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Post by grandinquisitorkris on Apr 16, 2018 10:45:43 GMT
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Post by sgtslag on Apr 16, 2018 18:01:41 GMT
Kris, I would like to offer a few suggestions for your paint hood.
Seal up the openings, not to prevent paint from escaping (it won't, as you pointed out), but to improve the negative air pressure inside the box.
Insert a particulate filter (furnace filters work great), to capture paint particles before they enter the fan/motor assemblies, and the vent tubing.
Option: make an activated charcoal filter, to avoid the need to vent out the windows (plans available on the Internet). The activated charcoal filter will absorb the chemicals, releasing filtered air into the room, without fumes.
Otherwise, nicely done. Cheers!
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Post by grandinquisitorkris on Apr 17, 2018 0:53:59 GMT
Kris, I would like to offer a few suggestions for your paint hood. Seal up the openings, not to prevent paint from escaping (it won't, as you pointed out), but to improve the negative air pressure inside the box. Insert a particulate filter (furnace filters work great), to capture paint particles before they enter the fan/motor assemblies, and the vent tubing. Option: make an activated charcoal filter, to avoid the need to vent out the windows (plans available on the Internet). The activated charcoal filter will absorb the chemicals, releasing filtered air into the room, without fumes. Otherwise, nicely done. Cheers! thanks 1) the inside volume of the box is about 3.3 cubic feet , and the 2 fans together vent almost 100 cubic feet per minute , so the air in the box is there for less that 2 full seconds . so the negative air pressure isnt an issue with this set up . i will probably seal it later on after a few more upgrades , but as good as its working now its not necessary . 2-3) anything i insert will hamper the airflow , and while a filter or charcoal is a good idea , i would need to increase the number of fans to reach the same volume capacity , and that would mean more fumes escaping into in my room from the opening waiting to get vented .
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Post by skunkape on Apr 17, 2018 14:19:32 GMT
Cool paint hood! I might end up doing something similar and I live in a house.
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Post by sgtslag on Apr 17, 2018 16:42:54 GMT
Agreed, the charcoal filter will add resistance. Could insert a shop vacuum in between, or at the outlet of the charcoal filter, to assist with pulling the air out. They also make inline fans that are in duct pipe sections, less than US$50. It really depends on how much you want to avoid opening your window, to vent outside.
I live in Minnesota, so in the Winter, I do NOT want to vent to the outside. I've toyed with doing this, for several years. I finally gave up, switching to brush-on Gesso primer. Cheers!
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Post by grandinquisitorkris on Apr 19, 2018 1:18:53 GMT
Agreed, the charcoal filter will add resistance. Could insert a shop vacuum in between, or at the outlet of the charcoal filter, to assist with pulling the air out. They also make inline fans that are in duct pipe sections, less than US$50. It really depends on how much you want to avoid opening your window, to vent outside. I live in Minnesota, so in the Winter, I do NOT want to vent to the outside. I've toyed with doing this, for several years. I finally gave up, switching to brush-on Gesso primer. Cheers! my previous attempt at a painting hood used an inline fan , it was ridiculously under powered . i may use it in the upgrade though by putting it in the exause box to help pull the air and create negative pressure in the exauste to help deal with any leaks there .
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Post by sgtslag on Apr 19, 2018 13:59:38 GMT
Good to know that the inline fans may be under-powered. I wondered about that. The CFM rating is hard to judge because I have no prior experience with fans and CFM ratings... Glad to hear you can find a use for it, since you have it. My thought is, every bit of fan power you can employ, will only help. It may be just enough boost, to help push the air along. Cheers!
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