UltraCat Catalyst Filters provide up to 95-percent NOx removal at the operating temperatures of most industrial boilers. Dioxins are also destroyed by the catalyst at 97- to 99-percent efficiency. For carbon monoxide (CO), a successful strategy for meeting the Boiler MACT is to tune boiler combustion to lower the CO output. While this can increase NOx production, the additional NOx is easily removed by the UltraCat filters. Often NOx requirements are already in place due to other Federal and State air regulations. Along with high NOx and dioxin removal, UltraCat filters capture particulate to exceptionally low levels.