Ventilation System

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Well I decided I need something better then a small fan through the wall to draw the smoke and fumes out of the shop. Came up with a idea using a fan from a hot air furnance. Its not to scale and It may change some as i go, but you get the idea anyway.Miller DVI2Lincoln Precision Tig 225Thermodynamics Cutmaster 38Everything else needed.
Reply:got some of it started today. Wish I could have gotten more done. One thing I forget to add in the drawing above is that I will have dampers in the piping so I can control the amount of air being sucked out. Trying to keep as much of the heat as possible in the winter. Here are some pictures for you.Miller DVI2Lincoln Precision Tig 225Thermodynamics Cutmaster 38Everything else needed.
Reply:nice set up, I would use an electrical box and a switch for on and off, and make sure you fasten down that wire so it doesn't end up in your pulley, that would be a shocking thing however a good test of your breakers.....nice set up, wish I had one too.Guy_48Welding is an art......Millermatic 252Lincoln SP175PlusLincoln 225 AC/DC
Reply:If your not going to use both pickups at the same time, how about a shut off plate/valve to close the one your not using and put more suction to the one you are?If you don't want to stand behind our Troops, feel free to stand in front of them.
Reply:I'm wondering how that fan-motor combination is going to deal with air flow restrictions and/or variable flow rates? Won't take much additional loading before the amps on that little motor will climb way up there, get hotter than heck. Maybe restricting it on the input side it'll just void out more than load up. You got an ammeter so you can watch it for awhile?
Reply:That is a helluva start!I need something like that in my new shop!DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:Originally Posted by SWellsIf your not going to use both pickups at the same time, how about a shut off plate/valve to close the one your not using and put more suction to the one you are?
Reply:I should have guessed you'd be 1 step ahead of me, good job!If you don't want to stand behind our Troops, feel free to stand in front of them.
Reply:Originally Posted by SandyI'm wondering how that fan-motor combination is going to deal with air flow restrictions and/or variable flow rates? Won't take much additional loading before the amps on that little motor will climb way up there, get hotter than heck. Maybe restricting it on the input side it'll just void out more than load up. You got an ammeter so you can watch it for awhile?
Reply:Seeing how we're micro-analyzing this, if your shop is like mine there are probably enough leaks to provide make up air. Any benefit to putting an intake vent in the opposite corner to pull the air across the shop.If you don't want to stand behind our Troops, feel free to stand in front of them.
Reply:Originally Posted by SWellsSeeing how we're micro-analyzing this, if your shop is like mine there are probably enough leaks to provide make up air. Any benefit to putting an intake vent in the opposite corner to pull the air across the shop.
Reply:It certainly sucks.......LOL. Looks good!!!!Miller blue star 2eLincoln 175
Reply:Danggggggg I can remember when my shop was that clean, it lasted about 3 days as close as I can remember. I know it's bad of me but I'm old and HAPPY,,,,,,,lol
Reply:Got a little more time on my new ventilation system. I really need to stick with one project before I start another . Oh well, I actually got to run it today and the motor worked great and the draw was prefect on the low speed. All I need is a few more pieces and everything will be completed. Got the door made and on.added a foam seal strip and the bottom hole.Made a small hoodAnd the piece through the wall. I need to add a rod that will open and close the door from inside, I just screwed the door shut for now. I all added the foam seal like the inside door. Need to keep the warm air in. Also the the piece through the wall is on a slight slant to the outside in case any condensation forms on the metal.Miller DVI2Lincoln Precision Tig 225Thermodynamics Cutmaster 38Everything else needed.
Reply:Good job, how is it for noise when running?If you don't want to stand behind our Troops, feel free to stand in front of them.
Reply:not bad at all, you can hardly hear it running, The fan on the welder is louder.And thanksMiller DVI2Lincoln Precision Tig 225Thermodynamics Cutmaster 38Everything else needed.
Reply:cool set-up I was thinking of some sort of vetalation system also,but wasn't sure what way I wanted to do it.Can I steal some of your system layout?If it's too . get an office jobLincoln wp225g7 Lincoln 250 idealarcFrankenstein O/A set-up Weld-tech  tig set-upLincoln sp 175 plus profax  arc gouger
Reply:by all means man, It's  cheap and works which is all we need LOLMiller DVI2Lincoln Precision Tig 225Thermodynamics Cutmaster 38Everything else needed.
Reply:Well I finished the last couple pieces and tried it out. Works great. I could have the fan running a little faster on low speed though. I may change it some time soon.Miller DVI2Lincoln Precision Tig 225Thermodynamics Cutmaster 38Everything else needed.
Reply:Nice setup, when I get around to building one, I'm keeping this thread in mind. Good job man!If you don't want to stand behind our Troops, feel free to stand in front of them.
Reply:Nice job with the sheet metal hood/door Jamlit. I see the snow is melting there! Its melting here too, I forgot what my yard looked like
Reply:Wow! Nice job. I don't know much about furnaces but, at work we have a waste oil one.When the guy's came to clean it they said to be careful when we turned on our vent system because it could cause some problems with it. May not be anything to worry about. Just thought I'd throw it out there. "Every choice you make will effect at least one other person"
Reply:Originally Posted by woodironmanWow! Nice job. I don't know much about furnaces but, at work we have a waste oil one.When the guy's came to clean it they said to be careful when we turned on our vent system because it could cause some problems with it. May not be anything to worry about. Just thought I'd throw it out there.
Reply:BTW, nice make-shift couch jamlit. lol. is that out of the minivan? does the wife know about this? Later,Andy
Reply:Originally Posted by jamlitI know what you are talking about here. When ever I have the fan on I need to make sure that a window or door is open . If I forget, when the furnace runs I start pulling fumes for the furnace pipe. Stinks real bad and the burner flame can be off a bit. Best part about this setup is all I need to do is open the window and the ventilation system does it's job and Thanks for the comments guys.You shouldn't have any issue with loading the motor more due to an air restriction - that's actually the opposite of how a centrifugal blower like that works.  The less air that goes through the fan the less load the motor sees...
Reply:Very nicely done, I am on a very tight budget and used an old range hood with a 2 speed propeller type fan, to build a simpler version of this but basically the same setup, using a 8" pipe off the hood to the outdoors with the fan mounted at the hood inside the exhaust pipe, basically pushing the air through the pipe (wonder if I mounted the fan nearer the exit would pulling be more efficient?), anyway I just open the attic hatch in my ceiling when I have to use fan to allow for fresh air to enter as smokey air is extracted through the hood, my attic in the garage has vented soffets all along so fresh air is easily moved through the attic space, I have the garage insulated with R20 in celiings but still record a +5 degree F temp dif between the attic air and outside air, so the air I am pulling from the attic is easier for recovery on my heating system, also have a furnace filter in attic opening to prevent fiberglass particles from entering workspace. Works good for my needs, would love to have your fan and motor, that would suck the flux off my welds as well as the smoke.OOPS didn't realize this thread was from 2008 when I replied, sorry for bring back such an old thread.Last edited by jfl1960; 03-07-2012 at 09:39 PM.
Reply:Originally Posted by jfl1960Very nicely done, I am on a very tight budget and used an old range hood with a 2 speed propeller type fan, to build a simpler version of this but basically the same setup, using a 8" pipe off the hood to the outdoors with the fan mounted at the hood inside the exhaust pipe, basically pushing the air through the pipe (wonder if I mounted the fan nearer the exit would pulling be more efficient?), anyway I just open the attic hatch in my ceiling when I have to use fan to allow for fresh air to enter as smokey air is extracted through the hood, my attic in the garage has vented soffets all along so fresh air is easily moved through the attic space, I have the garage insulated with R20 in celiings but still record a +5 degree F temp dif between the attic air and outside air, so the air I am pulling from the attic is easier for recovery on my heating system, also have a furnace filter in attic opening to prevent fiberglass particles from entering workspace. Works good for my needs, would love to have your fan and motor, that would suck the flux off my welds as well as the smoke.OOPS didn't realize this thread was from 2008 when I replied, sorry for bring back such an old thread.