The high efficiencies and low
particulate emissions claimed by
Hoval for its STU biomass boilers are
the result of thermally efficient
design, advanced controls and high
quality wood pellet fuel produced to
the EN+ standard.

Testing of the STU 195 wood
pellet boiler by TÃœV has confirmed
efficiencies to 92% with an average of
3mg/MJ for particulate emissions,
achieved through a combination of
inverter controlled fuel feed augers
and responsive induced air flow,
regulated by a robust, strategically
located lambda probe. Combustion
is optimised by a Flametronix PLC
based touchscreen control system.