165 / | HD | HEAT EXCHANGE |
DIG 327 | DD | THERMOSYPHONIC HAVING VERTICAL AIR DRAFT PASSAGE {3} |
DIG 337 | .~ Heating or cooling means entirely surrounded by air draft passage forming casing {3} | |
DIG 338 | DD | .~.~> Nested or concentric members define annular air draft passage and heating or cooling conduit {1} |
DIG 340 | DD | .~.~> Including flow baffle in casing |
DIG 341 | DD | .~.~> Parallel heating or cooling tubes or tubular sections (e.g., coil, serpentine, etc.) |