A CPAP machine typically lasts about 5 years, which is the replacement timeline most manufacturers and insurance providers recommend. Some well-maintained models continue working for a decade or longer, but the machine itself is only part of the equation. Masks, tubing, filters, and humidifier chambers all wear out on much shorter cycles, and keeping up with those replacements affects both your therapy and the machine’s overall longevity.
What Determines How Long Your Machine Lasts
The 5-year average assumes nightly use at moderate pressure settings. Machines running at higher pressure levels work the blower motor harder, which accelerates wear. If you use your CPAP every night for 7 to 8 hours, you’re putting roughly 2,500 to 3,000 hours on the motor each year. That adds up to around 12,500 to 15,000 hours over five years of consistent use.
The type of water you use in the humidifier also matters more than most people realize. Tap water and most bottled water contain dissolved minerals that deposit inside the humidifier chamber over time. These mineral deposits reduce heating efficiency, force the machine to work harder to maintain humidity, and can eventually damage components. Boiling tap water kills bacteria but does nothing to remove minerals. Distilled water is the only type that prevents this buildup entirely, and using it daily is one of the simplest ways to protect your investment.
Environmental factors play a role too. Dust, pet hair, and humidity in your bedroom all pass through the machine’s intake filters. If those filters aren’t cleaned or replaced on schedule, debris reaches the internal components and shortens their useful life.
When to Replace Parts and Accessories
Your CPAP’s accessories wear out far faster than the machine itself, and using degraded parts reduces the effectiveness of your therapy. Here’s the general replacement schedule that manufacturers recommend:
- Nasal cushions or pillows: Every 2 weeks. These sit directly against your skin and lose their seal quickly as the silicone softens from facial oils and nightly compression.
- Full-face mask cushion: Every month. The larger surface area means slightly slower degradation, but a worn cushion causes air leaks that compromise pressure delivery.
- Disposable paper filters: Every month. These trap fine particles before they reach the motor.
- Reusable foam filters: Clean weekly, replace every 3 to 6 months. Washing extends their life, but the foam eventually breaks down.
- In-line bacterial filters: Every month, if your setup includes one.
- Humidifier water chamber: Every 6 months. Even with distilled water, the plastic degrades and develops micro-scratches that harbor bacteria.
These timelines assume nightly use. If you travel with a separate machine or only use CPAP intermittently, your accessories will last somewhat longer. But if you notice visible discoloration, stiffness, or a decline in seal quality, replace the part regardless of the calendar.
Signs Your CPAP Is Failing
A CPAP machine rarely dies all at once. It usually gives you warning signs over weeks or months. The most common red flag is noise. As the blower motor ages, it develops whining or wheezing sounds that follow your breathing cycle. A new CPAP is nearly silent, so any noticeable change in sound level is worth paying attention to.
You may also notice the airflow feeling weaker than it used to, even though your prescribed pressure hasn’t changed. This suggests the motor can no longer maintain consistent output. Another subtle sign is a change in humidification: the machine stops using distilled water at its normal rate, and the air feels cooler and drier. This means the heating element or humidifier chamber is degrading.
Some machines will display a direct alert on screen, something like “Motor life exceeded, contact care provider.” That message means the blower motor has hit its expected end of life, and the machine should be replaced rather than repaired. If you’re waking up with a dry mouth, experiencing more apnea events, or feeling less rested than usual despite consistent use, a failing machine could be the cause.
How Insurance and Medicare Handle Replacement
Most private insurance plans follow the manufacturer’s 5-year guideline and will cover a replacement machine on that schedule, though your specific plan’s terms may vary. Medicare uses a rental model: it pays a supplier to rent you a CPAP machine for 13 continuous months of use, after which you own the device outright. If you already owned a CPAP before enrolling in Medicare, you may still qualify for a rental or replacement machine if you meet certain criteria.
Insurance typically covers replacement accessories on shorter cycles that roughly align with the manufacturer recommendations listed above. Keep your receipts and replacement records, because insurers sometimes require documentation that you’ve been using and maintaining the machine consistently before approving a new one.
Getting the Most Out of Your Machine
A few habits can push your CPAP well past the 5-year mark. Use distilled water every night, not just occasionally. Clean the humidifier chamber weekly with warm soapy water and let it air dry completely. Replace filters on schedule, even when they look clean to the naked eye, because the fine particles that matter most are invisible. Keep the machine on a stable surface slightly above floor level to reduce dust intake, and store it in a cool, dry area during the day.
If your machine has a data card or connects to an app, check your therapy reports periodically. A gradual increase in leak rate or apnea events, without any change to your mask or settings, can signal that the machine’s pressure delivery is slipping before you notice it physically. Catching that trend early gives you time to arrange a replacement through your provider or insurer before the machine fails completely.