Fuel-air premixing is the accepted technology for reducing NOx emissions from combustors and burners. In view of this complex burner-nozzle designs involving multiple swirlers have been designed and developed. I have developed a high-premixing fuel-air nozzle that involves micro-fabricated porous swirl panels with distributed fuel injection. The design and fabrication of the fuel injector has been completed, the injector assembly has been set up in a combustor test-rig, and a variety of tests have been undertaken. The tests have clearly established that compared to a traditional solid swirler with a premixing length the micro-fabricated swirl injector-assembly lowers the Lean Blowout Limit, enhances mixing and volumetric heat release, and for the same temperature levels as the solid swirler, reduces NOx levels.