Dc-3300

algale · Post by **algale** » Sun Jul 29, 2012 6:23 pm

[quote="fjimp"]I do not claim to be a scientist or intelligent. However after reading the original discussion on this subject tried different numbers of hoses and purchased the gates that allow partial opening of any or all or none of the gates.

What I found first hand is]

Fair point. Supposedly aeronautical engineers have determined that bumble bees can't fly because the bees have an inadequate thrust to weight ratio. But nobody told the bees.

charlese · Post by **charlese** » Sun Jul 29, 2012 9:24 pm

dusty wrote:You are working in a closed shop, Jim. I understand the claim of better performance in that environment. What advantage would the 1 Micron Bag have over the others if it was sitting in an open garage door like in my shop.

I hardly ever work in the shop with the door closed. Thus, I would describe my shop as being open air.

No Brainer! The 1 Micron Bag will hold more dust and avoid most of the very fine stuff from floating around in the semi closed area of a garage with an open door. Reference the post (#9) from fjimp.

JPG · Post by **JPG** » Mon Jul 30, 2012 10:09 am

fjimp wrote: . . .
Now here is the part of this that has always fascinated me. The open port (with no hose on it) is the port facing down toward the floor and still never allows any of dust collected to escape and fall to the floor.

. . .

Another 'no brainer'! Air coming into that open downward facing port will deflect stuff coming into the side ports away from that port opening. The stuff does not accumulate near the ports, so nothing is there to fall out when it is not 'sucking'.

fjimp · Post by **fjimp** » Mon Jul 30, 2012 10:35 am

JPG40504 wrote:Another 'no brainer'! Air coming into that open downward facing port will deflect stuff coming into the side ports away from that port opening. The stuff does not accumulate near the ports, so nothing is there to fall out when it is not 'sucking'.

Nor does anything fall out when there is sucking going on. But then I figured you already knew that:D Jim

letterk · Post by **letterk** » Mon Jul 30, 2012 11:27 am

JPG40504 wrote:Another 'no brainer'! Air coming into that open downward facing port will deflect stuff coming into the side ports away from that port opening. The stuff does not accumulate near the ports, so nothing is there to fall out when it is not 'sucking'.

I took it Charlese was referring to the fine dust cloud that goes through the filter bag. I don't think he meant it was coming out a open port.

Maybe I'm wrong about what he meant or about what I am thinking, but even with a garage door open, the cloud doesn't just disappear out the open door. You are still going to have exposure to the fine dust cloud , but albeit many at a lower concentration with the garage door open.

The one benefit of running a second port open, although it may slow the CFM to the first hose, I could see is that it may inflate the bag better allowing more surface for filtering. I have a 32" bag, 2.5 micron bag (not SS) and with one port open the airflow isn't enough to make the bag stand up.

I have to say the original bag on a 20+ DC3300 leaves a lot to be desired.

JPG · Post by **JPG** » Mon Jul 30, 2012 6:20 pm

letterk wrote:I took it Charlese was referring to the fine dust cloud that goes through the filter bag. I don't think he meant it was coming out a open port.

Maybe I'm wrong about what he meant or about what I am thinking, but even with a garage door open, the cloud doesn't just disappear out the open door. You are still going to have exposure to the fine dust cloud , but albeit many at a lower concentration with the garage door open.

The one benefit of running a second port open, although it may slow the CFM to the first hose, I could see is that it may inflate the bag better allowing more surface for filtering. I have a 32" bag, 2.5 micron bag (not SS) and with one port open the airflow isn't enough to make the bag stand up.

I have to say the original bag on a 20+ DC3300 leaves a lot to be desired.

Ahem! When I quote member 'J', I am not referring to anything member 'C' has said.

charlese · Post by **charlese** » Mon Jul 30, 2012 10:07 pm

And yet - another no brainer. The greatest benefit of the tallest 1 micron filter bag - It is an accepted fact that pollution particles less than 1 micron are the most harmful to a person's lungs/decreasing oxygenation of blood.

A 2.5 micron filter allows a lot of 1 micron particles float around so they can be inhaled. These little buggers can't be seen unless you catch them in a ray of sunlight along with the visible bigger particles. The little ones don't fall to the floor, they just hang around until blown away, or filtered out by another filter.

fjimp · Post by **fjimp** » Mon Jul 30, 2012 10:32 pm

charlese wrote:And yet - another no brainer. The greatest benefit of the tallest 1 micron filter bag - It is an accepted fact that pollution particles less than 1 micron are the most harmful to a person's lungs/decreasing oxygenation of blood.

A 2.5 micron filter allows a lot of 1 micron particles float around so they can be inhaled. These little buggers can't be seen unless you catch them in a ray of sunlight along with the visible bigger particles. The little ones don't fall to the floor, they just hang around until blown away, or filtered out by another filter.

Well put Chuck. My bottom line is life. I have been plagued with lung issues my entire life. If I want to work wood or even try to be a grandfather to my youngest I absolutely must protect my lungs. I will never forget turning on the DC3300 equipped with the 1 micron bag for the first time and leaving a room filled with fine particulate then returning an hour later. The clear clean air provided a lesson I will not soon forget. Jim