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Topic Review (Newest First)
04-18-2012 11:40 PM
leverhead Don't mess with your health....not worth the risk. I've been using a Hobby Air unit for years now (but not every day) for things like painting and welding and they work great. Worth the $$$. I have the unit plumbed thru the wall to the outside so I just connect my hose on the inside and turn the unit on outside (raised up off the ground) and get clean fresh air. Regards.
03-29-2012 02:54 PM
boatbob2
Huh ???

Hi,let us know if it kills you, so we wont try it,,,,,,
03-29-2012 02:09 PM
777funk Measured the CFM of the bucket max shopvac head and it's way high. I'd guess around 10 CFM or more (pegged in a big way a small 6 CFM gauge). Seems like the airflow should be enough to keep me alive. We'll see!
03-22-2012 01:40 PM
AutoGear The fumes you smell aren't the ones to be worried about most. Isocyanites are odorless and tasteless (apparently). In fact most home respirators guys use to paint a car (the NIOSH type) aren't recommended for what we do.
www.autobody101.com has beat this to death for years it seems (in fact, thats where I first ran into MartinSR).
03-14-2012 08:02 AM
777funk I wish there were an easy way to measure Co2 levels in the hood. I'm going to measure the flow rate of the incoming air to at least see what that is. So far I feel fine with this on for 10-15 minutes at a time (as long as I usually spray). I may add a snorkel and breathe out through it in order to keep carbon dioxide out of the hood.
I definitely smell ZERO paint. So that's a good thing!
03-13-2012 12:31 PM
777funk
Quote:
Originally Posted by 777funk
The ShopVac Bucket max is around $20 and has the blower fan separate from the motor. It's got a pair of filters (foam and cloth). I'd bet it'll work. I just bought one tonight so we'll see.
So far it seems to work well and I'd think is enough air. I have 12' of ebay CPAP (for people with sleep apnea) hose connected to the shop 1.25" hose with duct tape and the other end in my fresh air hood (an actual fresh air hood I found on ebay from a surplus place cheap).

My only worry is that I could forget to turn the air supply on. I suppose I'd smell paint soon enough as a reminder.

Of course this is jerry rigged and definitely not tested or commercially designed as such, but I'd bet it's healthier than paint fumes. I can't smell even a hint of paint with this on.
03-08-2012 11:15 PM
777funk The ShopVac Bucket max is around $20 and has the blower fan separate from the motor. It's got a pair of filters (foam and cloth). I'd bet it'll work. I just bought one tonight so we'll see.
03-07-2012 08:39 PM
fireboat I think the others are right, unless you spend the big bucks for good quality filters, it is best not to go the compressed air route.

I'm sure I will get some flak, but I built my own fresh air system and have been using it for years. I bought a new vacuum cleaner motor on ebay for about $70, the impeller is sealed from the motor so you are not breathing air that passed through the motor. I built a wooden box with a switch, an inlet air filter, discharge pipe and a bypass valve. I use the cheap corrugated medical blue ventilator hose connected to my surplus fire department Scott full face mask. All told, I guess I have about $150 in it.

It is noisy, but the air is cool and clean. Still the easiest way is to simply buy a Hobbyair. It seems like a lot of money but the peace of mind is great not to mention your body will thank you too.
03-07-2012 11:27 AM
777funk
Quote:
Originally Posted by ogre
either fan will work, but you will need a 4'' duct to carry enough air to stay alive.
imagine dragging a 30 ft length of duct while trying to paint a car...
You're right, I can't see much air getting through the 1" hose on most air hoods.

I tried a Coleman air mattress inflator (like a small blow dryer) years ago, it worked but it tended to blow hot air and it smelled pretty bad like plastic. I eventually retired it to being a blower to help my charcoal grill heat up faster.
02-25-2012 09:40 PM
ogre either fan will work, but you will need a 4'' duct to carry enough air to stay alive.
imagine dragging a 30 ft length of duct while trying to paint a car...
02-25-2012 04:06 PM
777funk I've thought about trying to use the blower fan from a car as the fresh air supply. I'm sure it'd be more than enough CFM's. But the 12V thing is what's held me back on that.

Maybe an old hotel air conditioning unit blower. The guy who owns our hardware is always scrapping those things.
02-25-2012 06:51 AM
Irelands child By the time you get that shop air system sorted out and the material needed there is a pretty good chance that you have come close or could have paid for a Hobby Aire system seen here. From personal use, these work just fine. I pulled my fresh air from a cool basement and used a 50 foot RV water hose that I have as the hood air supply - it's quite a bit more flexible then the one supplied.

That Harbor Freight air separator will need a further separator after it as it really doesn't do a good job. I used one of them along with a Sharpe - absolutely no water carry over.



This wasn't the final configuration as I added this pressure regulator and straightened out the plumbing:



.....and it worked for me
02-24-2012 10:30 PM
TucsonJay I was asking the same question, and found out that "oil-type" air compressors produce carbom monoxide.... because there is oil in the cylinder during compression.

You would need to use a diaphram-type, also known as "oiless" compressors. I switched over, and now do what you were talking about. I will add that they are not inside the booth sucking paint fumes. :-)
02-24-2012 10:21 PM
Powork I know when the divers came to clean the bottom of my boat they just had a little oil less compressor that they set on the dock. Don't know the brand or anything. Sure didn't look like an expensive setup.
02-24-2012 10:11 PM
OneMoreTime You need the proper filters to use shop air and yes they are expensive...the better option is to go with a dedicated fresh air system such as the Hobby aire or similar and picking up fresh air from an outside source..
Just my take

Sam
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