Active LST Fan Convectors
Belgravia Fan Convectors, including the innovative Active LST Fan Convectors, are a popular heating solution for public spaces due to their efficiency and easy-to-clean surfaces. However, it is important to note that elderly, disabled, or vulnerable individuals may face additional risks when near Fan Convector units.
People with limited mobility or balance can potentially fall and become trapped against the surface of the Fan Convector, leading to injuries. Individuals with sensory issues or nerve damage may not realise the harm being caused to their skin from prolonged contact with the surface.
To ensure greater safety and allow a wider range of spaces to benefit from fan convection heat, we have developed Active LST Fan Convector Control, which can be used with all sizes of our Belgravia Style A range.
A Step Change in Fan Convector Technology
SPC’s Active LST Fan Convector Control is different from other fan-assisted low surface temperature Fan Convectors as it incorporates temperature-limiting technology. The unit contains sensors that monitor the temperature of the casing at the outlet grille and top panel, which are the hottest points.
This temperature data is then used by an independent valve to automatically adjust the flow of hot water. When the valve closes, it reduces the flow rate of hot water, which ultimately decreases or maintains the casing surface temperature.
We have extensively tested the Active LST Control to ensure it meets our high standards. The chart illustrates the surface temperatures measured over time for an SPC Fan Convector equipped with Active LST Control.
NHS Compliant at 43 Degrees
Active LST Control has been designed with temperature limits in line with the official NHS Guidelines. As per these guidelines, the maximum temperature is set to 43 degrees. This ensures that our solution is safe, compliant and industry-leading, providing consultants, installers and contractors with complete confidence in specifying and installing it.
To further enhance safety, we offer Active Control LST Fan Convectors with rounded ends that protect users from impact injury.
Easy to Install
The temperature sensors and automated valve are all pre-installed in our Active Control LST units. This means there is no additional pipework or wiring needed to install them. There are no additional order requirements or time required on site.
- Meets NHS Guidelines by limiting casing to 43˚.
- Suitable for Hospitals, Care Homes or around vulnerable people.
- No additional pipework or wiring.
- Surface temperature and heating capacity are controlled independently.
- Can be implemented on all sizes of our Belgravia Style A range.
- Available with rounded ends for enhanced safety.
- UK Manufacture for fast lead times and support.
Frequently Asked Questions
Active LST is not universally mandated by law, but it is strongly recommended or required by specific guidance documents for certain building types. NHS guidelines for healthcare premises state that accessible heating surfaces should not exceed 43°C. The Department for Education’s guidance for school buildings also recommends LST for areas accessible to children, particularly in SEN schools and early years settings. Many local authorities and trusts include LST as a contractual requirement in their specifications. If in doubt, check your project’s specific guidance or consult the commissioning authority.
Active LST does not reduce the maximum heat output; it controls surface temperature independently from heating capacity. The Fan Convector can still deliver its full rated output to the room. However, when the casing approaches 43°C, the valve modulates the water flow to keep the surface safe, which may temporarily reduce output if the system is running at very high water temperatures. In a properly sized system operating at normal design temperatures, this rarely occurs. If the system is frequently limiting surface temperature, it may indicate the water temperature is higher than necessary, or the unit is undersized for the heat loss.
Yes, Active LST can be supplied as a retrofit kit for existing SPC Belgravia Fan Convectors. The kit consists of a valve, actuator, and thermal switch, and is installed by connecting the actuator to the Fan Convector’s customer connection box (CCB) and screwing the valve into the pipework at the heat exchanger connection. The retrofit is only compatible with SPC Belgravia Classic and Supreme units (Style A configuration) that have the appropriate connection points. Contact SPC’s technical team to confirm compatibility with your existing units before ordering.
Active LST is available on the Belgravia Classic and Supreme models, both in Style A configuration. It is not available on the Tilevector range. The Supreme with Active LST is the most common specification for schools, SEN facilities, and healthcare environments, as it combines the rounded-edge casing with surface temperature control for maximum safety.
If the sensor fails, the valve defaults to a safe position (closed), which prevents the surface temperature from rising. The Fan Convector will still operate, but with reduced output. If the valve actuator fails, the valve will remain in its last position. Regular maintenance and testing should identify any faults before they affect building occupants. The system is designed to fail safe, prioritising occupant protection over heating performance.
