Thanks so much for your response.I have a thermometer in there that tells me the temp.and humidity level. I’m assuming I’m reading the RH,but not sure. I do heat the greenhouse,in the winter as I do grow microgreens in there. In the wi tee though if I heat the greenhouse to 75 the humidity does not go,down much,this is where I get frustrated and confused. Is there something I’m doing wrong. I have now put a dehumidifier in there hoping that will help my problem. It’s also difficult to keep the humidity down when it’s raining outside.