creosol in prefab fireplace ?

[jeff123]

I have a pre fab metal fireplace installed in my home with 10” double wall galvanized flu going up 1 story. Over the last 15 years I have burned about 10 cords of seasoned hardwood. Each year I examine the flue from top and bottom and there doesn’t appear to be any buildup of creosol. Is the reason for lack of creosol the metal flu ? I do burn it hot on occasion, could that be burning the creosol off ? The only buildup I see is a dusty thin coat of ash.
Thx

 

[Backwoods Savage]

Sounds like you are doing things okay Jeff.

 

[thechimneysweep]

Creosote is formed when wood exhaust cools and condenses in the flue. Your manufactured fireplace sends so much of the heat from the fire up your short chimney that cooling (and creosote condensation) isn't likely to occur.