/diy/ - Do It Yourself

[Anonymous No.742186]

question for you all, im trying to build a workshop air cleaner and im i little stumped, saw a video on youtube with a speaker box design and decided it would be shit simple to do. i justneed to go buy a fan at the home depot, no luck whatsoever for my willingness to shell out cash.

would i be able to use pic related ish to add up to a resonable amount, i have access to about 30 desktop fans, do two 30 cfm fans equal a 60 cfm? or less also tips on how to wire it to a 120v power source would be appreciated as ive never done anything electric

[Anonymous No.742189]

>>742186

They might not have enough pull and wear out the bearings/motor depending on what their static pressure is rated at. But your thinking of adding the cfm together is generally correct in most cases.

[Anonymous No.742191]

You would want a centrifugal fan for this application
if you could find an old heater and pull the fan out of it, you should be golden
This might be a little tough to find though

[Anonymous No.742193]

>>742191
any tips on finding an old heater?
also what would the diffrence be?

[Anonymous No.742194]

you would need to lay them out in a grid
also, home depot will have them in the bathroom or kitchen section for range hoods and extraction fans.

[Anonymous No.743372]

>>742186
Attic vent fan. Axial flow. About 500 to 1000 CFM for around $75. Already runs on 120 Vac.

[Anonymous No.743379]

You need both flow and pressure. If your fan moves enough air in free delivery it may still not produce enough pressure differential to pull or push air through a cleaner.

[Anonymous No.743404]

>>742186
This may be better for you.

[Anonymous No.743463]

>>743404
Where do you even find the filters for this?
Every place I've tried just looks at me weird and asks if I mean vacuum filters.

[Anonymous No.743500]

Don't create a wire nest.

[Anonymous No.743518]

>>743463
heater filters
Are you sure you are qualified to come to this board

[Anonymous No.743529]

>>743463
... It's a furnace filter what the fuck.

[Anonymous No.743583]

>>743529
Most places (i.e. everywhere that's not the USA) you don't get furnaces, so you don't get furnace filters.

It's a HEPA fiter. Get them off eBay ("HEPA filter"), or from an auto shop ("pollen filter").

[Anonymous No.743632]

>>743583

hi welcome to DIY newfag. the filters used in that DIY filter fan are normal filters you can buy for your AC/furnace. they come in various designs from cheap as fiberglass ones to ones that can stop microns of particles. its designed as a simple filter device it doesnt need HEPA filters to work, why dont you research shit more before you post.

[Anonymous No.743682]

>>743583
>Most places (i.e. everywhere that's not the USA) you don't get furnaces
I'm pretty sure furnaces are universal outside of the tropics.

[Anonymous No.743849]

>>743518
>>743529
>>743632
>>743682
just fyi USA isn't the whole world and furnaces are not common here

[Anonymous No.743855]

>>743849
I'm in Canada. Literally every house has a furnace besides the ~1% that have hot-water heating.

[Anonymous No.743861]

>>743855
In the UK I have never see a house with a furnace

We have gas an combi boilers running to radiators

[Anonymous No.743864]

Obviously depends on what you're filtering out of the air and how much you care about the possibility of developing a lung disease or cancer.

Those little fans are an absolute no-go regardless of what you're cutting. Go to lumberjocks.com and search for "air cleaner" and you'll see some good diy builds. Either make a good one or buy a good one, your health is worth it.

Even a used hepa air purifier meant for home use would be better than computer fans or box fans. The box fan with a filter added to it does work though, but won't capture the most dangerous 1 micron and under particles

[Anonymous No.743884]

>>742186
>... i have access to about 30 desktop fans .... also tips on how to wire it to a 120v power source would be appreciated as ive never done anything electric
This is the main problem you have with using normal PC fans: the cost of the power supply is going to be more than the fans themselves are worth.

it is better for you to just go shopping for some fans that can run right off wall current power. And you can find little PC-sized fans that will do that. But they're not going to be free. ....... After that all you need is a switch, but I might stick a proper fuse in there also.

The ONLY reason to bother with using DC fans for something like this is if you wanted to have the fans variable-speed.
The circuitry to run a synchronous AC motor at variable speeds is rather complicated and expensive, so it is usually cheaper to just get DC fans and run them through a mosfet hooked to a DC power supply.

[Anonymous No.743998]

>>743849
>>743583