Happy New year to you all.
Firstly, I dont' live in the USA.
Secondly, I am just interested as a hobby, so please surpress the need to flame me.
I was wondering what are the standard duct sizings (square) for air con.
What I want to do is simply have some ducts go through the windows, with fans, filters and UVC. Would be nice to have clean air in my tiny apartment.
Chris