Infinity Circadian 4D DualFlex Massage Chair
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Every chair we sell is on the floor in both showrooms (3,500–4,000 sq ft each), so you can try them all in one visit. Walk-ins welcome · Hours
House of Massage Chairs · Infinity Circadian Series
Two synchronized back mechanisms, a 49-inch Flex-Track, active calf and foot systems, and controls built for repeat use. The Infinity Circadian 4D DualFlex massage chair is about coordinated coverage, not a longer feature list.
01 · In One Minute
The reason to choose it is coordination.
In brief
The Infinity Circadian DualFlex 4D is a dual-mechanism chair built around synchronized back coverage. Two robotic mechanisms work along a 49-inch Flex-Track from the neck toward the glutes. TrueFit scanning, calf and foot systems, lumbar and foot heat, air compression, an 8-inch tablet, voice control, Harman/Kardon audio, memory programs, and Zero Wall Fit complete the package. The tradeoff is scale: at 352.74 pounds and 75 inches deep when reclined, it needs deliberate room planning.
Dual back
Two coordinated robotic back mechanisms can work higher and lower at the same time.
Flex-Track
The 49-inch Flex-Track combines long coverage with a track that opens during recline for a different stretch character.
Lower body
Calf kneading and oscillation, triple foot rollers, air compression, and lumbar plus foot heat extend the experience beyond the back.
Personalization
TrueFit body scanning establishes body position; the Health Sensor supplies wellness readings used by the chair to recommend a program.
Control
An 8-inch touch tablet, quick-access panel, voice control, and MyMassage memory programs reduce the friction of repeating a preferred session.
Room planning
Zero Wall Fit slides the chair forward as it reclines, but the chair still reaches 75 inches in total reclined depth.
02 · The Working Systems
Five systems. One coordinated session.
- 01
- 02
- 03
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Fig. 01 — Syner-D Dual Back Mechanism
The Mechanism
Two back mechanisms, choreographed instead of duplicated.
The DualFlex Syner-D system uses two robotic back mechanisms in a coordinated rhythm. One can work higher while the other works lower, creating layered coverage without waiting for a single assembly to travel end to end.
- SystemDualFlex Syner-D
- Back mechanismsTwo synchronized robotic units
- Massage techniquesKneading · tapping · knocking · Shiatsu · sync · 4D Shiatsu
Why it mattersThe dual-back architecture is the clearest reason to choose the Circadian over a simpler single-mechanism design.
The Track
A long path that changes character when you recline.
The 49-inch Flex-Track carries massage from the neck toward the glute region and opens during recline. That changing geometry combines long coverage with a different stretch character.
- Track length49 inches
- CoverageNeck toward glute region
- Recline behaviorTrack opens during recline
Why it mattersThe moving track geometry is part of the Circadian's massage character and worth feeling in person.
The Warmth
Heat in two practical zones.
Heating modules warm the lower-back area and footrest while the massage systems run. This is a comfort feature, not a treatment claim.
- Lumbar heatLower-back warming zone
- Foot heatFootrest warming zone
Why it mattersWhat matters is whether the lumbar and foot zones land where you want warmth.
The Extremities
The lower body is active, not passive.
Calf kneading combines rollers, oscillation, and compression. Three rollers per foot broaden sole contact, while Shiatsu arm rollers add mechanical kneading. Infinity does not publish a current Circadian airbag count, so none is claimed here.
- CalvesKneading · oscillation · compression
- FeetTriple rollers per foot
- ArmsShiatsu arm rollers
Why it mattersJudge the feet, calves, and arms separately from the back; each has its own pressure character.
The Personalization
Scan, choose, then save what works.
TrueFit body scanning identifies user size and shape for massage positioning. Infinity says the Health Sensor reads heart rate, blood oxygen, and fatigue level to recommend a program; treat those as wellness inputs, not clinical measurements. An 8-inch touch screen tablet controller, voice control, quick access, and MyMassage memory handle adjustments.
- Body scanTrueFit hardware + software
- Display8-inch touch tablet
- Repeat sessionsMyMassage memory programs
Why it mattersGood controls are what make a deep feature set usable after the first week.
03 · The Coordinated Session
The advantage is what can happen at the same time.
The Circadian's defining idea is that two back mechanisms can work across separate areas while the track, lower-body systems, air, and heat build around them.
That does not make it right for everyone. The question is whether you value layered coverage enough to justify its size, price tier, and complexity.
- i.TrueFit scanSets the massage around your body
- ii.Dual back mechanismsCoordinate higher and lower coverage
- iii.Calf + foot systemsKeep the lower body involved
- iv.Harman/Kardon audioBluetooth sound at the headrest
- v.MyMassage memorySave manual sequences you want again
The Circadian DualFlex 4D is a wellness and relaxation product, not a medical device. Its Health Sensor readings and massage programs are not intended for diagnosis, treatment, or replacement of professional care.
04 · Fit & Personalization
A powerful chair still has to fit your body.
Published fit data is only a starting point. Shoulder contact, calf placement, foot length, and pressure preference still need a real-world check.
Plan an in-person fit check →62 to 78 inches tall; up to 300 pounds.
22-inch seat depth and 18-inch hip width.
TrueFit maps the user before the session.
Body scanning supports different users, but each person should still verify shoulder, calf, and foot placement.
Test calf pressure and foot length separately.
Calf rollers, oscillation, compression, and triple foot rollers create a distinct pressure profile worth testing.
22-inch shoulder width.
Compare it with the widest regular user, then confirm shoulder contact in the chair.
05 · Feature Index
What each Circadian DualFlex 4D feature changes in daily use.
Infinity's owner's manual lists 12 automatic programs and a 2-inch wall clearance; no airbag count is claimed here.
Two coordinated mechanisms create layered upper- and lower-back coverage.
Runs from the neck toward the glutes and opens during recline.
Maps user size and shape for more personalized massage positioning.
Uses wellness readings to recommend a program; it is not clinical monitoring.
Combines calf rollers, oscillation, and compression for active lower-leg massage.
Three rollers per foot broaden underfoot contact.
Adds mechanical kneading through the arm sections.
Adds wrapped air compression alongside the rollers.
Warms the lower-back area and footrest.
Provides the main visual interface for programs and adjustments.
Handles common changes without repeatedly reaching for the tablet.
Saves manual sequences for faster repeat sessions.
Pairs Bluetooth headrest audio with built-in nature sounds.
Keeps compatible devices powered during a session.
Slides the chair forward during recline to save rear space.
06 · In Your Home
Plan for the full reclined footprint, not the showroom silhouette.
is the reclined depth. Upright depth is 58 inches, and Zero Wall Fit needs only 2 inches behind the chair.
Overall dimensions
Upright: 49 inches high x 32 inches wide x 58 inches deep. Reclined: 33 inches high x 32 inches wide x 75 inches deep. Chair weight: 352.74 pounds.
Finishes
- Black/Black
- Brown/Dark Brown
Delivery access
At more than 350 pounds, access planning matters.
Rear clearance
Infinity's owner's manual calls for 2 inches behind the chair with Zero Wall Fit and 24 inches in front so the footrest can extend. Measure for the 75-inch reclined depth as well.
07 · Ownership
Get the service details in writing before a 352.74-pound chair arrives.
Delivery
Free US shipping.
The estimated delivery is shown above; final timing depends on destination, scheduling, and access.
White Glove
Included with this chair.
Confirm the service shown at checkout, plus stairs, access limits, room placement, assembly scope, and packaging removal before scheduling.
Warranty
Manufacturer warranty — see warranty details.
Infinity lists a 5-year U.S. residential limited warranty for this model: 5 years on the structural frame, 3 years on covered parts, and 1 year of covered labor, in-home if necessary. Ask us for the written coverage before you order. Your purchase is also covered by our 6-Month Price Protection, and you can pay with Affirm, as low as 0% APR, subject to eligibility.
Before checkout, document delivery service, access requirements, warranty terms, and the service contact for this chair.
08 · The Fit Decision
Choose the Infinity Circadian 4D DualFlex massage chair for the dual-back experience, not for a badge or a spec count.
A strong fit if you…
- Want two synchronized back mechanisms working across separate areas.
- Value a 49-inch Flex-Track with neck-to-glute coverage.
- Prioritize calf kneading, triple foot rollers, and arm rollers.
- Want tablet, voice, memory, premium audio, and charging controls.
- Fit the published 62-78 inch height and 300-pound maximum.
- Have room for 32-inch width and 75-inch reclined depth.
Consider another model if you…
- Prefer a simpler single-mechanism massage.
- Need a smaller or lighter chair.
- Fall outside the published fit guidance.
- Need more than a 22-inch shoulder width or an 18-inch hip width.
- Want a different premium tandem-back package.
Closest Alternative
The nearest alternative is the Luminary Syner-D.
Both use premium tandem-back positioning. Compare the dual-back feel, room fit, and controls rather than counting features.
| Decision point | Circadian DualFlex 4D | Luminary Syner-D |
|---|---|---|
| Back system | DualFlex Syner-D dual back mechanisms plus a 49-inch Flex-Track. | Syner-D tandem-back positioning with a different premium feature package. |
| Published fit | Optimal user height 62-78 inches; maximum user weight 300 pounds. | Optimal user height 62-76 inches; maximum user weight 300 pounds. |
| Reclined length | 75 inches deep when reclined, with a 2-inch wall clearance. | 77.2 inches long when reclined, with a 2-inch wall clearance. |
| Feature emphasis | Health Sensor, Harman/Kardon audio, 49-inch Flex-Track, arm rollers, and the Circadian DualFlex control stack are explicit current features. | The tandem Syner-D back feel, 32 airbags with 66 cells, calf and foot systems, 8-inch tablet control, and Zero Wall Fit. |
Circadian DualFlex 4D vs Sensation 4D DualFlex: both use two back mechanisms and list 62 to 78 inches with a 300 lb maximum. The Infinity Sensation 4D DualFlex lists more body room and programs, with a 21-inch hip width, a 23-inch shoulder width, and 20 automatic programs; the Circadian DualFlex 4D lists Complete Calf kneading and oscillation, triple foot rollers, and Shiatsu arm rollers.
Specification Index
Full specifications.
Identity & purchase
Massage architecture
Lower body & heat
Controls & media
Body fit
Chair dimensions
Delivery & warranty
Specification note: fit, shoulder width, and dimensions follow Infinity's Circadian 4D DualFlex product page; wall clearance and the 12 automatic programs follow Infinity's owner's manual.
Exact-Model Questions
Frequently asked questions.
Where can I buy the Infinity Circadian 4D DualFlex massage chair?+
At House of Massage Chairs, an authorized Infinity dealer. Order the Infinity Circadian DualFlex 4D online with free US shipping and white-glove delivery and setup, or buy it at our San Jose (Westfield Oakridge) or Pleasanton (Stoneridge) showroom, where walk-ins are welcome. Call or text (669) 214-8889 with questions before you order the Circadian.
Can I try the Infinity Circadian massage chair before buying?+
Yes. The Infinity Circadian DualFlex 4D is on the floor in both our San Jose (Westfield Oakridge) and Pleasanton (Stoneridge) showrooms. Each is 3,500–4,000 sq ft and carries 45+ chairs, so you can compare everything in one visit without driving to another store, and walk-ins are welcome with no appointment needed. Test the two-mechanism rhythm, calf pressure, arm rollers, and shoulder alignment.
What are the dimensions and wall-clearance requirements for the Circadian DualFlex 4D?+
32 inches wide. The Infinity Circadian DualFlex 4D measures 58 inches deep and 49 inches high upright, and 75 inches deep and 33 inches high reclined. Infinity's owner's manual calls for 2 inches of clearance behind the chair and 24 inches in front for the footrest. The chair weighs 352.74 lb, so measure doors, halls, and turns as well as the room.
What height and weight range does the Infinity Circadian DualFlex 4D fit?+
5 ft 2 in to 6 ft 6 in, with a 300 lb maximum user weight. Infinity lists a 62-to-78-inch optimal height range for the Infinity Circadian DualFlex 4D, plus a 22-inch seat depth, 18-inch hip width, and 22-inch shoulder width. Fit is personal, so confirm shoulder, calf, and foot placement in person when possible.
What massage mechanism and track does the Infinity Circadian DualFlex 4D use?+
Two Syner-D back mechanisms on a 49-inch Flex-Track. The Infinity Circadian DualFlex 4D uses the DualFlex Syner-D system, so one mechanism can work higher while the other works lower in a coordinated rhythm. The Flex-Track runs from the neck toward the glutes and opens during recline for a different stretch character.
Should I buy the Infinity Circadian DualFlex 4D or the Luminary Syner-D?+
Choose the Infinity Circadian DualFlex 4D for a taller fit window and more shoulder room: 62 to 78 inches and a 22-inch shoulder width, plus Shiatsu arm rollers and Harman/Kardon audio. Choose the Luminary Syner-D for its 32-airbag, 66-cell compression system. Both use Syner-D dual back mechanisms on a 49-inch track, with calf kneading, triple foot rollers, and a 300 lb maximum.
What is the difference between the Infinity Circadian DualFlex 4D and the Sensation 4D DualFlex?+
Lower-body hardware versus body room. The Infinity Circadian DualFlex 4D lists Complete Calf kneading and oscillation, triple foot rollers, and Shiatsu arm rollers; the Sensation uses dual sole foot rollers. The Sensation 4D DualFlex lists a 21-inch hip width, a 23-inch shoulder width, and 20 automatic programs, versus 18 inches, 22 inches, and 12 programs on the Circadian.
Is the Infinity Circadian DualFlex 4D worth it?+
Yes, if coordinated dual-back coverage is the reason you are shopping: two Syner-D mechanisms on a 49-inch Flex-Track, active calf kneading, triple foot rollers, Shiatsu arm rollers, and a 62-to-78-inch fit window. If you want a simpler single-mechanism chair or a smaller footprint than 32 by 75 inches reclined, the Celebrity Elite 4D may suit you better than the Infinity Circadian DualFlex 4D.
What warranty comes with the Infinity Circadian DualFlex 4D?+
5 years. The Infinity Circadian DualFlex 4D comes with Infinity's 5-year U.S. residential limited warranty, and House of Massage Chairs is an authorized Infinity dealer. Infinity lists 5 years on the structural frame, 3 years on covered parts, and 1 year of covered labor for this model, so ask us for the written coverage before you order. Your Circadian purchase is also covered by our 6-Month Price Protection.
Is the Infinity Circadian DualFlex 4D HSA/FSA eligible?+
Yes. The Infinity Circadian DualFlex 4D is HSA/FSA eligible with a Letter of Medical Necessity (LMN). Our HSA/FSA massage chair guide explains how buying with HSA or FSA funds works, and you can call or text (669) 214-8889 with questions before you order the Circadian.
Before You Decide
Dual mechanisms are easy to describe.Fit and rhythm still have to be felt.
Use an in-person session to judge the two-back-mechanism rhythm, shoulder alignment, calf pressure, foot length, arm-roller feel, heat placement, tablet controls, and whether the 75-inch reclined footprint works for your room.
Walk-ins are welcome, no appointment needed; the Circadian DualFlex 4D is on the floor in both showrooms, and each carries 45+ chairs. View all showroom information.
The Decision
Infinity Circadian
DualFlex 4D.
Choose this Infinity Circadian massage chair for coordinated dual-back coverage. Before checkout, measure for the 75-inch reclined depth and confirm the delivery path for a 352.74-pound chair.
Infinity Circadian DualFlex 4D Massage Chair · Sold by House of Massage Chairs, an authorized Infinity dealer. The chair is intended for relaxation and home wellness use, not diagnosis or treatment. Free US shipping with white-glove delivery and setup. Infinity 5-year U.S. residential limited warranty — see warranty details.
Compare similar chairs
Same brand or a similar price. Crossed-out prices are the brand’s MSRP.
-
Infinity
Infinity Luminary Syner-D Massage Chair
MSRP$15,999$12,999 -
Infinity
Infinity Ultra Imperial Syner-D Massage Chair
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-
Infinity
Infinity Sensation 4D DualFlex Massage Chair
$12,999
Try it before you buy. Every chair we sell is on the floor in both showrooms — San Jose (Westfield Oakridge) and Pleasanton (Stoneridge Mall). Walk-ins welcome, no appointment needed · Questions? Call or text (669) 214-8889.
Still deciding? How to choose a massage chair by budget · Massage chairs compared for comfort and fit
What showroom visitors say on Google
Google reviews of our San Jose and Pleasanton showrooms (store reviews, not reviews of this product), quoted as written.
Amazing service from Gio! Totally no rush, no pressure to make a purchase! Gio was open, and took the time and initiative to make sure we were getting the chair that best fits our needs and pricing. We glad we made this purchase!
Y. G. · Pleasanton showroom · Google review
Henry and Shawn were absolutely amazing in helping us select the chair of my dreams. They went over and above in not only helping me compare the models and benefits but to also explain the technology behind the various ones I tried. Go here and be happy with the chair you pick!
M. R. · San Jose showroom · Google review
Just had an amazing experience buying my first massage chair. Gabe was very patient and explained in detail all the different chairs available in their showroom. They have a lot of different chairs in their showroom. I highly recommend coming here if you need to buy a massage chair!
S. L. · Pleasanton showroom · Google review
My husband and I stopped in on the fly to look at a foot massager. We got the best help from Shawn. He was so patient with us in our indecisiveness. Shawn is very knowledgeable in the inventory and we willingly tried a massage chair to check the new tech of the chairs. We tried several different chairs and ended up purchasing the 'Ferrari' chair. We are so grateful for his patience, his knowledge, and his continually helping us and with all the settings. We are excited about our new purchase and we are looking forward to the benefits and relaxing moments that await. Thank you Shawn for your help and good luck to you!
S. C. · San Jose showroom · Google review
Great experience shopping for a massage chair here! The store has a wide selection of massage chairs that you can actually try, which really helped us compare the different options.
My husband and I spent about two hours trying different chairs, and Shawun was very patient and helpful throughout the entire process. He let us try all the chairs we were interested in and clearly explained the features and differences between each one. We finally found a chair that we both really liked.
We really appreciate Shawun help, as well as Michael’s assistance. Great selection and very helpful service. Highly recommended!
N. M. · Pleasanton showroom · Google review
My wife and I have been looking at Massage Chairs on line for quite some time. Everything I've read, said to go out and try several to see what is the best fit, comfort and price.
Today, we went to House of Massage Chairs and met with Henry Ipek. He showed us numerous massage chairs to find out what was the best fit for us. I think we probably tried 10 different chairs while we were in the store.
Finally, my wife and I finally agreed on one chair that we both loved. It wasn't the chair I came in for or saw on line, but it was 10X better. We spent a little more than we initially wanted to, but when you figure this is going to last us a long time, we went ahead and pulled the trigger.
Henry was wonderful dealing with and gave us a good and fair price on the massage chair.
We couldn't be more happy with our purchase and the service we got from Henry.
T. S. · San Jose showroom · Google review
We were very impressed with the selection of massage chairs and the service we received. We were able to take our time trying many different models. Shawun was knowledgeable and patient, explaining the features of each chair and helping us find one that both my wife and I liked. Michael was also very helpful. We really appreciated their friendly service and would definitely recommend this store.
S. C. · Pleasanton showroom · Google review
Henry at House of Massage Chairs provided truly exceptional service from start to finish. He spent a generous amount of time with my wife and me, helping us find the right massage chair for both of our needs. He patiently walked us through the different brands, features, and technologies, explaining each brand’s approach and how those differences translate into the actual massage experience. His knowledge and attention to detail helped us feel informed and confident in our decision.
What really set Henry apart was how far he went to help us beyond the store visit. He assisted with delivery and even helped us navigate the return of a massage chair we had recently purchased. That level of care and follow-through made a big difference to us.
Throughout the entire process, we felt that Henry genuinely cared about finding the best fit for us. If you’re considering a massage chair, I highly recommend visiting House of Massage Chairs and asking for Henry. Thank you, Henry, for your patience, expertise, and outstanding service!
B. C. · San Jose showroom · Google review
Salesman Gabe spent time with us explaining the features of each chair and the differences between chairs. No pressure sales.
D. H. · Pleasanton showroom · Google review
We had a wonderful experience here! Henry was incredibly welcoming, knowledgeable, and professional. He took the time to understand what we were looking for and quickly helped us narrow down the options based on our preferences.
The store carries a great selection of different brands and models, probably one of the most comprehensive selections we’ve seen in the Bay Area. It was really convenient to be able to try so many different chairs in one place, and we found one we loved pretty quickly.
Henry also did a great job explaining the differences between the chairs, as well as the warranty and after-sales service for each option. We really appreciated how transparent and thorough he was—it made us feel very comfortable and confident about our purchase.
Overall, it was such a pleasant and stress-free shopping experience. Great selection, great service, and very knowledgeable staff. Highly recommend Henry and this store if you’re looking for a massage chair!
C. C. · San Jose showroom · Google review
We visited the store intending to buy a chair on father's day. Gabe's exceptional patience, comprehensive knowledge of all available chairs, and friendly, non-pressuring demeanor made the experience truly enjoyable. We spent over 3 hrs trying almost every chair, so much so that we didn't realize the mall had already closed. Despite this, Gabe graciously encouraged us to take our time and not rush our decision. Ultimately, we purchased a chair that exceeded our initial budget, but its quality has proven invaluable as we use it daily. Thank you Gabe again!
C. B. · Pleasanton showroom · Google review
We had such a great experience shopping here! Henry, the owner, was incredibly helpful and professional. He quickly understood exactly what we were looking for and, with his many years of experience, recommended a massage chair that turned out to be a perfect fit for us.
What really impressed us was how accurately he explained the differences between the chairs and what we would actually feel during the massage. Once we tried the chair he recommended, everything he described was spot on. He really helped us narrow down the options and feel confident about our final decision without ever making us feel pressured.
Henry is knowledgeable, patient, and genuinely cares about finding the right chair for his customers. We’re very happy with our purchase and the entire shopping experience. Highly recommend!
J. G. · San Jose showroom · Google review
Read all reviews on Google: San JoseRead all reviews on Google: Pleasanton
Quoted as written on Google, reviewer initials only. Ratings and review counts as of Oct 2026.