Ideal combustion requires properly balancing gas and air. Elan controls can modulate the gas flow through industry standard gas valves AND adjust air flow to achieve perfect combustion. Elan software tools help OEMs to create their own unique gas/air tables for their burners. For OEMs who have upgraded to modulating gas valves but need to connect legacy control systems (4-20mA) to the new modulating gas valves (0-10v, 0-20v, or PWM), consider Elan signal converters. They make integration easy. Contact Elan for a modulating gas valve control inspired by these examples!