BOP lists these biomes as Deserts, and they will pant in these biomes
Badlands, Canyon, Canyon Ravine, Desert, Dunes, Lush Desert, Mesa, Outback, Savanna, Savanna Plateau, Scrubland, Steppe
Not having seen BoP, I can only go by what I see in the maid mod source; but I do seem to recall a line or two referring to the biome's base temperature, and the panting sound is when the temperature is above a certain amount -- so it's not by biome by name, particularly, but by the float value of the biome temperature.
I don't believe it would be easier to compare per biome name, as perhaps we might think it is done; I see far too many biome mods available to compare them all. A base temperature comparison is the simplest way to do it, so as long as a biome's temp is within a respectable range, the "panting" should work as expected -- although in my own work, I'm also considering adding support for more maid voices per temperature ranges, such as a "shivering" voice for the cold biomes, maybe a sigh of contentment in the "ideal" biome temperature range, -- and possibly other commentary on the time, weather, and working task....
That said, as far as the sounds are concerned, my work in the last few days have brought me back around to an old idea I had, of overhauling the maid sounds somewhat, and in fact making a separate mod for handling maid sound-events. I have an initial "mini-readme" of my thoughts so far in this regard, that I'm sharing from my DropBox account: MaidSoundsReadMe.txt