Your right.... There are already a bunch of threads and you should probably read them. There is a lot of good info. I will attempt to get you "caught up" quickly and then I am sure other people will chime in.
The issue with exhaust fans (and a bit controversial) is if they really need to be explosion proof even with filters in front of them. Remember if you are pulling your fumes through them to exhaust the room there is a potential that the fan will ignite the fumes.
The theory is to pressurize the room by blowing fresh air into the room. Still through a filter to control dust, but no fumes will be going through the fan. Then use filters on a plane opening (no fan) to allow the fumes to escape the room.
Fresh air... you need to use more than just a hose. You need to buy or build a fresh air system. I chose to buy a SAS fresh air system with hood for aprox $750. This way I new it was safe. I bought the pull over hood as a kit. I am now looking to upgrade it will a full face mask. The full face mask does not protect your head and neck etc, but seals better and IMHO protects your lungs better.
Hope that helps to catch you up.
The issue with exhaust fans (and a bit controversial) is if they really need to be explosion proof even with filters in front of them. Remember if you are pulling your fumes through them to exhaust the room there is a potential that the fan will ignite the fumes.
The theory is to pressurize the room by blowing fresh air into the room. Still through a filter to control dust, but no fumes will be going through the fan. Then use filters on a plane opening (no fan) to allow the fumes to escape the room.
Fresh air... you need to use more than just a hose. You need to buy or build a fresh air system. I chose to buy a SAS fresh air system with hood for aprox $750. This way I new it was safe. I bought the pull over hood as a kit. I am now looking to upgrade it will a full face mask. The full face mask does not protect your head and neck etc, but seals better and IMHO protects your lungs better.
Hope that helps to catch you up.
