The new LST (low surface temperature) version of Dunham-Bush's popular Series AM fan convector ensures that surface temperatures do not exceed 43°C - satisfying the growing requirement for fan convector casings and grille temperatures to be 'safe'.
While LST radiators have been available for many years, achieving low surface temperatures for fan convectors has been a greater engineering challenge, due to the higher air velocities during operation and elevated internal temperatures in stand-by mode.

Dunham-Bush has tackled this issue by modifying the output from the heating coil and introducing a 4-port diverting valve to isolate the coil in stand-by mode. This combination ensures that the casing of the convector does not exceed a surface temperature of 43°C, providing total compliance with Health Guidance Note ''Safe' hot water and surface temperatures', NHS Estates1998.

The LST Series AM floor-mounted fan convector is available in all standard sizes, offering nominal outputs from 2kW to 9kW. Installation is as straightforward as with standard models and the actuator is automatically controlled with no need for additional control inputs.

LPHW connections use standard 22mm copper pipe and low temperature cut outs are pre-wired for easy plug-in installation. All standard fitted and remote thermostats, switches and relays are available for any common control arrangements, including master/slave operation for groups of 2 to 6 fan convectors.

The LST Series BM chassis fan convector heater is also available with the same features as the LST Series AM. These units are typically used where intake and discharge grilles may be accessible by individuals requiring protection from elevated temperatures.