Why is there no fresh air in the hotel room?

The air conditioning system of fan-coil plus independent fresh air is basically used as the terminal form of hotel rooms with central air conditioning.

Fan coil unit is circulating air, which has no effect on indoor pressure difference.

The hotel room has a bathroom, the bathroom has an exhaust fan, and the room has air supply and exhaust, so there will be no imbalance in air volume.

In addition, even if the exhaust fan in the bathroom is not turned on, the design fresh air volume of each standard room in the hotel is only tens of meters. /h, this kind of air volume is very small, and the infiltration through doors and windows can also meet the indoor air volume balance.

In the actual use of individual hotel rooms, it is found that the air inside is not very good, not because the air is fresh, but mainly because the ventilation effect of the room bathroom is too poor.