its me again!! fruiting chamber construction

[theycallmejake]

im in the middle of my first grow. everything going smoooooootthhhh. initally had a hard time getting the incubator temps just right. the cold ass attic is my lab. pretty soon itll be 20 degrees there. there are areas of pretty thick loose insulation. one of my ideas is to insulate the outside of the fc and run a heat bomb or two in it,cutting polyfilled holes through the insulation and an air pump. the only light will be entering through the plexiglass top, which is the direction i want the cubies to point. there will be perlite involved in this specific chamber. heating an entire attic is out of the question. im kinda thinking a tit will be a lot more efficient at keeping a constant temp. any ideas?? another question i have is..... say i hook up a fish tank air pump in the fc, are poly filled holes even needed for fae? or would the air pump be enough. they would also be fanned at least twice a day, due to my schedule. thanks guys! and gals!