COPD & Emphysema Support Group
COPD is a progressive disease characterized by airflow obstruction or limitation. Emphysema is characterized by loss of elasticity of the lung tissue, destruction of structures supporting the alveoli and of capillaries feeding the alveoli. Both have symptoms that include shortness of breath, among other respiratory troubles. If you are a COPD or Emphysema sufferer, join...

some do have a filter thingy in them....that needs replacing every so often. but a compressor is just a machine...should be good for a long time.
http://www.health-marketplace.com/info/nebulizer-systems-faq.htm
Don't forget to soak the pieces of your neb kit in a vinegar/water solution every few days to keep it sanitized. Soap and water is good for the rest of the time.
Hugs, Sue
they just told me to soak it in the vinegar...
nothing about throwing it away! yikes!