Hello, Picked up a used Englander off of CL, looks wonderful & I was so excited to install it. Installation was going to be in the chimney of my kitchen, center chimney, 1800's house. Then I read that an OAK is needed (it's not on my other pellet stove). There's no where to run the OAK! The chimney is centered, kitchen in front, laundry & bedrooms behind, hallways to either side. No ash dump (1800's fireplace) for OAK to go through. Can it go up the chimney? I anticipated putting in a 3" insulated liner, not sure if another will fit, or if it's wise to put them both in the same flue - won't the OAK just suck in the exhaust then? Any advice would be welcome. Can't wait to explain to my husband what I've done now..