However I have added an extra panel so it is 7' X 150" x 6'-1 in the center. I am heating it with a 55 gal blue barrel of water and 2 200W fish tank heaters. I bought a double fan that is able to run the fans in opposite directions. This will circulate the air well and ventilate the space. The fan also has a thermostat so it will automatically turn on and off. This is my first attempt at having a greenhouse, but I expect it to be a good one.
Maybe if I can figure out how to use concrete mesh instead of cattle pen panels.....
