About this 3D model

Adjusted the airflow for some 120mm be quiet! fans and made it one part as it fits my heatbed on a prusa printer. Filter: https://amzn.to/2Te0xQD Fan: https://amzn.to/36OjNZB Remixed from demikelo on Thingiverse: https://www.thingiverse.com/thing:4076795 Update 07.02.2020: Changed the size because filters had a too tight fit and changed the mounting holes because they where too close to the housing. Bad to reach and I went away from using nuts. Print instructions No support needed, just place it with the right side on the heatbed...