Fan exhaust

C

cwlo

I am putting together a home spraybooth, and already sourced a 24" tubeaxial fan. I am trying to figure out the best place to vent the fan. I am in a fairly dense residential area, but do have fairly good separation from other homes of about 80 feet or so. (The garage is detached) My question is, is there much benefit to venting out the top of the gable ( 10-12' above ground), or out the roof straight up,, versus going out the door at ground level. There is some additional work to vent up, but am willing to do it if it is worth the trouble. Bottom line, My garage is in an alley. and I am trying to avoid exposing people to iso's. I'm already figuring on spraying at night, but want to avoid as many headaches from the neighbors as I can.


Thanks,​

Chris
 
spraying at night means humidity and bugs . if your that closed in you may want to rethink this. spraying paint in a residential area can get you in hot water quick.
 
Thanks Shine. I'm not worried about humidity or bugs, as I will be spraying in Winter here in Chicago. I've seen a number of bodyshops that are adjacent to residential homes....even closer than I will be so I'm not too concerned that it will be too problematic. However, they all seem to exhaust vertically and the outlet is maybe 15-20' up. Of course, they are spraying daily.
 
yes we have to vent at least 20ft. BUT if the shop is zoned right no problem, you at home are not zoned for it. believe me there are big fines for painting in residential .
 
ISO's are just the start. If they smell anything and make a call, well the jigs up. You also have to think of any overspray sticking to anything, it can travel. Night time is when the air is thinner and things can travel farther like when you yell at night it carries farther then during the day. You will need a wall with filters both for the overspray and charcoal filters for the fumes. You will also need an equal amount of iincoming air. You will also have to have a motor you can control the speed on to balance the exhaust so you are not exhausting too much. Heat is something else you have to consider open flames and overspray = a no no. Intake air for your heat must be looked into.
 
Yes, I will be addressing the overspray, heat, and fan control. Just to clarify, I am a home hobbyist and don't expect to be painting more than a car every couple years.
I've painted a bunch of cars in my youth under less than safe conditions, so now that i am older and have more $$, I want to do it right.
 
sounds ok until the code enforcement people show up and you loose your homeowners ins. it only takes one prick neighbor to get the ball started .
 
I would look at it as if you were installing a paint booth (it sounds like you want to do it right). With that being said, is the fan rated to have back pressure (exhaust through a duct), or must it vent to free air? If I could I would vent it through the roof if the fan can operate in that fashion. If the fan must operate in free air then through a door or wall may be your only option.

I live in a residential area and have a shop behind my house with a paint booth. The fan vents upward through the roof. The nearest home is less than 30 feet away. I've never had a complaint about my painting - either odor or noise (from the fan). When I'm outside and the fan is operating I cannot smell the odor of paint. Filters capture the paint particles. I've never seen the signs of overspray outside of the booth. But, my paint booth is permitted by the city building department (complete with a fire suppression system). I do not spray enough to be required to have a permit from my local air quality district but they do know about it and could drop by any time.
 
Yes, seems vertical discharge is probably preferred. I have a proper tubeaxial fan that most spraybooths use, so it will work no problem. I figure if I am discharging 15' off the ground, that should limit any odors significantly. I've also checked local and state codes, and I seem to have the green light. That said, I do not intend to bother anyone with my activity, and your comment that you haven't had any problems is reassuring. Thanks.
 
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