air from furnace?

i have a small flowering room about 2'x7' and i have a air vent in there. I was wondering if the air from the furnace would be considered "fresh" air. The closet is in my basement and i dont have any other source of fresh air.
whatcha all think? thnx much,happy smokin!

It really wont be considered fresh air because the furnace is in the basement Im guessing. And you might have an issue with your furnace that might cause an issue with ur grow. Its called cyanide collection by the burners. + it might get ur room to hot!!!!! I do HVAC for a living. If there is white powder by the burners in the furnace you have a big issue with your unit and It could even get you sick but as far as using it as a fresh air I wouldnt call it fresh it comes from a closed in source....PEACE!!

ok thnx as far as it getting too hot its cold here right now so i actually realy need the heat or it will be around 50-60. any other thoughts?