Central heating radiators (732211 and 732219) circulate hot water or steam through panels to radiate heat, and are classified by whether the iron is cast or not. Hot air distributors (732290) use a motor-driven fan or blower to force heated air through ducts and are classified separately. If the unit is electrically heated, it falls outside this heading entirely.

Yes, iron and steel articles — including radiators and air heaters — are generally subject to Section 232 tariffs. The measure applies at the tariff-line level and by country of origin, so importers should verify the specific line and any applicable exclusions or quota arrangements before entry.