This one is tricky because both the VAV and the Mixing box could be the answer, but by the book, the mixing box is the definition described in the question.
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
0186cce
3 months, 2 weeks agoea8080c
5 months, 3 weeks ago