I have a 25 pdvc eng. From stove 45 then 6 feet straight pipe out the wall I use 3 extra feet to keep the black off the house. I would like to know what happens when you restrict the air flow on the oak from the outside using tape? I am wondering if it can increase temp from stove. My settings are 4-4-1 on heat 1. I blocked half of it and the stove is running a blowing temp ( using a meat therm. Hanging in front of it) of around 250 I also just put a new dayton top auger motor on it and used the leaf blower clean along with a complete inside cleaning. This stove has never been this hot on this setting. I am using awf pellets. It is a 2004 mod. Just wondering why the heat increase. Or is this how it should be I bought it used so I don't know how it should burn other than what I have learned on here.