6 inch hood on a 4 inch fan

djibra said:

hi fam,

so did anyone used/cooled a 6 inch reflector with a 4 inch fan? i dont find many quality hoods in 4 inch so im looking at bigger ones..but i have a new 4inch fan and i dont want do make extra investments so can you help me out on this one

hope i was clear with my english

cheers

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wvkindbud38 said:

I'd probably go with a 6in fan unless you already got a 4in.

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djibra said:

hi fam,

so did anyone used/cooled a 6 inch reflector with a 4 inch fan? i dont find many quality hoods in 4 inch so im looking at bigger ones..but i have a new 4inch fan and i dont want do make extra investments so can you help me out on this one

hope i was clear with my english

cheers

Click to expand...

its.always.420 said:

He already has a brand new 4" fan. Stated in OP.


I've done it (with 1000hps) and it worked just fine, although only up to 70 degrees ambient temps. Had to switch out to a 6" for summer. I would only use one 4-6" adapter and pull air through the hood, with the intake side being 6" and the outflow 4".

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f-e said:

It's quite possible that an uncomplicated job such as this will see more airflow with a 4" than a more complex 6" install would.

There are many variables. Just one is the fact that most fan sizes are available in high and low power versions. Often, a high powered 4, uses the motor of a low powered 6. And will in fact shift more air once the going gets tough.

Perhaps a 4" fan outside the tent, can couple directly to a 6" duct, that does a line of sight dash through the tent wall, the light, and back out again into the same room. Leaving a second fan on carbon filter duties. So the extract fan is concerned with smell and humidity, while the lighting fan is a separate circuit.

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wvkindbud38 said:

I'm gonna use a 4in vortex to cool one 1000watter, with a 6in air cooled hood. I hooked it up and it'll work......yes a 6in would be better fitting and cool multiple hoods. But I got this 4in vortex almost brand new for less than 25$ including shipping. If it wasn't for such a good deal I'd probably have bought a 6in fan for 6in reflector. I use a 8in Hydrofarm (big green( to circulate airflow in my growing area. I'd probably go with a 6in fan unless you already got a 4in.

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wvkindbud38 said:

I mint in general I wouldn't buy a 4in to go on 6in reflector. I used to use a 6in Vortex on 4 separate hoods....1000, 600, 430, 400 and that fan cooled 4 different styles of sunlight supply hoods, I kept plants pretty close to those hoods. Like I said Im using a 4in fan on 6in reflector....yes It works but if I was gonna buy new I'd go with 6in fan......in general.....yea I get he has a new 4in. Maybe that's a little more understanding lol

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