FAQ — Frequently Asked Questions

Breathing through the mouth or mouth leaks during sleep can increase humidifier water use. Other factors include room temperature and humidification level settings. This is normal and does not indicate a problem with your device.

Rainout happens when warm, humidified air meets tubing that is cooler than room temperature — the water vapor condenses into droplets. Solutions: lower the humidification level, raise the room temperature, use ClimateLine Air Heated Tubing, or cover the tubing with an insulating wrap.

Up to 40% of PAP users experience a stuffy, dry nose. A heated humidifier adds moisture and warmth to the therapy air — reducing those symptoms and improving comfort and long-term therapy consistency.

The CPAP should always sit at the same level as or higher than the humidifier — never below it. This prevents water from entering the machine if the tubing isn't attached correctly.

No. CPAP tubing is designed to withstand temperatures far higher than a humidifier produces. Use humidification comfortably without worrying about shortening the life of your accessories.

Wash the chamber daily with warm water and mild detergent. For mineral deposits, soak it in a vinegar-water solution (1:10) for 10 minutes once a week. Always dry it completely before reuse.

Distilled water is best as it minimizes mineral buildup. Tap water may be used occasionally, but avoid products with bleach, alcohol, chlorine, or ammonia.

Use it whenever you experience a dry or stuffy nose. Many users find humidification helpful year-round, especially in areas with air conditioning or central heating.

Yes. All ResMed devices automatically adjust to 100–240V, 50–60Hz worldwide. You only need a plug adapter for your destination country.

Yes — a CPAP is classified as medical equipment and is generally allowed as an additional carry-on. Confirm the policy with your airline before booking. Bring a doctor's letter stating you use medical equipment. Do not use the humidifier during the flight.

No. Standard X-ray scanners do not damage a CPAP or its data. Still, bring medical documentation to ease security screening.

Yes, with a suitable inverter or DC converter. Without a humidifier: a 150W+ modified-sine inverter is enough. With a humidifier: you need a 200W+ pure-sine inverter. Use a deep-cycle marine battery for longer runtime.

Highly recommended. Tell your surgeon and anesthesiologist that you use a CPAP and have a sleep apnea diagnosis. Using CPAP therapy before and after surgery can improve recovery outcomes.

Replace the cushion every 3–6 months, or sooner if the seal weakens. Wash your face before bed and clean the mask after each use with warm water and mild detergent — this significantly extends cushion life.

It's most likely an incorrect size. Avoid over-tightening the headgear — that actually breaks the seal. Try a different cushion size or consult the Resindo Medika team for a proper fitting.

A full face mask is ideal for people who breathe through the mouth during sleep, or those with mouth leaks that reduce therapy effectiveness. If you often wake with a dry mouth or throat, a full face mask may be the solution.

Yes. All ResMed full face masks have an anti-asphyxia valve that opens automatically if the PAP device loses power — letting you breathe normally.

Generally yes, since tubing connector sizes are standardized. However, confirm with your non-ResMed CPAP manufacturer first, as some advanced therapy modes may require specific mask compatibility.

Skin irritation is usually caused by headgear that's too tight, a worn-out mask, or a dirty mask. Steps: loosen the headgear as much as possible while keeping the seal; check the cushion and replace it if worn; wash the mask daily; cleanse your face with a pH-neutral cleanser before bed; avoid facial lotion where the mask contacts your skin.

AutoSet devices adjust pressure with every breath based on your airway needs that night — no fixed pressure that's too high or too low. The result: more comfortable, more effective therapy, with the patient receiving the minimum pressure needed for optimal treatment.

The device responds to early signs of obstruction — flow limitation, snoring, and apnea. Pressure is raised pre-emptively when flow limitation is detected before an apnea occurs, and lowered again once the airway opens.

AutoSet responds to hypopnea involving flow limitation or snoring — both signs of physical obstruction. Central hypopnea (caused by the nervous system) does not trigger a pressure increase.

Some ResMed plastic components use polycarbonate containing BPA — the same material used in thousands of consumer products. ResMed affirms its confidence in product safety for the intended use, and all products are approved by regulatory authorities in every country where they are sold.