BiPAP machines, also called bi-level CPAPs, adjust therapy pressure when you inhale or exhale. Traditional CPAP machines provide therapy at a set pressure, but that isn't ideal for everyone. BiPAP devices change pressure based on a set interval or can automatically detect when to adjust based on your breathing pattern. Used in both medical environments and at home, BiPAP machines can be a more comfortable option for some. We recommend talking with your doctor to determine which type of therapy (CPAP, APAP, or BiPAP) is best for you. If BiPAP is recommended, we have a great selection of BiPAP machines for sale, all with free shipping.