General Rule for ductwork adequacy

Air Conditioning and Heat Pumps · Duct System · printed page 222 (PDF page 223)

Book index entries

General Rule for Ductwork Adequacy Ducts – Adequacy for Air Conditioning Duct System Ducts – System for Air Conditioning

Text in the illustration

refrigerant lines
cross sectional area of return duct
cold air return
cross sectional area of supply duct
measure the cross sectional area of the supply and return ducts at the furnace - they should be roughly the same size
evaporator coil
supply plenum
furnace
condensate line

Generated explanation

The illustration shows a furnace with a supply plenum above it and a cold-air return duct descending alongside it. An evaporator coil is outlined inside the supply plenum, with refrigerant lines extending outward and a condensate line running down toward a floor drain. Offset cross-sectional diagrams identify the areas of the supply and return ducts at the furnace. The annotation presents a general adequacy rule that these cross-sectional areas should be roughly the same size.

Components

furnace supply plenum supply duct cold-air return duct evaporator coil refrigerant lines condensate line floor drain

Materials

sheet metal