Ceramic Chimney Heat Insulation Liners from Canada
Fired ceramic liners for chimneys engineered to provide heat insulation, preventing heat loss and protecting surrounding structures. Classified in HTS 6905.90.0010 as other ceramic constructional goods with heat insulating features, meeting fired ceramic criteria in Chapter 69.
Duty Rate — Canada → United States
13.2%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide lab reports confirming low thermal conductivity for insulation claims; ensure documentation distinguishes from refractory bricks in 6902; check for chimney-specific construction use