Venting into a COLD attic. Advice Please

So here is the deal. I have some heat issues in my cabinet at the moment and am being forced to change my exhaust. You will see by the pictures that my cabinet has 2 chambers. What am planning on doing is changing the exhaust from the back of the cabinet to the top. The upper chamber will flow straight up through the top of the Cab and the lower chamber will do the same however the ducting will run through the upper chamber and again out the top. I currently have one small 80 cfm fan for intake and the exact same for exhaust (hence the fricken heat issue) !! I plan on changing the intake to passive (out the side of the cabinet) and putting both small fans to exhaust. I plan on running a 6" duct out of both chambers, up through the ceiling into the attic. At the end of the ducting (in the attic) I will mount a 6" boster fan to each one.
Finally to my question....... If I am sending warm air into the attic in the winter (where I live it is DAMN cold, like -30C) will I have a condensation issue in the duct work? Will I have moisture running down the hoses back into the cabinet? Will I have ice form on the fans in the attic?
Anyone ever have this question? Even more important, does anyone have the answer?
Thanks in advance for any input/suggestions.

all depends on humidity. I vent into an attic and it gets cold here, but it's also very dry, so I never had an issue. I know that people in humid environments can't vent into attics unless the attic itself is vented because of moisture. Where I live they advise using humidifiers to prevent issues on the dry end.

It is pretty dry here although my house itself is quite humid. I do have 3 of those whirly bird things on my roof that vent the attic! I did some further research and found that it should be OK if i have the booster fans running parallel to the ceiling. THat way if there was a condensation issue, it would not run back down the hose. Thanks for the reply gobbly !
peace !

BTW, great work with your ladies my friend !!!!!!