New memeber. Bought a harman 300i couple months ago cuz i bought a new house and my oil furnace took a crap. Bein screw around it it but find it very hsrd to actually get any stove top temps when that after burner kicks in sucks all flames right up. Have a 14 foot flex liner attached. Ive tried everything. Infact it sucks so hard turnd my pipe red hot. I can not find any videos or at all on a harman 300 or 300i that is informational at all not to mention the user manual sucks. First woodstove i owned deff not a new to stoves. Im only 24 years old lol and this is my only sourse of heat please tell me i did not make a mistake on buying a downdraft stove..