ventilation question

So with a fresh air in an exhaust out set up during the winter months how are you guys keeping your fresh air coming in the room at a manageable temp to work with when its say 10 degress outside? Any an all advice is much appreciated! Thanks in advance.

Also Im already aware of not venting my air cooled reflector an removing the glass I was looking for something more efficient an reliable an consistant .

uncle fester 660 said:

Also Im already aware of not venting my air cooled reflector an removing the glass I was looking for something more efficient an reliable an consistant .

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When I was growing inside during the winter, I had the exhaust going to my bathroom and the intake was just the air around. Its most likely going to be higher CO2 (because of me) than outside air and the temperature is consistent. I was on the coast and it got down to 0ºC and I never opened a window. Open a window a bit if you want, but I wouldnt worry about "fresh" air needing to be in the grow.

When you say fresh air "because of me" what are you getting at . Also how could regular house air be better then outside air c02 wise? Just wondering.I guess long as its fresh to the grow room its good? And thanks for your input its much appreciated!

uncle fester 660 said:

When you say fresh air "because of me" what are you getting at . Also how could regular house air be better then outside air c02 wise? Just wondering.I guess long as its fresh to the grow room its good? And thanks for your input its much appreciated!

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Air from outside generally has an ambient Co2 level of between 300-500ppm depending upon where you live.

Inside a normal house Co2 levels are generally between 400-600ppm depending upon how many people live within the house.


In my grow I intake air passively from outside via ducting. During winter it gets cold in the UK. At this time I block off 2 out of 3 of my external intakes and allow the rest of the air to come in under the closet door.

This along with running a dehumidifier anyway keeps my temps up.

The best solution is to have 2 sources for your intake.

One which is external for summer running if you don't have home AC.

And one which intakes from within the house during winter.

That way its just a matter of having to switch your ducting from one intake to the other.




J

What if you have no heat to tap into (unattached garage) ? Any ideas or suggestions for the intake.
Thanks

wwrockyou said:

What if you have no heat to tap into (unattached garage) ? Any ideas or suggestions for the intake.
Thanks

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Draw your intake air in from inside the garage.

Exhaust out of the garage.

Unfortunately in this situation heaters would be the only other alternative.

Depending upon the size of the grow room/tent you may be able to get away with greenhouse tubular heaters that run around 80w each rather than burning a 2kw heater.



J

Right on makes perfect sense an practical as well thanks for the advice bro

uncle fester 660 said:

Right on makes perfect sense an practical as well thanks for the advice bro

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No worries.



Just a word of warning though if you are using an air cooled hood with its own independant fan and intake exhaust, sealed style as in no grow room air passes through it, DO NOT USE AN EXTERNAL INTAKE for it as condensation will form on ducting and inside your hood.

Past experience. Lol.



J

Could explain in depth a little more ....... are you saying you should leave one side of the air cooled reflector open so it uses the grow room air to run thru the hood an bulbs?

uncle fester 660 said:

Could explain in depth a little more ....... are you saying you should leave one side of the air cooled reflector open so it uses the grow room air to run thru the hood an bulbs?

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No.

What I'm saying is that if you use an air cooled hood, the most effective way of using one is to supply your air cooled hood with its own intake and exhaust using a seperate fan from the one used to scrub and exchange the air.
By in taking air from outside the grow room for the light and exhausting the light out of the grow room, no grow room air passes through the lighting system.

If you happen to choose this way of fitting your air cooled hood then I would advise against using an intake directly from outside. Simply as condensation can occur.




J