Clean Room Exhaust fan

[jsburger]

I have a 10' X 12' finishing room in my shop. It has a JDS 1200CFM air filter hanging from the ceiling. Over the years it has been adequate because I don't do a lot of spraying. When I refurbished my first 10ER last year the spray primer made a mess. It dried before is settled on things so was easy to clean up but...

An exhaust fan seemed appropriate and an area to spray small items like the 10ER parts. Here is the result but it is still in work. The cabinet is actually an upper corner kitchen cabinet. They were on sale a Home Depot, it was damaged so I got an additional discount and I got my Military discount. About $40. The fan is 1200 CFM. The shop is so tight I needed make up air. In stead of just opening a window I put vents in the ceiling to get air from the attic. The thought was that in the winter if it is cold and sunny the attic air will be warmer than the outside air.

So here are the pictures of the progress so far.

[JPG]

Whodat on de ladder?

[jsburger]

Whodat on de ladder?

That is Griff the engineering tech (mechanical) I worked with every day at Hill AFB when we were solving problems on how to fix aircraft generators that were 40 to 60 years old. Lots of parts not available that were specified in the repair/overhaul technical orders. We also had to source new parts based on the specs on the original prints. We contracted some out but also made parts in the various machine shops on base.

[JPG]

OK incoming air from warmer attic in the winter.



Now what about the summer?

[jsburger]

OK incoming air from warmer attic in the winter.



Now what about the summer?

Crack the window. The outside air in the summer will be cooler that the attic air. Heat is not the problem. Sucking in cold air is.

[Hobbyman2]

Good call on the filter ,,,does it have a indicator that tells ya when to change the filter?

[reible]

As I recall from my old days designing labs that the fume hoods had to have special fans so that they did not go "BOOM". I forget the term but it would seem that most spray paints and such have flammable components as do cleaning solutions used to prep for painting. If the concentrations were right a simple spark of a motor starting could be a very bad thing.

Anyone recall the name of this sort of fan?

Was it as simple as explosion proof?

Ed

[jsburger]

Good call on the filter ,,,does it have a indicator that tells ya when to change the filter?

No it does not. I will just apply the visual check.

[jsburger]

As I recall from my old days designing labs that the fume hoods had to have special fans so that they did not go "BOOM". I forget the term but it would seem that most spray paints and such have flammable components as do cleaning solutions used to prep for painting. If the concentrations were right a simple spark of a motor starting could be a very bad thing.

Anyone recall the name of this sort of fan?

Was it as simple as explosion proof?

Ed

Yes I believe explosion proof is it.

I doubt the concentration will ever be high enough in my hobby shop. This is not a production shop where one would be spraying more or less constantly all day. If that were the case you would need explosion proof lights and light switches and anything else.

I have been spraying in there for 7 years with regular lights, light switch, electric base board heater and a 1200 CFM JDS air filter hanging from the ceiling.

How many of you routinely spray in your shop and never give it a thought?

[reible]

Again from my recollection the room concentration is quite different then the concentration of the duct where you are hoping that all the bad stuff is going. It would be much higher there and without looking into it I would worry.

I don't spray indoors. I'd like to but have no room and it is unlikely to ever have real life spray booth. But if I did I sure would look into the correct fan.

Now I also know that here we would need to have a building permit and codes to meet. If you don't then fine but at least it might be worth contacting your local fire department and see if they have some recommendations or guide lines.

Don't want to argue about it just wanted to mention it in case you hadn't thought about it.

Ed

As I recall from my old days designing labs that the fume hoods had to have special fans so that they did not go "BOOM". I forget the term but it would seem that most spray paints and such have flammable components as do cleaning solutions used to prep for painting. If the concentrations were right a simple spark of a motor starting could be a very bad thing.

Anyone recall the name of this sort of fan?

Was it as simple as explosion proof?

Ed

Yes I believe explosion proof is it.

I doubt the concentration will ever be high enough in my hobby shop. This is not a production shop where one would be spraying more or less constantly all day. If that were the case you would need explosion proof lights and light switches and anything else.

I have been spraying in there for 7 years with regular lights, light switch, electric base board heater and a 1200 CFM JDS air filter hanging from the ceiling.

How many of you routinely spray in your shop and never give it a thought?