Fans should be pointin in or out in a canopy?

[tony]

I am trying to install two fans in my canopy and was wondering what is the best way to do this. Should I point one fan blowing in and the other out. Or should I have both blowing air in? Which is the best at cooling or keeping the canopy cool? Any info is appreciated. Thanks in advance

[alf3482]

Tony,
On my two 400w MH canopy i have 1 fan drawing air in and 1 fan push heat out.HTH

[smpolyp]

I like to point them in when I can. It helps keep the salt creep down and make the fans last longer. Not to mention the noise when they bog down with salt and dust.