Flow of cooled air - older-style ductwork

Air Conditioning and Heat Pumps · Heat Pumps in Practice · printed page 229 (PDF page 230)

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Text in the illustration

return grille
- hot air builds up on upper level
- uneven air temperature
- no upper level returns
- minimal air circulation
air flow
supply register
return ducts
supply ducts
furnace and A/C
cross section

Generated explanation

A house cross section shows a basement furnace and air-conditioning unit connected to supply registers on two occupied levels and a single lower-level return grille. Supply ducts run beneath the lower floor and rise along the exterior wall to the upper-level register. Arrows show cooled air entering both levels, with upper-level air moving toward the stair opening and descending toward the lower-level return. The annotations identify the absence of upper-level returns, hot-air buildup upstairs, uneven temperatures, and minimal air circulation as problems with this older-style duct arrangement.

Components

furnace and air-conditioning unit supply ducts return ducts supply registers return grille stairway floor assemblies

Defects shown

No upper-level return-air openings Hot air buildup on upper level Uneven air temperature Minimal air circulation

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