My friend has a major dust problem in his house. How bad is it for his health?

Question

He has dust everywhere. Big clumps of it! Eurgh! How umhealthy is it? Where does it all come from?

Answer 1

It's bad if he suffers from asthma or dust related allergies. It builds up if you don't clean and vacuum regularly

Answer 2

since my nose counts dust in parts per million - it is very bad for me -

needs to clean his house

Answer 3

central heat and air can cause this.. tell him to check his filter and yes it breed mold and spores that can in some instances kill you .. but if nothing else its hard on sinus and allergies