A porous burner in which a premixed flame is stabilized within the solid matrix is a promising technology for various applications due to its low emissions. In this article, experimental measurements of flame stabilization, operating range, and emissions are reported for several porous burners. The burner consisted of two sections of reticulated porous ceramic: a section of 23.6 pores per centimeter (ppcm) followed by a section of 3.9 ppcm. Two different porous media materials, yttria-stabilized zirconia/alumina composite (YZA) and zirconia-toughened mullite (ZTM), were used in two separate, but identical, burners. Results reveal that the interface between the two sections of porous ceramic stabilized the flame effectively over a range of conditions in the YZA burner. In the ZTM burner, however, theflamepropagated through the interface and into the upstream section. A third burner was constructed of YZA in which the length of the upstream section was reduced. The operating range for this burner was determined for a range of equivalence ratios. Firing rates ranged from 675 to 3951 kW/m(2) . Unburned hydrocarbons were elevated at low firing rates but were low at higher firing rates. Carbon monoxide (CO) emissions were less than 15 ppm. Nitric oxide (NOx) emissions were below 10 ppm for all cases.