A fridge produces as much heat as cold. Well u can't produce cold really. U draw the heat from the medium (air in this case) ans sweat off that heat (in your case into the same air) so its not doable like this.

Outhouse sheds are never a good idea really as sucurity becomes a serious issue due to possible light leaks, sound and the traffic in and out with water and materials.

If you can make sure all of the above is not a problem you still have to worry about kids or what have you snooping around.

In your case you need a way to get an even temperature in there that stays between prox 20-30 degrees C (68-86F).
The shed will have to be insulated and totally light proof. Insulated both because of temperature and sound as you will have fans running as well. If it is lightproof you will have to activelly ventillate the area to always keep fresh air inside. You dont have a similar area in your home you can box in to become a growbox for your needs?
I normally always advice against setting up in outhouses. But you know your surroundings better than me.

Puffzter
Puffzter Reviewed by Puffzter on . need help with my first grow room Hey guys, I'm gonna be building my first real grow box soon and Ive decide I wanna set it up in a shed in my back yard for various reasons, the problem with this location is that during the summer the temp reaches over 90F and during the winter will drop to around 10F. I was thinking that the best solution would be to put insulation around the outside of the grow box (as it will only be about 3x2x6) which should keep the heat from the lamps in during the winter, and maybe rig a mini fridge up Rating: 5