A few years ago, I bought a air blower that has a Hepa filter. Like this one on this picture (taken from Amazon):


I chose this kind especially because of the filter, to make sure that no dust will be on camera, the lens or the negative (when working in the darkroom).

What I also like with this kind of blower is that it's safe for the environment (and for the health), and it uses the ambient air so no "cold spots".

Have a nice day!!!
Jeff