Heat and humidity concerns

Triggertrevor

Active Member
Hi all just wondering if anyone can advise me on a potential problem I might be running into.

Light on temps 26c / 78.8f
Lights on humidity 60%

Lights off temps 21c / 69.8f
Lights off humidity 75% - 85%

1x600w hps
Growing in nft 2x205gti trays holding 20ltrs each.

I have 2 plants in with a lot of foliage so I think this maybe effecting the humidity a little along with the water in the trays.

The problem I have is controlling my humidity at lights off.
I have a dehumidifier installed at the moment which is keeping my humidity under control at around 45-50% when lights are off but this is pushing my lights out temps up to around 24c / 75.2f due to the heat the dehumidifier is putting out which means I only have a 2c drop in the rooms temp between lights off/on.

Any advise on this would be great

Cheers :-?
Do I add an heater to the room to up the lights on temps a few degrees so the difference between lights on and lights off are more than a few degrees.?
 

smokey mcsmokester

Well-Known Member
Your temps are fine right where they are...just keep using the dehumidifier during lights off....As long as your temp dont go over 90 f i wouldnt stress.... a temp drop at night of only 2 degrees is A-OK....
 

Corso312

Well-Known Member
sounds like you are all dialed in if your humidity is 45-50 % when the lights are off with your dehumidifier, a two degree temp difference is fine...you do not need a large temp swing with lights on/off..in fact you do not want large swings
 

Triggertrevor

Active Member
Thanks for the prompt replays you 2.

Just to add
Intake fan 5"
Exhaust 6"
Fan controller smscom mechanical
Oscillating fans 1x12" 1x16"

Cheers
 

Triggertrevor

Active Member
Yet another update........

After adding the dehumidifier lights off temps has risen to around 24c but Its slightly cooler during the night at the moment so my lights on temps are at it's lowest is 24c the same as lights off.....?

My question is because there's not temp change between lights on and off would this in time cause problems.

My other test that I have done is the run the dehumidifier 24/7. Lights on temps 28.2c lights off temps 24c ish.

Advise is greatly welcome.

Cheers
 
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