Single hose portable ACs suffer from terrible efficiency inherent to their design. Here is how they work and how to improve their efficiency.
The EU has a number of 3D printer resin manufacturers that have competitive prices compared to producers from overseas. Here is a list of available resins and their prices.
To support local economies and social systems, I wanted to buy 3D printer filament made in the EU. Here’s a list of manufacturers and their filaments.