Yeah those pads work pretty well. Propagation pad? Heat mat? They don't get very warm, I think they are mostly designed to sit under some propagation trays, or grow cups.

Insulation IMO is probably the best bet. The more the better, but that creates a higher need for ventilation. For example, I have a nice triple wide Super Good Cents home, and we would suffocate if we did not run a whole-house fan.
Opie Yutts Reviewed by Opie Yutts on . First grow log This is my first indoor grow, its in an attic and its pretty much thrown together. i ran out of money and rescources so this is pretty much how its gonna be for the next while. Theres no fan and the ventilation is coming from the many gaps in the plastic and that squashed flexihose u see in the picture anyway only time will tell how it goes. the seeds are sensi's indoor mix which is a mix of all their indoor strains (Shiva shanti, hindu kush, afghani, maple leaf indica, first lady, four way, Rating: 5