Heating duct Synonyms

Definitions for Heating

(noun) the process of becoming warmer; a rising temperature
(noun) utility to warm a building

Synonyms for phrase

glowing passage

HD abbreviation

HD is an abbreviation for Heating Duct

What does HD stand for?

HD stands for "Heating Duct"

Definitions for Duct

(noun) a long hollow cylinder for carrying a substance (as a liquid or gas)
(noun) an enclosed conduit for a fluid
(noun) a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance