Double Flap Through Wall Vent

My exhaust system parts are now a fairly comprehensive system (albeit broken into several different postings – one day I will compile them all together) for exhausting machines to the outside but until now I have not posted a through-wall system. Here it is…

This through-wall venting port has two flap sets so that it is “double insulated” and more resistant to insects and other would-be assailants. I have been using this for a year or so but only now just posting it as I have had several requests recently.

The idea is that on the outside wall, you mount a 4″ duct plate that connects to a 4″ pipe through the wall, and onto which the double-flapped vent mounts.

On the inside, another 4″ duct plate, which connects to the other end of the pipe through the wall, and, on to which you can mount a variety of headers and or an inline fan to assist the exhaust system.

As you have probably seen from my earlier postings, I like having negative pressure in my exhaust system to ensure no leakage and assist the exhaust fans on my various printers. In this case, I have designed it for a low-cost 120x120x25mm inline fan.

The inside headers are designed to work with my quick-connect exhaust and other components so you can build out the system however you choose.

Printing

Functional designs (such as this one) generally require more strength than non-functional designs and more strength than the typical default slicer settings provide, so please review your slicer settings carefully.

This product was designed for a 0.4mm nozzle, a 0.2mm layer height and the following settings:

  • Wall Line Count = 4 ( 4 x 0.4mm = 1.6mm walls )
  • Top and Bottom Layer Count = 5 ( 5 x 0.2mm = 1.0mm top and bottom )
  • Infill = 40%, Cubic
  • Ironing = OFF (not needed)
  • Wall Generator: Arachne (If you are using Cura this is automatically enabled by default)
  • Detect Thin Walls = Not needed but good to keep ON
  • Support = NO, all required support is designed into this product
  • Brim = NO
  • MATERIAL: ASA or PETG recommended
  • PRINT ORIENTATION: As per the STL files

Assembly Notes

Please refer to my video for assembly instructions and other notes.

Where to Get My STL Files

Thangs.com

I am now posting all of my new designs on Thangs.com and plan to continue to do so for the foreseeable future. Some of my older designs may not have been migrated over yet so if they are not available on Thangs.com please check on Thingiverse.

Use, Licensing, Comments and Feedback

My primary distribution site for my design files is Thangs.com. Thangs.com is, in my opinion, leading the way in promoting designers and competition amongst designers which in turn fuels the growth of high-quality 3d printable designs for the benefit of our entire community. However, as a result, some of my designs are only available for free for 1 week from when first posted, so please download them when you see a new file available that you are interested in. Also, please like and save to help me with the competitions.

I do not permit the use of my designs for commercial purposes (i.e. you can not sell my design(s) or products printed from my design(s)) without first acquiring a commercial license from me. On Thangs.com I offer membership accounts for access to all my design files as well as a membership for commercial licensing which allows subscribers to sell printed products using my designs.

I welcome comments and feedback as we as requests for customization of designs. I will do my best to accommodate those requests.

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