This process involves the application of chemical additives to the fire box or combustion chamber. Many different formulas have been utilized over all of which presents hazards when used.
1. Explosive Chemicals
These products attempt to se a controlled explosive to loosen and knock the creosote deposits off the flue walls. These products are not at all desirable.
2. Corrosive Chemicals
These products attempt to dissolve the creosote deposits. They include basic salt as well as sulphuric and hydrochloric acids. They are very corrosive and can do extensive damage to a heating system.
3. Oxidizing Chemicals
These products attempt to promote a ‘controlled’ chimney fire by lowering the temperature necessary to ignite the deposits. Some of the products include zinc and alkali metal nitrates. Chimney fires regardless of how they are controlled are hazardous.
4. Deposit Modification Chemicals
These products act to soften the deposits and reduce their adhesion to the flue walls. They are non-explosive, non-corrosive, non-flammable, and non-toxic. They are the best additives to use to help control the creosote problem.