Chimney liner question 5.5 or 6

[latitude45]

I have a used Lopi Freedom insert I would like to install in my basement fireplace. My chimney is 35ft clay tile/brick. The manual says the max chimney height is 35ft. I was wondering if I should go with a smaller 5.5" liner due to potential overdraft or stick with the 6". Thanks

 

[begreen]

Yes, I would go with the 5.5".