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Old 07-08-2019, 01:18 AM #221
redlaser
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A possible option for cooling would be incorporating an evaporative cooler into the incoming air.
I have one that covers slightly more than 3/4 the width of the end of the greenhouse. It’s good for 10-15 degrees of a decrease in temps.

There is a guy on IG who uses Home Depot/lowes wall mount evap coolers on a 2,400-3,000 sq ft greenhouse. He uses four that are 3’x4’ in size, one would easily do your greenhouse. Jayplantspeaker is his IG name.

Thought it was a little on the hoopty side at first, but it’s really all that is needed.

At least you have a few weeks to get your night time humidity issues in check. A combination of heating and burping or one or the other will get it under control.
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Old 07-08-2019, 03:42 AM #222
Zeez
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The ambient humidity is too high for evaporative cooling.

The easiest fix looks to be having ducts on the fans taking the warmest air from the ceiling out.

Edit;

Heating and burping? So you heat the air to soak up the humidity and then vent it out?

Here's the beginning of the first duct prototype.
It looks kind of weird, but I can compare the temperature recordings in a few days to see how well it works.


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