The atmospheric pressure in the negative pressure ambulance is lower than the atmospheric pressure outside the vehicle, while the air can only flow from outside into the medical compartment and never leak the  outside the ambulance. The negative pressure system is connected with filtration and disinfection device which can avoid the secondary infection.

It is a core design that the medical compartment and the driver’s cab are completely isolated. The air-conditioner system is independently control and seperately circulate between the medical compartment and driver’s cab. The Negative pressure ambulance is just as a mobile isolation ward serving the patients