HHZ Respiratory Review

ResMed AirFit F40 review: specs and price

3 min read By HHZ Editorial Next review

The ResMed AirFit F40 is a minimal full-face mask that seals under the nose and around the mouth, rated 4–30 cmH2O. With its QuietAir vent ring ResMed lists 20 dBA sound power, tied with the AirTouch F30i for the lowest of the full-face masks we've compared. It uses magnetic clips, so ResMed's implant warnings apply. It cost $163 on ResMed's eShop on 13 October 2026, between the F20 ($155) and F30i ($167). This review is based on ResMed's user guide, 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.

Key specs

SpecAirFit F40Source
Price (ResMed eShop)$163ResMed eShop
TypeMinimal full face, under the noseF40 user guide
Pressure range4–30 cmH2OUser guide
Sound with QuietAir vent ring20 dBA power / 13 dBA pressureUser guide
Sound with multi-hole vent ring34 dBA power / 26 dBA pressureUser guide
Resistance at 50 / 100 L/min0.4 / 1.7 cmH2OUser guide
Anti-asphyxia valveYesUser guide
Cushion sizesSmall wide, medium, largeUser guide
Headgear sizesSmall, standard, largeUser guide
MagnetsYes; under 400 mT at the surface, under 0.5 mT at 2 inUser guide
Device mask settingPillowsUser guide
MRIMR unsafe; keep outside MRI scanner roomsUser guide
Patient weightOver 66 lbUser guide

F40 vs F20 vs F30i

AirFit F40AirFit F20AirFit F30i
Price (eShop, 13 Oct 2026)$163$155$167
DesignUnder-nose full faceTraditional full faceUnder-nose full face, tube on top
Pressure range4–30 cmH2O3–40 cmH2O4–30 cmH2O
Sound power / pressure20 / 13 dBA (QuietAir)30 / 23 dBA25 / 18 dBA
MagnetsYesYesYes

Magnet warning

ResMed says masks with magnetic parts are contraindicated where the user, or anyone in close contact during use, has active implants that interact with magnets (such as pacemakers or implantable defibrillators) or metallic implants such as aneurysm clips, embolic coils, stents, some hearing implants, ocular implants or metal splinters in the eye. Ask your doctor if any apply. Nasal options without magnets include the AirFit N30 and P10.

Verdict

From the documents, the F40 ties with the AirTouch F30i as ResMed’s quietest full-face option on paper when fitted with the QuietAir vent ring, with a minimal under-nose design and a mid-range price. Choose the F20 instead if you need pressures above 30 cmH2O, or the F30i if you want the tube on top of your head.

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

See also: Evora Full vs AirFit F40.

Frequently asked questions

What kind of mask is the AirFit F40?
A minimal full-face mask: the cushion sits under the nose and covers the mouth, held by headgear with magnetic clips, per ResMed's U.S. user guide.
What pressure range does the AirFit F40 support?
4 to 30 cmH2O, per ResMed's user guide.
How quiet is the AirFit F40?
With the QuietAir vent ring, ResMed lists 20 dBA sound power and 13 dBA sound pressure at 1 m. With the multi-hole vent ring it's 34 and 26 dBA. We didn't measure it.
Why does the F40 guide say to select 'Pillows'?
ResMed's F40 guide tells you to make sure 'Pillows' is selected in the mask setting of AirSense, AirCurve and S9 devices, even though the F40 is a full-face mask. Follow the guide, or ask your provider.
How much does the AirFit F40 cost?
The complete mask system was $163 on ResMed's eShop on 13 October 2026.

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