Reply To: Suck or blow

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Daryl Dobbs

I fitted to my Newtonian a fan which blows air up the tube, the rationale behind this is to break up the boundary layer in front of the mirror, a while ago I wrote an article which is found in tutorials on cooling Newtonians which might help.

Gary Seronik has written a couple of very useful articles on cooling and condensation which might be helpful.