Making a ducted soldering fan? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: July 05, 2022, 01:02:48 pm
content: Hi,I wish to solder in a room that hs no windows going externally...their are windows but only to internal.But it also has a ~12cm diam metal pipe sticking out of the roof by some 15cm.....so if somehow i can strap a tube to this, and put a fan in the tube so that i can extract solder smoke, then it will be OK.Do you know of any means of doing this?The bottom of the metal tube is some 6 foot above floor level.The idea would be to have the soldering work table below the metal tube thing, and the fan to duct the smoke away up it.(The room is approx 2 metres by 5 metres by 3 metres high)https://www.ebay.co.uk/itm/392156761429?_trkparms=amclksrc%3DITM%26aid%3D1110002%26algo%3DSPLICE.SOI%26ao%3D1%26asc%3D240307%26meid%3D9b39fd406a444b59a796ab9adeec4d17%26pid%3D101196%26rk%3D3%26rkt%3D12%26sd%3D391869766752%26itm%3D392156761429%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DPromotedSellersOtherItemsV2WithMLRv3%26brand%3DUnbranded&_trksid=p2047675.c101196.m2219&amdata=cksum%3A3921567614299b39fd406a444b59a796ab9adeec4d17%7Cenc%3AAQAHAAABILB59iZaq6L1SxCGLGoiBqHdpPz8nqKyKuGL1QIa0H%252B4qy9KoNAS5eUQFBGYTW9WeeaBtdWYkrMfWvCl3XrMLwPzf2R%252F5rNVK9z292ur5uSv8qxikB2Q0%252Bo7ytAkQDk9Ts1mtD7IdLSUhpAZvI9WB1SX5DBOKi6apf56z0AFSgYmPZEp0TcS%252BQm%252F6I0va1mXKxng92Uy6QI3V0TSQeSY%252B4wKI2hxVkIHRAC19r35tzuvmLP%252FzP72Q1PwCb5KRWBpzRau9eF19b%252BkjFkgQeHs1eY9tuuW2HTjJ49zrK0cuWukENjW9pPDDPcnoXAsBB2Kik87A4Bo%252BXxrkxAuw4osvVLYrFuTjDWkz9wcrRqnn4TSjfs%252BS0Rt5IAHMqkZchhvmQ%253D%253D%7Campid%3APL_CLK%7Cclp%3A2047675https://www.ebay.co.uk/itm/173031223298?epid=22011339458&hash=item284976f002:g:b30AAOSwYz1hdb-Q&amdata=enc%3AAQAHAAAA4H%2Bz3KDh6FoCsznkHDgDAvbxOGUcwaS1hJit6TLyXBKNQHny61OxUxwcvsmPfbQxXnG56kaU6f%2BLegBwUyBKGoZCMDxxI5WjgB5Dh%2FSuzxZC6p%2Fl4l%2F219yQf98Um4lxwH82Ic8vIiitxHBGZ2DXAut2Fo5Gm%2FzlNAau2oQnz8YvZvmuH2A%2FyXjfhJ7PHsnQ03ym8y5ztBpQzH5lTVOHypAlHKppgwuafpG%2F9XqBQUkGYsiZ6NnmAmYCwGCyd5Rm%2BV8cr2VxaK44MA%2F%2Btl9WTkaUIFfzDxkwzrTEIpILlSVY%7Ctkp%3ABFBMvOHD7blgThe above filter fans never seem to work.The ducted fans, do they overheat if you put tubing each side?....one tube to the pipe...one to the work?

author: thm_w
author_rank: Super Contributor
timestamp: July 05, 2022, 11:53:04 pm
content: First link would work, but looks quite loud. No it will not overheat.QuoteSecond link is garbage as you say, does not work well.What you want is some ducting, either rigid or flexible aluminum, up to you:https://www.ebay.co.uk/itm/110851437541Then either aninline duct fanthat matches the duct diameter, or a decent 12V 120 or 140mm fan. Normally I would never use a PC fan as they have poor static pressure. But in this case, a decent PC fan could work as you have little restriction.If you go with the cheap option (120mm fan) then you find a way to adapt the duct to the fan, to the exhaust. Its nice if the fan is further away, then the noise won't bother you, but, that can be a bit more wiring work. A lot of people will just put the fan on the duct intake side. Use a 3d printer to adapt the fan to the duct, or cardboard and duct tape, whatever works.https://www.thingiverse.com/thing:4403027https://www.thingiverse.com/thing:4843928https://www.thingiverse.com/thing:759705https://www.instructables.com/DIY-Solder-Fume-Extractor-Box/

author: themadhippy
author_rank: Super Contributor
timestamp: July 06, 2022, 12:02:36 am
content: Quotepossible 125mm/5", a pretty standard duct size.All you need is a bit of 5" flexible duct an inline 5" duct fan,and some jubilee type duct clips,short bit of flex duct to the fan from the fixed pipe,then a longer bit of flexy from the fan to just above your work station

author: Faringdon
author_rank: Super Contributor
timestamp: July 07, 2022, 08:42:14 am
content: Thanks,https://www.ebay.co.uk/itm/321729165533?hash=item4ae88d78dd:g:kvMAAOSwwG1bOm83...the above is cheap and on ebay.....i presume duct tube can only be placed on one side of it, not both?...(only one side is roughened)

author: Gyro
author_rank: Super Contributor
timestamp: July 07, 2022, 09:01:26 am
content: You neede to get off ebay and chinese knockoffs and start looking at screwfix, toolstation and similar building suppliers. Ducted impeller fans typically have poor performance, you need to go for a centrifugal fan. These have much greater airflow and drive the back pressure from the duct far better.Edit: Just an example from a quick search... 2 speed 180 / 245m2/hr.https://www.toolstation.com/airvent-100mm-mixed-flow-inline-extractor-fan/p80615Use the shortest practical duct before the fan and the greatest after.

author: Shock
author_rank: Super Contributor
timestamp: July 07, 2022, 01:17:26 pm
content: I've seen people diy overhead extraction by using cheap roasting pans and cut a hole. You can also make a box and mount an array of pc fans on the front and stand it on the desk or hang it over etc.It's still best to have ventilation to the room if it's a small space, a pedestal fan blowing a bit of air into the doorway is better than nothing. Get a fire alarm as well.

author: ebastler
author_rank: Super Contributor
timestamp: July 07, 2022, 07:27:06 pm
content: Have you considered cooker hoods? If you have the option to wall-mount one above your workplace, they should provide decent fume extraction at air flow rates which don't get uncomfortable, due to the large cross section of their air intake.Being consumer products, they are relatively inexpensive -- starting below 60 GBP if I look on amazon.co.uk. And you even get free overhead lighting built in!

author: jpanhalt
author_rank: Super Contributor
timestamp: July 07, 2022, 07:36:35 pm
content: Quote from: Faringdon on July 07, 2022, 08:42:14 amRoughened v. smooth: Why would either prevent or facilitate you from attaching a duct? There are things called duct clamps. Come on, your worries and procrastinations are getting beyond the absurd. Please do not ask whether duck clamps will work too. They won't.

author: jc101
author_rank: Frequent Contributor
timestamp: July 08, 2022, 08:43:14 am
content: If you are pushing air out of the room via the duct, I trust there is a grill somewhere to permit replacement air in, or will you just leave the door open a crack? Naturally, this depends on how well the door seals when closed...

author: Faringdon
author_rank: Super Contributor
timestamp: July 09, 2022, 08:59:48 am
content: Thanks yes , the internally opening windows will be open.