I have been given an old 4 door fridge. Stainless Steel lined and the doors are about 2 foot square. 2 up and 2 down. I won't be starting to assemble this until next summer when I travel back to where I grew up and where I am going to retire. I do spend sometime there in the summer. So I want to start this summer but where do I even start. What type of heat source, damper set ups, etc.