R-13 sidewalls, R-30 in Ceiling Air lines plumbed with type L 3/4" copper. One air outlet in each wall and one in the ceiling. Lots of electric outlets, including 220V for my welder. Black iron pipe in the walls for future gas furnace. The green back hoe is another homebuilt project a CADigger. I'm sure you've seen the plans in the back of a magazine.