Originally Posted by Bluenote
Nice grow , beautiful results and plants. A word about the above though , since you're medical the dead giveaway factor
perhaps is a moot point , the factor of blowing hot air into the attic during the cold part of the year being a prime environment for mold in many cases however is a very serious thing and apotential health risk, Make sure to check that attic for signs of mold on a frequent basis , if it gets started only rehab of that spot will get rid of it and you do not want it spreading.
You might possibly be ok with sufficient ventilation , however I've seen this happen to quite a number of folks and you might want to keep an eye on it.