Stiefel's heater burners combine reliability with fuel efficiency. In premix configuration, natural gas or light oil is fully combusted. Additionally, the modulating control reduces output to match the heating demand and decreases standby losses by 30%. For a European district heating network, our burners achieved a cumulative 22% reduction in natural gas consumption across over 50 heater units, all while complying with urban low noise standards ( ≤75 dB ). The volume also makes the space available for retrofitting the heater systems more compact while aiding easy integration into the existing heater system.