BETA Air Filtering for A1/A1 mini Enclosure v0.4

BETA Air Filtering and Ventillation (exhaust fan) for A1/A1 mini Enclosure (v0.4)

THIS IS A BETA MODEL, there are some known ISSUES (addressed down below) and there is no raw model file included yet. Please read the full description carefully!

If you print with your A1/A1 mini in a room where people are regurarly breathing the air and there is no way to replace it with fresh air, it is highly recommended to use certain methods of air filtration. This is one such method, where we filter the air coming from a (separately purchased or printed) enclosure that contains the printer.

This model consists of two parts and connectors that join the two parts together. At the moment (in the case of this beta model), the two parts are held together by the filter itself. After attaching the fans to the larger part, the fan pulls the air from the enclosure through the filter and exhausts it outside.

In my setup, I've used:

• A “YOOPAI 3D Printer Enclosure For Bambu Lab A1/A1 mini” enclosure, but in theory this should work with similar enclosures (like the BIGTREETECH Panda Shelter or BIQU Panda Shelter or generally similar enclosures that have a ventillation hole)
• A Noctua 120mmx120mmx15mm PC fan, should work with any 120mmx120mm fan, the stronger the better
• Basic PC fan screws (purchased seperately)
• A “HEPA Activated Carbon Air Filter Screen for PVC Pipe” filter from Aliexpress, 70mm diameter
• A "DC12V PWM 4-Pin Type-C Fan Speed Controller" to control the fan speed and power the fan, also from Aliexpress

It is recommended to use a regular air-filtering device (such as an air purifier) in the room alongside this method.

Known issues/limitations:

• The lower side of the parts does not currently touch the ground, so it serves only for balancing purposes. As a result, the weight is supported by the filter itself. This is a high-priority issue, it would be better if the parts could support themselves. Smaller and lighter PC fans are recommended because of this.
• The connectors are not usable at the moment without cutting larger holes in the enclosure and using glue. This is a work in progress (low priority issue, since the filter itself can hold the parts together).
• This is an exhaust fan. It is highly recommended to also use an intake fan (for which I do not yet have a model, also work in progress). The recommended ambient temperature for the A1/A1 mini is 10–30°C. If you use an enclosure, monitor temperatures to keep the printer within this ambient range.
• It is only compatible with 70mm filters and 120x120mm fans