good point, do you think if i divided the attic in a corner so that it was enclosed, would that help? im short on $$ and cant really afford a carbon scrubber to filter the air
Yea, that will help a lot. Just make sure that you can control the temp to some degree. If there is any way you can filter the intake air that would be good.
You don't always need a carbon filter with attic grows in the winter unless you're doing a lot of plants. The cool air this time of year keeps the smell down. It's always better to have one though.
At one point, I had an attic grow and I positioned my box to exhaust about 2ft away from the ridgecap vent so it never built up, and went straight out of the vent. This isn't the best thing if you live in a neighborhood, but if you have a little space between your and your neighbors, it works pretty well.