I have done multiple searches and bought two books and a video on spray
finishing, and I still am not sure I have the right answer, so before I spend
more money than I need to, here goes:
I want to spray water based finishes in my garage, and want to build a knock
down open-end spray booth to control the overspray. I bought Michael
Dresdner's video on spray finishing, and he had a setup using 4x8 pieces of
cardboard. He had cut a square hole near the floor on the back panel, and
opened his garage door a couple of feet and then place an exhaust fan over the
hole. This is EXACTLY what I am looking to do. I plan to spray water based
ONLY, and my question is about the fan.
His looks like about a 24"x24" whole house fan. Its got its own metal "box",
and it looks like he has attached plywood to the top and bottom and maybe some
chicken wire or something in the front to hold some blue filter fabric. I'm
pretty sure its a house fan because it has the shutters on the back. Okay, so
I have found a similar fan at Lowes for $149, and the filter fabric, but...
Is the fan to big? I believe it will move around 2000 cfm. I have a 20x20
garage, but I figure I'm only drafting the air close to my spray enclosure. I
have read of people using explosion proof fans and axial turbine fans, but I
don't think I need that. I have also heard of people using 16" gable attic
fans, which I believe move about 1300 cfm or so, but I would need to build a
frame around it. I saw something similar to this used as a dust collection
setup in the Taunton Press "Workshops" book. I have also heard of using a
regular box fan, I believe it was in American Woodworker, and Dresdner uses one
in the video for a benchtop setup for small projects. That is a complicated
lead-in, but I wanted to let everyone know I did my research. So, given that
I'm not spraying any solvent based lacquers or anything like that, and will
probably use it to spray some latex paint most of the time (Porter Cable HVLP
conversion gun, 2.2 mm tip, gravity feed, 5 HP 20 gall Campbell Hausfield
compressor, already used it to spray cabinets and doors and it seems to work
fine, the wife likes the results) does anyone have any tips on what size fan I
should get? The difference between the house fan and the largest attic fan I
would buy is about $75, so its a fairly big deal, but I also want to make sure
I control the fumes and overspray. It will vent to the back of the house away
from the neighbors.
Anybody got any ideas or experience? Thanks in advance.
BW
BW,
I am also looking for some replies to your post. Basically, what works?
However, you may want to consider spraying more than water based. Shellac
forms an excellent barrier coat that will allow you to use water based dye
(or oil based stain) under a water based finish.
Terry
"BTWILL864" <[email protected]> wrote in message
news:[email protected]...
> I have done multiple searches and bought two books and a video on spray
> finishing, and I still am not sure I have the right answer, so before I
spend
> more money than I need to, here goes:
>
> I want to spray water based finishes in my garage, and want to build a
knock
> down open-end spray booth to control the overspray. I bought Michael
> Dresdner's video on spray finishing, and he had a setup using 4x8 pieces
of
> cardboard. He had cut a square hole near the floor on the back panel, and
> opened his garage door a couple of feet and then place an exhaust fan over
the
> hole. This is EXACTLY what I am looking to do. I plan to spray water
based
> ONLY, and my question is about the fan.
>
> His looks like about a 24"x24" whole house fan. Its got its own metal
"box",
> and it looks like he has attached plywood to the top and bottom and maybe
some
> chicken wire or something in the front to hold some blue filter fabric.
I'm
> pretty sure its a house fan because it has the shutters on the back.
Okay, so
> I have found a similar fan at Lowes for $149, and the filter fabric,
but...
>
> Is the fan to big? I believe it will move around 2000 cfm. I have a
20x20
> garage, but I figure I'm only drafting the air close to my spray
enclosure. I
> have read of people using explosion proof fans and axial turbine fans, but
I
> don't think I need that. I have also heard of people using 16" gable
attic
> fans, which I believe move about 1300 cfm or so, but I would need to build
a
> frame around it. I saw something similar to this used as a dust
collection
> setup in the Taunton Press "Workshops" book. I have also heard of using a
> regular box fan, I believe it was in American Woodworker, and Dresdner
uses one
> in the video for a benchtop setup for small projects. That is a
complicated
> lead-in, but I wanted to let everyone know I did my research. So, given
that
> I'm not spraying any solvent based lacquers or anything like that, and
will
> probably use it to spray some latex paint most of the time (Porter Cable
HVLP
> conversion gun, 2.2 mm tip, gravity feed, 5 HP 20 gall Campbell Hausfield
> compressor, already used it to spray cabinets and doors and it seems to
work
> fine, the wife likes the results) does anyone have any tips on what size
fan I
> should get? The difference between the house fan and the largest attic
fan I
> would buy is about $75, so its a fairly big deal, but I also want to make
sure
> I control the fumes and overspray. It will vent to the back of the house
away
> from the neighbors.
>
> Anybody got any ideas or experience? Thanks in advance.
>
> BW
"BTWILL864" <[email protected]> wrote in message
news:[email protected]...
> I have done multiple searches and bought two books and a video on spray
> finishing, and I still am not sure I have the right answer, so before I
spend
> more money than I need to, here goes:
>
> I want to spray water based finishes in my garage, and want to build a
knock
> down open-end spray booth to control the overspray. I bought Michael
> Dresdner's video on spray finishing, and he had a setup using 4x8 pieces
of
> cardboard. He had cut a square hole near the floor on the back panel, and
> opened his garage door a couple of feet and then place an exhaust fan over
the
> hole. This is EXACTLY what I am looking to do. I plan to spray water
based
> ONLY, and my question is about the fan.
>
> His looks like about a 24"x24" whole house fan. Its got its own metal
"box",
> and it looks like he has attached plywood to the top and bottom and maybe
some
> chicken wire or something in the front to hold some blue filter fabric.
I'm
> pretty sure its a house fan because it has the shutters on the back.
Okay, so
> I have found a similar fan at Lowes for $149, and the filter fabric,
but...
>
> Is the fan to big? I believe it will move around 2000 cfm. I have a
20x20
> garage, but I figure I'm only drafting the air close to my spray
enclosure. I
> have read of people using explosion proof fans and axial turbine fans, but
I
> don't think I need that. I have also heard of people using 16" gable
attic
> fans, which I believe move about 1300 cfm or so, but I would need to build
a
> frame around it. I saw something similar to this used as a dust
collection
> setup in the Taunton Press "Workshops" book. I have also heard of using a
> regular box fan, I believe it was in American Woodworker, and Dresdner
uses one
> in the video for a benchtop setup for small projects. That is a
complicated
> lead-in, but I wanted to let everyone know I did my research. So, given
that
> I'm not spraying any solvent based lacquers or anything like that, and
will
> probably use it to spray some latex paint most of the time (Porter Cable
HVLP
> conversion gun, 2.2 mm tip, gravity feed, 5 HP 20 gall Campbell Hausfield
> compressor, already used it to spray cabinets and doors and it seems to
work
> fine, the wife likes the results) does anyone have any tips on what size
fan I
> should get? The difference between the house fan and the largest attic
fan I
> would buy is about $75, so its a fairly big deal, but I also want to make
sure
> I control the fumes and overspray. It will vent to the back of the house
away
> from the neighbors.
>
> Anybody got any ideas or experience? Thanks in advance.
>
> BW
>>I seen Pro's use this same trick when forced to paint away from their
shop. The biggest problem is dust that comes from the surrounding room.
Most of the painters cleaned the work area fairly well and wet down the
floor to keep dust from being drawn into the spray area and on to the work.
Ed Angell
On 12 Nov 2003 02:26:38 GMT, [email protected] (BTWILL864)
brought forth from the murky depths:
>I have done multiple searches and bought two books and a video on spray
>finishing, and I still am not sure I have the right answer, so before I spend
>more money than I need to, here goes:
-snip of research-
IANAP, but...
I'd try the cheap box fan routine and an HVLP sprayer setup.
If it doesn't work well enough, go to a higher volume fan.
(Replace fan when it stops working due to gummy residues.)
Make sure you have a good (and direct) flow of air into the
"booth" and out the back. And make sure the flow of air is
in the proper temperature and humidity ranges for spraying.
(There's your Winter "Gotcha!")
G'luck.
Sure you wouldn't rather have a nice, hand-rubbed oil finish?
(Huh? Huh? Huh?)
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