The Architecture of Control

At Whisper Controls, we know that in the modern heating landscape, the wiring centre is no longer just a junction box; it is the intelligent heart of a high-efficiency system. We are proud to launch the KF-650 Essence, a control unit engineered to be the "central command" for your underfloor heating projects.

Designed for precision control of up to 8 independent zones, the KF-650 is built to streamline installation while maximising system stability for both commercial and high-end residential applications.

The Whisper Ecosystem: A Complete Solution

The KF-650 is designed to sit at the core of a fully integrated heating ecosystem. While it acts as the logic interface, its true value is unlocked when paired with the wider Whisper Controls range.

• Seamless Actuator Integration: The unit offers centralised control for thermal actuators, ensuring precise flow regulation to your manifold loops. With capacity for up to two actuators per zone, it effortlessly manages complex multi-loop rooms.
• Universal Heat Source Compatibility: Whether your project utilises a standard boiler or a modern heat pump, the KF-650’s dedicated Volt-Free Heat Source connection ensures seamless integration without the need for extra relays.
• Zone Control: Designed to work in harmony with our smart or digital programmable room thermostats, the KF-650 ensures heating is delivered strictly to occupied spaces, satisfying modern energy efficiency mandates.

By sourcing your complete control setup—wiring centre, actuators, and thermostats—from a single supplier, you ensure total component compatibility and a smoother handover. This gives you a single point of purchase and, crucially, one dedicated contact for all pre- and post-installation support.

Why Switch to the KF-650?

For specifiers and installers, the KF-650 offers distinct commercial advantages designed to reduce time on site and eliminate call-backs:

• Protect Your Assets: The integrated Pump Delay function (configurable to 0, 3, 4, or 5 minutes via dip switches) prevents "dead-heading" the pump against closed valves, significantly extending the lifespan of your hydraulic components.
• Visual Diagnostics: The front panel features distinct LED indicators for Power, Pump, Heat Source, and Zone Activity. This transparency drastically reduces time spent on commissioning and snagging, lowering your overall project delivery cost.
• Installation Speed: Designed with "First-Fix" efficiency in mind, features like the captive single-screw cover and generous knockout panels for trunking allow for a rapid, tidy install.

Compliance Confidence

In an era of strict regulation, the KF-650 guarantees adherence to the highest standards. It is engineered to exceed Part L requirements

Secure Your Stock Today

The KF-650 Essence is available to order now, and it's backed by our five-year warranty from the date of installation. Whether you are looking to standardise your specification for upcoming projects or need a reliable solution for immediate installation, our sales team is ready to support you.

Download the complete KF-650 installation guide (PDF)

Contact Whisper Controls Sales Team to discuss pricing and complete system control packages today by calling 01993 640073.