If the Burner is designed with axial air flow & a
rotary shutter, then adding digital modulation & a
variable speed control drive ( inverter / V.F.D. ) will
ensure repeated accuracy of combustion & hence optimize
the use of energy.
Ratiotronic DDCC systems manage single & multi
fuel Burners so that they will consistently operate
below 3% O2 across all operating loads and at less than
2% at high fire.