Portable Air Conditioner - Single vs Dual Hose

Portable air conditioners are available in a single hose or dual hose design. This article explains the difference in the function of these designs.

Understanding the Difference between a Single or Dual Hose Portable Air Conditioner

Portable air conditioners with a single hose pull air from within the room only and expel warmed air and moisture outside. This creates a negative air pressure since you are pushing air out of the room. The result is air has to be replaced in the room and is consequently sucked in from cracks beneath doors or around windows. This warm air forces the appliance to work harder to keep the room cool. Single hose models are simple machines designed for smaller rooms.

Portable air conditioners with dual hoses feature one air intake hose and one air out-take hose. These models take all their make up air from the outside so there should not be any negative pressure generated. The air intake pulls air from the room, cools it, and then returns it back into the room. This process heats up the appliance, so another intake hose takes air from outside to cool the appliance down. The second hose expels all warm air back outside. Dual hose systems are more efficient in larger settings.

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