Which methods are typically used for interior kitchen exhaust duct cleaning?

Which methods are typically used for interior kitchen exhaust duct cleaning?

• A. Wet washing with detergents or agitation, brushing, and sometimes high-pressure water cleaning as allowed by code.
• B. Manual scrubbing with dry brushes only.
• C. Substituting with power washing of metal.
• D. Using solvents that may damage metal.

Answer: (C)

Interior kitchen exhaust duct cleaning relies on wet cleaning methods because grease and oil coatings bond strongly to duct surfaces. Wet washing with detergents or emulsifiers helps dissolve and loosen that buildup, and agitation or brushing physically scrubs it away so it can be flushed out of the system. In many codes and standards, high‑pressure water cleaning is allowed, but only when the duct, fans, and seals are rated for it and the cleaning is performed by trained technicians following the code and manufacturer guidelines. Dry brushing alone isn’t sufficient for heavy grease; it mainly moves loose dust and won’t remove thick grease layers. Substituting with power washing of metal isn’t appropriate because high‑pressure forces can damage ductwork, joints, and coatings, and may spread contaminants rather than remove them. Similarly, using solvents that could attack or leave residues on metal is hazardous and typically prohibited. The safest, most effective approach is the wet cleaning method described, executed in compliance with applicable codes and manufacturer instructions.

Interior kitchen exhaust duct cleaning relies on wet cleaning methods because grease and oil coatings bond strongly to duct surfaces. Wet washing with detergents or emulsifiers helps dissolve and loosen that buildup, and agitation or brushing physically scrubs it away so it can be flushed out of the system. In many codes and standards, high‑pressure water cleaning is allowed, but only when the duct, fans, and seals are rated for it and the cleaning is performed by trained technicians following the code and manufacturer guidelines. Dry brushing alone isn’t sufficient for heavy grease; it mainly moves loose dust and won’t remove thick grease layers. Substituting with power washing of metal isn’t appropriate because high‑pressure forces can damage ductwork, joints, and coatings, and may spread contaminants rather than remove them. Similarly, using solvents that could attack or leave residues on metal is hazardous and typically prohibited. The safest, most effective approach is the wet cleaning method described, executed in compliance with applicable codes and manufacturer instructions.