The present invention relates to a turbine ventilator having a fast response to the required inhalation of a subject connected to the ventilator. The turbine ventilator (1000) comprises: a first valve (3) connectable to at least one breathing orifice of the subject an inspiratory reservoir (6) having an adjustable volume said inspiratory reservoir being fluidically connectable to said first valve a turbine unit (1) fluidically connectable to the inspiratory reservoir said turbine unit being fluidically connectable via said first valve to the at least one breathing orifice of the subject and a control unit (9) configured to control said first valve for controlling a flow or pressure from the inspiratory reservoir and/or turbine unit to the subject based on setpoints.
