This fall I got my greenhouse built. It is intended to be a three season space not year round. I don't want to try heating it on the -15F nights, too much work.
That said on a sunny day I get a 60-70 degree gain. So this time of year it is my smoking space. Today it was 14 outside and 80 in the green house. The dimensions are 10 foot by 20 foot and the plastic is 3.5 mm thick double wall. I still need to do a little work on the door as it lets a fair draft in. As of right now I have tables/benches for 49 1020 trays.
That said on a sunny day I get a 60-70 degree gain. So this time of year it is my smoking space. Today it was 14 outside and 80 in the green house. The dimensions are 10 foot by 20 foot and the plastic is 3.5 mm thick double wall. I still need to do a little work on the door as it lets a fair draft in. As of right now I have tables/benches for 49 1020 trays.