A ventilation system for a room comprising: - a hood for domestic use located in said room and having first control means; - a wall fan located in said room and having second control means; characterized by comprising: - a plurality of transducers configured to detect a respective plurality of characteristic parameters of the gases in said room; - processing and control means electrically connected with said plurality of transducers and in signal communication with said first control means, said processing and control means comprising firmware configured to process said characteristic parameters detected by one or more of said plurality of transducers and to transmit a first control signal to control said filter hood; and in that: - said hood for domestic use is in signal communication with said wall fan via a first transmitter module, located in said hood, and configured to transmit a second signal, said wall fan comprising a first receiver module, located in said wall fan, and configured to receive said second signal; - said second signal being generated by said hood according to said first signal to instruct said second control means to turn on said wall fan and keep it in this state for a first predetermined ON-time when one or more of said characteristic parameters detected by said plurality of sensors exceed respective predetermined threshold values. - a hood for domestic use located in said room and having first control means; - a wall fan located in said room and having second control means; - a plurality of transducers configured to detect a respective plurality of characteristic parameters of the gases in said room; - processing and control means electrically connected with said plurality of transducers and in signal communication with said first control means, said processing and control means comprising firmware configured to process said characteristic parameters detected by one or more of said plurality of transducers and to transmit a first control signal to control said filter hood; and in that: - said hood for domestic use is in signal communication with said wall fan via a first transmitter module, located in said hood, and configured to transmit a second signal, said wall fan comprising a first receiver module, located in said wall fan, and configured to receive said second signal; - said second signal being generated by said hood according to said first signal to instruct said second control means to turn on said wall fan and keep it in this state for a first predetermined ON-time when one or more of said characteristic parameters detected by said plurality of sensors exceed respective predetermined threshold values. - said hood for domestic use is in signal communication with said wall fan via a first transmitter module, located in said hood, and configured to transmit a second signal, said wall fan comprising a first receiver module, located in said wall fan, and configured to receive said second signal; - said second signal being generated by said hood according to said first signal to instruct said second control means to turn on said wall fan and keep it in this state for a first predetermined ON-time when one or more of said characteristic parameters detected by said plurality of sensors exceed respective predetermined threshold values.