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  #1  
Old 07-02-2013, 09:23 PM
ericher69 ericher69 is offline
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Default Air cleaner

Looking at a King air cleaner. 3 speed 500-700-1000+ CFM

Info

Shop size 26x26ftx8ft walls with peaked ceiling approx 15ft high

Questions

1. Will this be helpful to filter the air when welding, grinding and sanding?

2. Can I get away with a smaller unit 400cfm?


Price difference is $115 before tax from smaller to larger unit

I always wear a 1/2 face respirator but want to clean the air to prevent covering everything with metal dust

Thanks

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  #2  
Old 07-02-2013, 10:32 PM
tenfingers tenfingers is offline
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I use a 20 x 20 fan with a furnace filter taped to it. Not too good in the looks department but it gathers a lot of dust. I usually vaccume the filter about twice a week.

Others have built boxes with multiple filters using a furnace blower for power.

These can be found on many woodworking websites.
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Old 07-02-2013, 11:35 PM
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I have a 350 CFM fart fan in my garage it will hardly draw out cigarette smoke much less anything else . I would agree get ahold of an old squirrel cage out of a furnace and it will draw out most anything you want " Remember " you will have to let air into the shop somewhere in order for any fan to draw air out . Around here you can get squirrel cages almost anytime on craigslist for around $25.00 . I give them to freinds all the time in exchange for a new extension cord since I put one on the fans to begin with .


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  #4  
Old 07-03-2013, 06:00 AM
ericher69 ericher69 is offline
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Here is what I am looking at;

http://www.kingcanada.com/Products.htm?ID=22029

I don't intend or need to open a door/window as it just circulates/cleans interior air.

I have a makeshift smoke extractor I made up using my rigid shop vac to catch most smoke from the welding process

Thanks

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Last edited by ericher69; 07-03-2013 at 09:10 AM.
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  #5  
Old 07-04-2013, 02:20 AM
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akabull akabull is offline
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Those work fairly well. I made one out of a small squirrel cage blower from a printing plate processor about 13 years ago. Still use it today.
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Old 08-01-2013, 02:21 PM
threepiece threepiece is offline
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Quote:
Originally Posted by ericher69 View Post
Here is what I am looking at;

http://www.kingcanada.com/Products.htm?ID=22029

I don't intend or need to open a door/window as it just circulates/cleans interior air.

I have a makeshift smoke extractor I made up using my rigid shop vac to catch most smoke from the welding process

Thanks

Sent from my iPhone using SFT
I am not a fan of those recirculating filter types. I like to get the bad air out and bring in the (relatively) good air. The problem of coarse is heat loss. As my shop time is mostly in the winter this is a real issue for me. When I remodel my shop within the next two years I plan to install a central vac system of my own design. The basic design is to have a series of four inch drops with flex hose in various locations. The idea is to be able to position the small hose very close to the point of creation. Doing this I think will allow me to keep the air clean without moving much air/heat outside. IE the air I will be removing will have a relatively high concentration of contamination.
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  #7  
Old 08-01-2013, 03:12 PM
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milomilo milomilo is offline
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Quote:
Originally Posted by ericher69 View Post
Looking at a King air cleaner. 3 speed 500-700-1000+ CFM

Info

Shop size 26x26ftx8ft walls with peaked ceiling approx 15ft high

Questions

1. Will this be helpful to filter the air when welding, grinding and sanding?

2. Can I get away with a smaller unit 400cfm?


Price difference is $115 before tax from smaller to larger unit

I always wear a 1/2 face respirator but want to clean the air to prevent covering everything with metal dust

Thanks

Sent from my iPhone using SFT
The grinding dust, metal dust, is heavy and usually will not be captured by the air cleaner you linked to. If you have a 20x20 box fan with a furnace filter right next to where you are grinding you will get some but not all.
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