- Generally, I won't want my greenhouse to be more than 70 percent humidity.
- If it is too humid, a fan is best for exchanging the air.
- If a fan is not enough, or if I find it is raining endlessly, I should get a dehumidifier.
- If it's raining outside, humidity outside is 100 percent, so it won't do me any good to use the fan to exchange inside air for outside air.
- There are charts that will tell me relative humidity if I know the temperature and humidity. Update: I can only find charts where you know the temperature and the difference between the wet bulb and dry bulb temp. I don't think I'll be using a chart because I don't have such measurements.
- Regardless of temperature, the humidity will be within 10 degrees of the relative humidity.
- Only meteorologists are concerned with relative humidity. I will be just fine knowing the absolute humidity.
- I just need to get a feel for what my greenhouse feels like when the humidity is too high. Not only will I feel it, but I'll be able to see a good deal of condensation, not only on the glazing, but all surfaces.
It's raining right now, and it has been on and off since last night. Temperatures are warm--48 this morning and in the 50s today. One hundred percent humidity!