I grow in the Attic.
The only problems I get are heat Temps to high during summer months.
I have a clone area with a Mother plant there, and I have a sealed flowering
Area using and air cooled hood 400wt HPS, 4ftx4ftx5ft.
This time of year it begins to get cooler so you sould have no worries about temps if your ventilation is good.
I use 100mm intake and 100mm out take fan, an osculating fan, hygrometer mini, and i have a 20litre water tank with pump hose and spray gun.
The most important of all i think is proper ventilation in and out.
Hope this helps ya.

Chef.