Winter indoor grow box possible?
Please allow me to pick your brains.
I live in Japan where central heat and air is practically non-existent. Summers are hot and humid and winters are dry and cold (although temps never dip into the negatives in our area) During the winters, we generally run a gas or kerosene powered heater in the room that we are occupying and set a timer for it to turn off before bed and turn on again before we wake up. A consistently warm air temperature is pretty much impossible unless you're willing to pony up for electricity and/or gas. (might sound harsh when you're used to central heat/air--I was too--but you get used to it)
Anyway, given the circumstances, I am wondering if building an indoor self-enclosed grow box with additional bottom heating pad be feasible? This would be placed in front of a window that gets sun all day long (no joke, the front of our house faces southwest). I figure as long as the inside of the box is warm enough, we should be able to continue doing some growing throughout winter.