A team from the Indian Institutes of Technology (IIT)-Bombay, NIT Srinagar and Islamic University of Science & Technology (IUST), Awantipora, Pulwama, Jammu and Kashmir has developed "Ruhdaar," a low-cost ventilator using locally available materials. This invention will solve the problem of the ventilator, which is the primary requirement to treat COVID-19 patients, as the high-end ventilators used in hospitals cost in lakhs of rupees. Ruhdaar: Ruhdaar provides necessary functionalities that can provide adequate breathing support necessary to save the life of a critically ill COVID-19 patient. The prototype cost around Rs.10,000, which can get reduced during mass production. The ventilator can be used to control the basic parameters such as tidal volume, Breaths per Minute, and Inspiratory: Expiratory Ratio. It can also monitor pressure continuously during its operation