliable and safe control of underfloor heating systems. The following table details its complete technical specifications.

Ideal Use

This thermostat is the ideal control unit for standard electric underfloor heating systems in various residential and light commercial settings.

• Bathrooms & En-suites: Perfect for taking the chill off cold tiled floors, adding a touch of luxury and comfort.
• Kitchens & Dining Areas: Provides comfortable, radiant warmth in tiled or laminate flooring areas.
• Bedrooms & Living Rooms: An excellent solution for providing gentle background heat and creating a cozy environment.
• Home Offices: Ensures a comfortable working environment, especially in rooms with cold flooring.
• Any room with an electric UFH system up to 16A (3.6kW) that requires simple, reliable manual temperature control.

Tips

The correct installation and operation of a thermostat are critical for the safety and efficiency of your underfloor heating system.

• CRITICAL - MUST BE INSTALLED BY A QUALIFIED ELECTRICIAN: This product controls a high-power heating circuit and interfaces with a floor sensor. Installation MUST be performed by a certified electrician in strict accordance with SANS 10142-1 and the heating manufacturer's instructions.
• FLOOR SENSOR IS ESSENTIAL: This thermostat requires a floor temperature sensor (usually a 10kΩ NTC probe) to be installed in the floor to function correctly. This sensor is typically supplied with the underfloor heating mat/cables, not with the thermostat itself. The electrician must install this sensor correctly in a conduit within the floor screed.
• DO NOT EXCEED MAXIMUM LOAD: The electrician must calculate the total wattage of the connected underfloor heating system to ensure it does not exceed the thermostat's 16A (3600W) rating. Larger heating zones may require a contactor.
• INSTALLATION LOCATION: The thermostat should be installed on an interior wall, at a convenient height (approx. 1.5m), away from direct sunlight, drafts, or other heat sources (like radiators or ovens) to ensure accurate temperature readings.
• NOT FOR WATER-BASED SYSTEMS: This is an electronic thermostat designed for electric resistance heating cables. It is not suitable for controlling hydronic (hot water) underfloor heating systems, which require different control mechanisms.