OK folks, here's the plan...
I have enough lumber for a 30"x30"x84" smoke house, building it out of 1x8 pine barn boards, ship lap (was cheaper than tongue and groove), with a metal roof. Going to heat it with a 1500w 12.5amp double hot plate, and insulate it with roxul (mineral and steel fiber insulation, non-toxic, fire proof). And, I have an Auber Instruments multipurpose plug and play controler on its way, complete with temp probe. Also going to make it possible to mount my Smoke Daddy Big Kahuna for cold smoking.
Why am I insulating it? Cuz its cold here, and I don't want the electric elements running all the time - I can just imagine the power meter spinning at lightning speed :)
So, items I'm looking for feedback on, how to finish the interior (I was thinking sheet metal), and how to vent smoke - either through a metal chimney with a dampner or through vent holes drilled in the sides at the top, covered with bug screen, and air controlled by metal electrical covers.
Re: interior finish, is there a particular kind of metal I should be looking for? Like, food grade stainless or something? I'm going to avoid anything with a coating on it, but is regular sheet metal is going to do the trick or will it off-gas nasty stuff when it heats up? what are commercial smokers like my MES lined with?
Re: venting, anyone know where I can get a 4" stovepipe with a dampner and rain cap these days? Lol I like the idea of that better because I can put the vent on the roof which would do a better job of preventing creosote condensation during cold smoking than vent holes drilled at the top of the sides.
I'm probably fretting over nothing, I should just get in there and start dirtying up my garage, but I like to have all the details worked out beforehand. Yes, I'll take pics when the time comes!