Looooooong burn times?

[Renovation]

My local blaze king dealer indicated to me that an 8 x 12 clay chimney is too large for the BKKing. the 8x12 is actually 6 x 10 ID; which equals 60 square inches of chimney.

The BKK calls for an 8" round chimney - which is 50.24 square inches.
I am guessing that an 8 x12 may work if your chimney runs through the house; but it's not likely to work if it is an outside chimney.

Also, you can't put an 8" round liner down an 8 x 12 chimney. The dealer said that it is possible to remove the clay liner in order to get the 8" round in. Probably would be quite expensive to do this though!

I was thinking the same thing, not necessarily because of cross sectional area alone, but that area combined with poor insulation. The King's exhaust runs cool, and needs a well insulated chimney to draw well.

Barring 8", the Princess or a Woodstock sound best for long efficient burns. I've never put cast iron as a high priority, so I don't know what the best cats are with that restriction.