Environmental Controls
In my previous greenhouse I had an ideal environment. Because the building was built to be a greenhouse it had water & electricity installed as well as an oil heater which was in a separate room. As long as the window in the room with the heater was left open a crack there were never any exhaust gases from the heater in the greenhouse. I had a centrifugal humidifier with a humidistat. I kept the plants that loved the highest humidity closest to the unit.
Night heat during the winter was set at 55F; 99% of my plants at that time were cool/intermediate. For air movement I had a ceiling fan that operated 24/7 and a 14" round, oscillating table fan also going 24/7. Because the humidistat was fairly close to the humidifier I set it at 80% so that at the nether regions of the gh it was 60-70%. There was a door on one side and a large openable window on the other.
The greenhouse was 12X16 and faced due South. The North side was solid because there was all trees there and we get a lot of wind from that direction. That is also the side where the extra rooms were built. One facing into the gh and one facing into the yard. The S facing wall was slanted to take best advantage of the sun and I could hang lots of plants there. That wall was a double paned hard poly. Lower walls were glass, either double paned or 1/4" (all glass was trash picked at one point or another).
My current greenhouse is somewhat less than ideal. It's larger, 14x18. It was built as a 3 seasons room. It has windows all around and faces the right direction for good light. However, it has a solid, flat roof and no water inside it. But, unlike my other gh it is attached to the house. So I can bring water from inside or use an outside faucet when it's not too cold.
For humidity I have water on the floor (which is concrete instead of dirt). I do need to get some drainage. For air circulation I have a ceiling fan and 2 7" round fans going 24/7. Heat is provided by an electric heater. One thing I can do here that I really couldn't in the other gh is zone for heat. I do have a group of warm growers now. They stay in the middle area of the gh closest to the heater. Closest to the windows it's 5-10F cooler depending on the exterior temperature. So all the cool/intermediate growers are there.
Once I get water installed it will be much better. This winter is an improvement over last winter because when I moved in I didn't have time to take up the carpet, YUCK :x since it was October. It became mold central. But now there's no more carpet and the floor is painted with microbial resistant paint.
Plants go outside in the summer.
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