Setting up a ResMed CPAP machine takes about 10 minutes, and nightly use becomes routine once you understand the basics: connect the components, fill the humidifier, put on your mask, and press start. Here’s everything you need to know, from first-time assembly to daily cleaning and comfort adjustments.
Initial Setup and Assembly
Start by plugging the power cord into the back of the device and connecting it to a wall outlet. Your machine will power on and display a welcome screen that walks you through basic configuration.
Next, attach the air tubing. Hold the cuff at the end of the tube and line it up with the connector port on the back of the machine. There’s a small pin on the cuff that matches a slot on the port. Push until you hear and feel it click. Connect the other end of the tubing to your mask the same way.
For the humidifier, open the lid of the water chamber and fill it with distilled water up to the maximum fill line (about 380 mL). Don’t use hot water. Close the lid, then slide the chamber into the side of the machine until it locks. The AirSense 11’s cleanable tub can use regular drinking-quality water, but the standard tub requires distilled water, so check which version you have.
Using It Each Night
Put your mask on and adjust the headgear so it’s snug but not tight. Lie down in your sleeping position before doing any final tightening, since your face shape changes when you’re on a pillow. Turn the machine on by pressing the start button, or simply breathe into the mask if your device has auto-start enabled. Air will begin flowing at your prescribed pressure.
When you wake up, remove the mask and the machine will stop automatically (or press the button to stop it manually). Empty any remaining water from the humidifier chamber and leave the lid open so it can dry.
Adjusting Comfort Settings
Two settings make the biggest difference in how comfortable therapy feels, especially in the first few weeks.
Ramp time gradually increases the air pressure from a low starting point up to your prescribed level over 30 to 45 minutes. This makes it easier to fall asleep because you’re not hit with full pressure the moment you turn the machine on. You can adjust the ramp duration through the settings menu on the device screen.
Expiratory pressure relief (EPR) slightly reduces the air pressure each time you breathe out. Many people find it uncomfortable to exhale against a constant stream of pressurized air, and EPR solves that. You can set it from 0 (off) to 3 (maximum relief) using the device’s digital display. Start at 2 or 3 if breathing out feels like a struggle, then adjust from there. Some people prefer to use EPR only during the ramp period, while others keep it on all night.
Tracking Your Progress With myAir
ResMed’s myAir app gives you a daily sleep score out of 100 based on four categories. Usage hours accounts for the largest chunk: you earn up to 70 points based on how long you wear the machine, with 10 points per hour. Mask seal is worth up to 20 points, rewarding minimal air leaks. Breathing events (your AHI, which counts how many times your breathing partially or fully stops per hour) adds up to 5 points for low numbers. Finally, the app tracks how many times you removed your mask overnight, with fewer removals earning up to 5 points.
The machine transmits data automatically, so your score is typically available in the app by morning. Your sleep specialist can also access this data remotely, which means they can adjust your prescription or troubleshoot problems without requiring an office visit.
Cleaning Your Equipment
Keeping your CPAP clean prevents bacteria buildup and keeps the machine performing well. Here’s the schedule that matters:
- After each use: Wipe down your mask cushion with a damp cloth. Empty and rinse the humidifier chamber every morning.
- Every two days: Clean the full mask (frame and cushion) with warm water and a mild, fragrance-free dish soap.
- Weekly: Submerge the tubing, mask, headgear straps, and humidifier tank in warm soapy water or a solution of one part distilled white vinegar to three parts warm water. Use a long, narrow brush to clean inside the hose and water tank. Rinse everything with clean water, pat dry with a towel, and let the components air dry completely before reassembling.
Avoid bleach, antibacterial soaps with moisturizers or strong fragrances, and dishwashers. Ozone and UV light CPAP cleaners are also not recommended. Never run vinegar through the machine itself, only through the detachable components.
When to Replace Parts
CPAP components wear out on a predictable schedule, and using worn parts leads to air leaks, reduced therapy effectiveness, and hygiene issues. Nasal pillow cushions should be replaced every two weeks. Full-face mask cushions last about a month. Disposable filters need swapping monthly. Tubing should be replaced every three months, or sooner if you notice discoloration, stiffness, or small tears.
A good habit is to inspect your cushion and filter each time you clean the rest of your equipment. If the cushion feels stiff, has visible wear marks, or your myAir score shows increasing mask leak, it’s time for a new one even if you haven’t hit the replacement window yet.
Fixing Common Problems
If you’re waking up with a dry mouth, your mouth is likely falling open during sleep and letting pressurized air escape. A full-face mask (which covers both nose and mouth) solves this for many people. If you prefer a nasal mask, adding a chin strap can keep your mouth closed. Increasing the humidifier level on your device also helps counteract dryness.
Condensation collecting inside the tubing, sometimes called “rainout,” happens when warm humidified air cools as it travels through the hose. If your ResMed machine has a heated tube (called ClimateLineAir), increasing the tube temperature setting reduces condensation. You can also try running the tubing under your blanket to keep it warm, or lowering the humidifier setting slightly.
Mask leaks are the most common frustration. Before tightening the straps further, try loosening them first. Over-tightening distorts the cushion shape and actually creates more leaks. Reposition the mask so it sits evenly on your face, then tighten just enough to stop the air escaping. If leaks persist regardless of adjustment, the mask size or style may not be right for your face shape.