"NOx control technique" means a system, design modification, or use of equipment and technology to reduce NOx emissions to the ambient air from NOx-emitting devices or processes, including combustion modifications, low-NOx burners, overfire air systems, low excess air systems, flue gas recirculation, natural gas reburn, burners out of service, fuel switching, selective catalytic reduction, selective non-catalytic reduction, or other device or procedure approved pursuant to Env-A 1315.
N.H. Admin. Code § Env-A 1302.36
(See Revision Note at chapter heading for Env-A 1300) #9803, eff 10-31-10