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Bridgetown Botanicals Shop: Bridgetown Botanicals

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OfflineApJunkie
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weird ventilation question
    #8040860 - 02/18/08 11:19 PM (15 years, 11 months ago)

so say I have a 135cfm squirrel-cage fan with a 4" intake. Now say that I have a 250W HPS light with an aircooled reflector with a 3" hole for ducting.

Will this cause any problems? Any idea how many CFM I'll lose?


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InvisiblePoC
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Re: weird ventilation question [Re: ApJunkie]
    #8041230 - 02/19/08 12:39 AM (15 years, 11 months ago)

I don't know much about exhausts but I bet if you look online or at your local hydroponics shop there will be adapters for different sizes.  Then you would have no CFM loss :smile:

EDIT: I just searched online a little and if you type in 3" duct reducer into google you'll probably find something that'll be good for you, though 3"-4" doesn't seem to be a very common size.


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Edited by PoC (02/19/08 12:48 AM)


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OfflineApJunkie
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Re: weird ventilation question [Re: PoC]
    #8041359 - 02/19/08 01:18 AM (15 years, 11 months ago)

I know there's adapters, but there will be cfm loss when you use one.
You can't suck as much air through a 3" hole as a 4" hole... that's pretty much a fact (especially with my shitty fan :lol:).

I just want to make sure I won't be doing anything dumb like cutting my airflow in half, or burning out the fan motor etc...


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