Dual Hose Portable Air Conditioner View Models >>
Dual hose portable air conditioners function similar to single hose units, but dual hose portable air conditioners have implemented a system to correct some of the inefficiency inherent in a single hose portable air conditioner's design.
A single hose portable air conditioner uses a compressor to power a cooling system to remove heat from the room's air. This heat is then expelled out the exhaust hose. However, the compressor itself creates heat and must be cooled off - and air must be passed over the condenser coil to remove heat from the room. Since a single hose portable air conditioner's only source of air is the room that it is in, air from the room is used to cool off the compressor. This air is then expelled out the exhaust hose.
This system is inefficient for two reasons:
- Already-cooled air from the room is being heated up and expelled from the room. This is wasteful, as the portable air conditioner had to expend energy to cool this air.
- As air from the room is expelled, other air must take its place in the room. This is what is called "Negative air pressure." Air then seeps in around doorways, and through small cracks and holes in the ceiling, floor, and walls. This air must then be cooled - and it may also bring allergens and impurities with it into the room.
A dual hose portable air conditioner solves this problem by adding an extra hose, which pulls air into the portable air conditioner from the outside to cool off the compressor and condenser coil. The air is then expelled out the exhaust hose.
Operationally, a dual hose portable air conditioner has two main advantages over a single hose unit. A dual hose portable air conditioner will cool a room faster and it will not create a negative air pressure situation in the room. Of course, if you have a dual hose portable air conditioner, you can remove the intake hose and it will function like a single hose unit.
For another explanation of the differences between single and dual hose portable air conditioners, see the graphic below: