A single hose air conditioner works by extracting warm air from the room, cooling it, and then returning the cooled air back into the room. However, it's important to note that these types of air conditioners can create a negative air pressure environment in the room.
The cooling process in a single hose air conditioner involves the unit drawing in air from the room through the front grille. This air is then passed over the evaporator coil, where it is cooled by the refrigerant inside the unit. Once cooled, the air is blown back into the room through the hose or exhaust vent.
While the cooled air is returned to the room, the air conditioner needs to expel the heat generated by the cooling process. This heat is expelled through the exhaust hose, which is typically vented out of a window or another opening. As the hot air is vented out, it creates a negative pressure zone within the room.
The negative air pressure occurs because the air conditioner is constantly removing warm air from the room and expelling it outside. To compensate for the air being exhausted, the room pulls in air from other sources such as cracks in windows, doors, or other openings. This results in a slight decrease in air pressure inside the room relative to the surrounding areas.
It's worth noting that the negative air pressure created by a single hose air conditioner is typically minimal and might not have a significant impact on the overall air pressure in the room. The cooling effect of the air conditioner can still provide comfort, but it may not be as efficient as a dual-hose or central air conditioning system that doesn't create negative air pressure.
If maintaining a consistent air pressure in the room is a concern, you might consider using a dual-hose portable air conditioner or a central air conditioning system, as they operate differently and do not create negative air pressure.