A negative pressure respirator does not bring fresh air to the wearer through a hose. Instead, it works by creating a negative pressure inside the mask when the wearer inhales, which pulls ambient air through filters into the mask. This means the air is drawn from the surrounding environment through a filtering medium by the user's own breath, not supplied through a hose. Respirators that deliver fresh air through a hose are typically positive pressure respirators or supplied-air respirators. Therefore, the statement that a negative pressure respirator brings fresh air to you through a hose is false.
