New fresh air calculator free!

I made a php script to calculate fresh air with and without filter going to be adding more features to it let me know if you find any bugs enjoy!!

http://www.mmmlist.com/freshcalc.php

Does is take into account the wattage? or is it assumed to be air cooled lights as well.
I put in a 10X10X8 room, with a filter, and was given 480 CFM.
If I was running 4KW in that room, not air cooled, I think a 480CFM fan and filter would not cut it, unless I was living in Colorado.
I would also consider the length of ducting in and out of the room, the number of bends. Outside temperature.
This is a great idea though, keep it up!

right now its fresh air exchange only im adding more to it to account for heat and obstacles!