Very few people really understand secondary air. If it's not used properly, all people are doing is injecting air conditioning into a firebox that they are trying to keep as hot as possible. VIDEOS BELOW
FYRO Stove Video
https://www.youtube.com/watch?v=1maX3o4174k&t=941s
Secondary Air Video 1
https://www.youtube.com/watch?v=Jf1xhMmpsFA
Secondary Air Video 2
https://www.youtube.com/watch?v=20hqdrSV3-s