We use the Pari LC nebs, and yes those can be boiled. After I wash and rinse them, I boil them for 10 minutes. I then set them out on a paper towel with another paper towel over the top to air dry.
DO NOT boil the tubing. After the neb is done, pull it off the tube and let the compressor run a few minutes to dry out any condensation that has collected.
Some masks can be boiled, other can't. We only used masks for a brief time so someone else might have better info. I added bleach to the water that I washed my mask in. Then after I had boiled and removed the nebs from the pot...I dipped the mask in the hot/sterilized water for a minute or two then removed.
Don't be afraid to ask questions...keep them coming!