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FAQs

Answers to your common questions about CPAP devices and tips for getting better sleep every night.

A CPAP machine is a device that delivers Continuous Positive Air Pressure through a hose to a nasal/face mask to help treat obstructive sleep apnea. A CPAP machine creates positive air pressure in a user's airway that prevents the airway from closing or collapsing which causes an apnea event. CPAP has become a generic term to refer to both CPAPs, APAPs, BiPAPs and other breathing devices. APAPs (Automatic Positive Air Pressure) adjust the force of the air pressure within a specified range to adjust to user needs. Most users find APAPs easier and more comfortable to use than CPAPs.

A BiPAP (Bilevel Positive Airway Pressure) machine delivers two different pressure levels — a higher pressure on inhale and a lower pressure on exhale — making it easier to breathe out compared to a standard CPAP. It's often prescribed for people who need more support than a CPAP provides, including those with certain lung or neuromuscular conditions.

CPAP machines typically range from $500 to $1,000 for a standard base model, with more advanced auto-adjusting (APAP) machines and travel-sized units running higher. Many insurance plans, including Medicare, cover some or all of the cost when the device is prescribed for diagnosed sleep apnea.

Wipe down your mask and empty the water chamber daily, and wash the mask cushion, tubing, and humidifier chamber in warm, soapy water at least once a week. Let all parts air dry fully before reassembling, and avoid harsh chemicals or scented soaps that can damage the silicone.

Getting a CPAP machine typically starts with a sleep study, either in a lab or at home, that confirms a diagnosis of sleep apnea. Once your doctor writes a prescription, you can order a machine through a supplier like The CPAP Shop, and we'll help you find the right fit for your needs and insurance coverage.

Most CPAP machines last around 3 to 5 years with regular use and proper maintenance, though some units continue performing well beyond that. Manufacturers generally recommend replacing the device every 5 years to ensure accurate pressure delivery and to take advantage of newer features.

Yes, purified or distilled water is actually the recommended choice for your CPAP humidifier, since it's free of the minerals found in tap water that can cause mineral buildup and damage the water chamber over time. Avoid tap, well, or spring water, as these can also introduce bacteria.