Intro - Good to know

PLA and PETG were known to be relatively safe to inhale as it is not known to be toxic. However, heating materials to higher temperatures produces ultrafine particles (particulate matter emissions) and volatile organic compounds, which are known to be harmful.

If you, your family and your pets are constantly breathing in these concentrations, is not ideal for long-term health.

This includes all other plastics, such as ABS, Nylon, TPU and Polycarbonates, to name just a few.

There is also a study that looked at particulate matter emissions from 3D printers.

All in all, a filter should be used for every print, that captures and neutralizes fine dust and toxic fumes.

…

For this reason, I designed an additional HEPA filter holder for our beloved Bambu Lab printers, which works constantly, is large enough to eliminate odors quickly. Everyone knows the typical ABS smell, if not from printing, then from the smell of burning plastic.

This filter attachment neutralizes this smell and stops many times more fine dust.

The filter can't be seen in the device's path and the printer with the filter is 12 cm away from the wall.
An evil that I am willing to accept for my health.

I opted for the PUREBURG 3in1 filter (US, Aussie and Europe → search for “pureburg TT-AP001” @amazon).

With its large surface area, it absorbs the finest particles and removes odors.

The selection is based on the compact design (shallow depth, just the 12cm to the wall), the price (€12.50 per unit) and the reviews.

As the filter is originally offered for extractor hoods, it will be available to us for a long time.

The durability of the extractor hood is described as 3-6 months. Due to the much lower performance of the housing fan,

it should last at least 6-12 months.
I've been using it since the beginning of November'23 and don't want to keep it from you any longer. I am already impressed by the odour reduction. The effect is significantly greater than with Bambu's own active carbon filter alone.

The holder is held securely with four neodymium magnets (12x2mm, e.g. available from Amazon, AliExpress or Hornbach) on the metal back of your printer and contains a TPU seal. I have a very soft version with Shore 65A used. However, it should also work with 85A-95A and adjusted infill settings.

I used Interbond superglue with activator to attach the magnets and gasket to the base plate.
(The activator also smells very unhealthy and should be used under good ventilation!!!!)

To ensure that the holder is always perfectly aligned, I created a "contact cross", which also serves as an AMS cable disconnector at the same time. The 6-pin connector is still so tight that it does not fall out when printing (if you don't want that simply cut it off in the slicer or after printing. In addition, you only need this small, handy 5min tool, to loosen the PTFE tube and service your AMS. Yeahi!

Installation:

1. place the filter unit on a smooth surface and press the conical cylinder into the Pureburg filter unit until the conical tip can no longer be inserted any further.

(perhaps remove the 6-pin plug of the AMS on the printer beforehand).

2. now press the filter onto the already aligned holder on your printer, done!

With the toxic filaments, I always switch on the housing fan at the end and let it run on and only remove the component
out of the build chamber later, unless I'm printing overnight (I think it's obvious not to run the case fan during an ABS print!).

Here's to a long life!

Keep it simple!