Cheap Inline Fans

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?

Get a cheap powersupply and a couple Coolmaster PC fans.

sanyard said:

Get a cheap powersupply and a couple Coolmaster PC fans.

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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.

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

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.

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.

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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.

http://www.homedepot.com/Building-Materials-Ceilings-Attics/h_d1/N-5yc1vZ1xr5Zargr/R-100014195/h_d2/ProductDisplay?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.

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

Going to take this motor:

http://www.homedepot.com/Building-Materials-Ceilings-Attics-Ventilation/h_d1/N-5yc1vZ1xr5Zas18/R-100062911/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053http://www.homedepot.com/Building-Materials-Ceilings-Attics/h_d1/N-5yc1vZ1xr5Zargr/R-100014195/h_d2/ProductDisplay?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.

How did this work out for you?

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.

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!

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.