Using the CSL with a fireplace
Fireplace chimneys produce less creosote but they are often harder to clean.
Due to a high air flow draft, open fireplaces produce less creosote than a woodstove. Still, it needs your attention over time. Therefore, use CSL to render creosote more brittle for easier mechanical cleaning, as well as to lower volatile organic compounds in your chimney.
A small fireplace has a horizontal opening that is less than three feet.
A large fireplace has a horizontal opening that is wider than three feet.
For large fireplaces or when using 2 CSL at the same time:
Regular chimney inspections are always recommended. The CSL will not tell you if your chimney is blocked or has any kind of structural damage. The CSL does not take the place of inspection and professional cleaning.
