My sister works in a tall building. I realize there are a lot of chemicals involved in a fire, but I am primarily concerned with the smoke inhalation. Due to $$, I am looking for a paper mask. Recommeded here is the N95.

But, which N95? 3M makes a number of these (8000,8210,8212, 8214,8511,8514,9511). Wow, how am I supposed to know?

The search didn't provide much concrete direction. 3M's website isn't all that helpful, either, as there isn't much comparison between one and the next. From what I gather, I believe I need an 'N', not an 'R' or a 'P'.

Please help,
Xavier (Phoenix, AZ)