Cheap Inline Fans

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LiquidLumen

Active Member

• Nov 3, 2009

• #1

So I was at Home Depot the other day, and happened to stumble across a 12-inch diameter inline garage ventilation fan, rated at 1540 CFM for only 80 bucks, which is a freaking great deal considering an average price for 500-600 CFM CAN fan is a couple hundred dollars. The only problem is I need to converge the 12" diameter to a 6" cool tube- but can't seem to find a reducer that starts at 12" anywhere. Anyone have any ideas, or any other suggestions on cheaper fan ideas?

 

sanyard

Well-Known Member

• Nov 3, 2009

• #2

Get a cheap powersupply and a couple Coolmaster PC fans.

 

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LiquidLumen

Active Member

• Nov 3, 2009

• #3

sanyard said:

Get a cheap powersupply and a couple Coolmaster PC fans.

Click to expand...

PC fans are not efficient for cooling an HPS bulb because they're designed to be used in a compact/small space (computer). IF space is not an issue for your fan, you are wasting money on having a design that optimizes space restrictions. I need at least 500CFM, there's no way a computer fan is putting out that kind of power for under 100 bucks.

 

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SticherVA

Member

• Nov 3, 2009

• #4

This is the one I ordered that will be here on thursday, they also have carbon filters cheap.

http://htgsupply.com/viewproduct.asp?productID=52583

 

Tookie123

Active Member

• Nov 3, 2009

• #5

Don't buy the 12". I buy the 6" ones from home depot. It's a complete waste of cfms wen u reduce that much!!!! Go get a physics book by friend to have some studying to do! The 6" are rated at 300cfm I believe and I stick 2 on each of my 1000w. Keeps em icy cold.

 

L

LiquidLumen

Active Member

• Nov 3, 2009

• #6

Tookie123 said:

Don't buy the 12". I buy the 6" ones from home depot. It's a complete waste of cfms wen u reduce that much!!!! Go get a physics book by friend to have some studying to do! The 6" are rated at 300cfm I believe and I stick 2 on each of my 1000w. Keeps em icy cold.

Click to expand...

First of all, what "physics" are you referring to? It's simple- you decrease the diameter of your flow, and the velocity increases. Yes, you will lose a small amount of flow due to resistance, but I guarantee you it will still be at least 1,000 CFM...give me a formula to back up you're claim, because I don't think you know what you're talking about.

2nd, home depot doesn't have 6" fans that are anywhere near that power- once again, prove me wrong if you can.

 

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LiquidLumen

Active Member

• Nov 3, 2009

• #7

http://www.homedepot.com/Building-M...splay?langId=-1&storeId=10051&catalogId=10053


Here's my link, turns out I was wrong- it's actually cheaper than I thought @ $60 bucks pre-tax for 1540 CFM- you can't aruge this isn't an insane amount of flow for 60 bucks...the only challenge is getting that to fit you're hood/cool tube diameter.

 

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LiquidLumen

Active Member

• Nov 3, 2009

• #8

Ok, if I don't find the reducer, I've got a solution.

Going to take this motor:

http://www.homedepot.com/Building-M...splay?langId=-1&storeId=10051&catalogId=10053http://www.homedepot.com/Building-M...splay?langId=-1&storeId=10051&catalogId=10053

And attach a smaller fan blade and fitting to the motor, make my own 1/7 HP fan with a 6" diameter.

 

1freezy

Well-Known Member

• Feb 20, 2010

• #9

How did this work out for you?

 

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Potato42

Member

• Feb 20, 2010

• #10

Yes usually these fans are expensive, but you can still find some good deals like this one http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280278994464&ssPageName=STRK:MEWAX:IT

This compares with any of the high end fans and is ready to go without modification. I don't think it's worth it to end up spending nearly as much for something you have to modify to get similar performance.

 

UNICRONLIVES

Well-Known Member

• Feb 20, 2010

• #11

go to a metal shop and get a 2ft x 4ft sheet of alum. 26-28 gauge tin snip it into an ice cream cone shape and dill it, rivet it, and silicone it!! prob solved and you'll have 30 xtra bucks in it total!

 

trophy1

Well-Known Member

• Feb 20, 2010

• #12

I have a couple of the 6 inch duct fans from home depot cooling a 1000w and a 400w, the room never gets over 80 degrees. They are also pretty quiet and I paid like $25 a piece for them.