Orchidarium Daily Humidity Profile

This chart shows the typical humidity profile for a 24-hour period. The misting system kicks in at 8:30am, causing the humidity to rise from 80% to 95%. This triggers the external fan, which draws some of the humid air out of the orchidarium, and pulls in fresh air, dropping the humidity a little. The humidity gradually decreases through the day, until it levels off at 85% (which is governed by the hygrometer, which is set to introduce new fresh air if the humidity rises above 85%).
At around 2am, with the central heating off, the house cools down, this leads to the humidity dropping further in the early morning, until right before the misters kick in again at 8:30am.

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