HHZ Respiratory Review

ResMed AirFit F20 vs F30i: full-face masks compared

2 min read By HHZ Editorial Next review

Choose the AirFit F20 ($155) for a traditional full-face seal rated up to 40 cmH2O. Choose the F30i ($167) for a minimal under-the-nose full-face design with top-of-head tubing, rated 4–30 cmH2O and quieter on ResMed's figures (25 vs 30 dBA sound power). Both have magnetic clips, so check ResMed's implant warnings first. This comparison is based on ResMed's user guides, not hands-on testing.

How we reviewed this: HHZ didn’t test these masks hands-on. This comparison is written from ResMed’s U.S. user guides, linked below, plus prices checked on ResMed’s eShop on 13 October 2026. Mask fit is personal; we don’t report comfort impressions we haven’t measured.

Side by side

SpecAirFit F20AirFit F30iSource
Price (U.S.)$155$167ResMed eShop
TypeTraditional full faceMinimal full face, tube-upUser guides
Pressure range3–40 cmH2O4–30 cmH2OF20 guide, F30i guide
Sound power / pressure at 1 m30 / 23 dBA25 / 18 dBAUser guides
Dead space240 mLNot found in guideUser guides
MagnetsYes (lower headgear straps and frame)Yes (magnetic clips)User guides
SizesSee guideFrame S/standard/L; cushion S, M, small wide, wideUser guides
Patient weightOver 66 lbOver 66 lbUser guides

Magnet warning (both masks)

ResMed’s guides say to keep the magnets at least 2 in away from active implants or medical devices that magnets can affect, and list contraindications including aneurysm clips and metal splinters in one or both eyes. The magnetic field is under 400 mT. If you or your bed partner has a medical implant, ask your doctor before using either mask. A magnet-free option on the nasal side is the P10 or N30i.

Who should pick which

You…Better fit
Need pressure above 30 cmH2OF20
Want less mask on your face and the tube on topF30i
Want the lower published soundF30i
Have a magnet-sensitive implantNeither without your doctor’s approval
Are on a tight budgetF20

Verdict

The F20 is the cheaper, higher-pressure traditional full-face mask. The F30i is the quieter, more minimal design with tubing that runs over your head. For mouth breathers who move a lot, the F30i is worth trying first; for high pressures, the F20.

Related: best CPAP masks, CPAP dry mouth, CPAP mask leaks, CPAP aerophagia.

See also: AirFit F40 review and F30i vs AirTouch F30i vs X30i.

Frequently asked questions

What's the difference between the AirFit F20 and F30i?
The F20 is a traditional full-face mask with the cushion covering nose and mouth and the tube at the front. The F30i is a minimal full-face mask that sits under the nose, with the tube connecting on top of the head. The F20 is rated 3–40 cmH2O and the F30i 4–30 cmH2O.
Do the F20 and F30i have magnets?
Yes. Both use magnetic clips. ResMed says not to use them if you or a bed partner has an implant affected by magnets, to keep them at least 2 in away from such implants, and lists contraindications such as aneurysm clips and metal splinters in the eyes. Talk to your doctor if unsure.
Which is quieter?
On ResMed's published figures the F30i is quieter: 25 dBA sound power and 18 dBA sound pressure, versus 30 and 23 dBA for the F20. We didn't measure either.
How much do they cost?
On ResMed's eShop on 13 October 2026, the F20 was $155 and the F30i $167.
Which has more dead space?
The F20 guide lists 240 mL of dead space. We didn't find a comparable figure for the F30i in the guide we read.

AirFit F30i vs AirTouch F30i vs X30i compared

Document-based comparison of ResMed's tube-up full-face masks: AirFit F30i (silicone), AirTouch F30i Comfort and Clear (fabric) and AirFit X30i (pillows plus oral cushion): sound, resistance, magnets, sizes and U.S. prices. From ResMed's U.S. user guide.

ResMed AirFit F40 review: specs and price

Document-based review of the ResMed AirFit F40 full-face CPAP mask: under-the-nose design, 4–30 cmH2O, QuietAir vs multi-hole vent sound, magnets and implant warnings, sizes, the 'Pillows' setting and U.S. price vs F20 and F30i. Written from ResMed's user guide.

ResMed AirFit P10 vs N30i: pillows vs cradle

Document-based comparison of the ResMed AirFit P10 nasal pillows mask and the AirFit N30i/P30i: pressure ranges, sound, dead space, compatibility, magnets and U.S. prices. Written from ResMed's user guides, not hands-on testing.

ResMed AirFit N20 vs N30: nasal mask vs cradle

Document-based comparison of the ResMed AirFit N20 nasal mask and AirFit N30 nasal cradle: pressure ranges, sound with QuietAir, magnets, dead space, sizes and U.S. prices. Written from ResMed's U.S. user guides, not hands-on testing.