7322 - Radiators for central heating, not electrically heated, and parts thereof, of iron or steel; air heaters and hot air distributors (including distributors which can also distribute fresh or conditioned air), not electrically heated, incorporating a motor-driven fan or blower, and parts thereof, of iron or steel:

This HTS category, 7322, encompasses essential components for climate control systems within buildings, specifically focusing on non-electrically heated radiators and air heating/distribution units made from iron or steel. It covers radiators designed to emit heat for central heating, as well as air heaters and hot air distributors. Importantly, the latter group, the air heaters and distributors, must incorporate a motor-driven fan or blower to qualify for this classification. The scope also extends to include parts for all these listed items.

Distinguishing this category from its numerous siblings at the HTS root level is crucial. Unlike the agricultural products or live animals found in Chapters 01-05, Category 7322 deals exclusively with manufactured articles of iron or steel, specifically those serving a heating or air distribution function. Its placement within Section XV, "Base Metals and Articles of Base Metal," and specifically Chapter 73, "Articles of iron or steel," highlights its material composition and industrial origin, setting it apart from raw materials or unrelated manufactured goods.

Within Category 7322, further subdivisions clarify the specific types of items. The subcategory "Radiators and parts thereof" isolates these heat-emitting units, while "Other, including parts" (7322.90.00) serves as a catch-all for air heating and hot air distributing equipment, along with any remaining parts not specifically enumerated in the prior heading. This hierarchical structure allows for precise classification based on the precise function and form of the iron or steel heating and air distribution apparatus.