[open_erv2]

Look up the price of a blauberg Vento or a Lunos e2. They are ~$1800 CAD, and they get a fraction of the airflow. Computers have a large ecosystem behind them and have been in development for a very long time. This is still at the start of the deployment curve.

[4gotunameagain]

This has not answered my question. I can also come up with many examples of things that are expensive.

What does really inflate the BOM ?

And this is in no way to discount your effort or your results, I'm genuinely curious.

[open_erv2]

I have a spreadsheet where I track all inputs, and unfortunately it's just the cost of everything. The filament really doesn't help, but it also takes a lot of labor, and paying off the dev cost is also an important factor. Most of all, it's made in Canada where rent is expensive and I have pay that so I have to get paid a living Canadian wage.

[4gotunameagain]

I guess it is the cost of the exported externalities we are used to in western civilisation.

And imagine how higher the cost would be if everyone involved in the chain was paid a living wage, from mining to processing to logistics to to to..