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Cannabis

SHRED

(28,136 posts) Thu Nov 12, 2015, 01:07 AM Nov 2015

Venting a grow space

I just got an LEC light

.https://www.sunlightsupply.com/shop/bycategory/lec-lep-led/sun-system-lec-315-light-emitting-ceramic-fixture

I had to upgrade my exhaust fan a 4" Vortex 150 cfm to a 6" Hyper Fan 315 cfm. This light is a bit hotter than my old setup.

Question...What is the ratio of intake to exhaust? In other words, for max airflow, do I need to go bigger than 6" for a passive intake port?

3 replies

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Venting a grow space (Original Post) SHRED Nov 2015 OP

At least as much air should enter as can exit, if you want your blower to run at max efficiency jmowreader Nov 2015 #1

Thanks SHRED Nov 2015 #2

I found this just now SHRED Nov 2015 #3

jmowreader

(51,469 posts)

1. At least as much air should enter as can exit, if you want your blower to run at max efficiency

Reply to SHRED (Original post)

Thu Nov 12, 2015, 04:31 AM

Nov 2015

I did some snooping online...you'll need a 10-inch round vent or an 8-inch square vent to allow enough air in.

SHRED

(28,136 posts)

2. Thanks

Reply to jmowreader (Reply #1)

Thu Nov 12, 2015, 09:59 AM

Nov 2015

For this grow I may cut a 9 x 9 square hole and seal an HVAC filter over the opening.
I'm growing autoflowers so a little light during lights off I think is okay.I'll need to confirm that.
I have a hard-sided grow space.

SHRED

(28,136 posts)

3. I found this just now

Reply to jmowreader (Reply #1)

Thu Nov 12, 2015, 10:22 AM

Nov 2015

http://www.greenpassion.org/topic/16793-what-size-vent-fan-do-i-need-and-intake-area-size/

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