A BiPAP machine, also known as a bilevel positive airway pressure machine, is a type of noninvasive ventilation that helps you breathe. It delivers air through a mask on your face and is used to treat conditions where you can breathe on your own but aren’t getting enough oxygen or can’t get rid of carbon dioxide. Unlike invasive mechanical ventilation, which connects to a tube in your throat, BiPAP delivers air through a mask on your face. BiPAP machines have two air pressure settings: inspiratory positive airway pressure (IPAP) and expiratory positive airway pressure (EPAP). The machine delivers more air pressure when you breathe in (IPAP) and reduces the air pressure when you breathe out (EPAP). BiPAP machines are used to treat a variety of conditions, including chronic obstructive pulmonary disorder (COPD), obstructive sleep apnea, obesity hypoventilation syndrome, pneumonia, asthma flare-up, poor breathing after an operation, and neurological disease that disturbs breathing. They can be used in hospitals and are also available for home use. If you are buying a BiPAP machine for home use, it is recommended to talk with a professional who sells home medical equipment to help you pick the type of BiPAP machine best suited to your needs.