Hello I have the harbor freight greenhouse build. And I live in So Cal the temp outside is around 80F with humidity around 50%. In my greenhouse it gets up to over 100F with a humidity of around 20%. How can I fix this issue I will be adding some shade cloth on top of the greenhouse as well as an exhaust fan with a thermostat will that do me any good? Here is the exhaust fan I’m looking at as well as my greenhouse for reference.
by Ag_2402
9 Comments
Shade cloth and an exhaust fan will definitely help. Putting a box fan by the entrance door to intake air also has been pretty helpful for me.
How high are you looking to get humidity? I find mine skyrockets when I water, and stays there a decent amount of time. FWIW, my ambient humidity is usually only around 10%.
It’s not for everyone, but I’ve had great success out of an evaporative cooler, shade cloth, and some temporary white paint on the most sunward facing windows
Evaporative cooler and you can also add misters that go on a schedule of X minutes on X minutes off.
Outside sounds perfect. Isn’t that why people live in So Cal?
Swamp cooler does both aka evaporative cooler. Larger greenhouses have wet walls with fans, same thing.
Get some misters.
Relocate to Missouri. That’d do it for sure.
Seriously, though, have you considered a few 5 gallon buckets with aquarium air stones & an air pump?
[see here](https://5.imimg.com/data5/IS/IA/KI/SELLER-3875179/aquarium-air-stone-500×500.jpg)
Are you focusing on ornamentals? If not, humidity basically doesn’t matter, but temperature does
Lowering temp raises the humidity. I have had a lengthy discussion with people that fail the concept that humidity is relative