Infinity Circadian DualFlex 4D Massage Chair
HSA/FSA eligible — pay with pre-tax dollars.
Showrooms in San Jose and Pleasanton
Questions? Talk to a chair specialist · +1 669 214 8889
- 2-year warranty — manufacturer-backed coverage
- Extended factory warranty available
- Price-match promise — authorized-dealer pricing on identical chairs
Authorized dealer
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 Circadian DualFlex 4D 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 premium 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 synchronized robotic back mechanisms are the defining system, designed to coordinate massage from the neck through the glute region.
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
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- 03
- 04
- 05
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 tablet, 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.
Both current sources publish 62 to 78 inches and a 300-pound maximum.
22-inch seat depth and 18-inch hip width.
These dimensions agree across current HMC and manufacturer information; confirm comfort in your normal posture.
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.
Verify shoulder-width documentation with HMC.
Current HMC and Infinity sources disagree on shoulder width. Confirm it with HMC rather than relying on either number.
05 · Feature Index
What each feature changes in daily use.
Only verified Circadian DualFlex 4D features are included here. No airbag count, program count, or numeric wall-clearance claim is added because current authoritative sources do not publish those values consistently.
Two synchronized 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.
Airbags create wrapped compression; no unverified Circadian airbag count is claimed.
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 verified reclined depth. Upright depth is 58 inches. Zero Wall Fit slides the chair forward as it reclines, but Infinity's current Circadian page does not publish a numeric rear wall-clearance requirement, so confirm your actual placement before delivery.
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. Confirm doors, halls, turns, stairs, elevators, final-room placement, and an accessible outlet before the delivery appointment.
Rear clearance
Zero Wall Fit is verified; a specific Circadian rear-clearance number is not. Measure for the 75-inch reclined depth and ask HMC to confirm the recommended gap behind the chair for your installation.
07 · Ownership
Get the service details in writing before a 352.74-pound chair arrives.
Delivery
Current HMC estimate: 5-14 business days.
The live HMC product information lists an estimated 5-14 business-day delivery window. Carrier timing can change, so use the current checkout and order confirmation as the operational schedule.
White Glove
Available; confirm whether it is included on your order.
Current HMC surfaces do not present inclusion wording consistently for this SKU. Confirm the service shown at checkout, plus stairs, access limits, room placement, assembly scope, and packaging removal before scheduling.
Warranty
Manufacturer-backed, with a term conflict to resolve.
HMC's current product module and Infinity's current residential warranty information do not present the base term the same way. Ask HMC to confirm the written manufacturer warranty that applies to this exact chair and order, including parts, labor, frame coverage, exclusions, and service process.
Before checkout, document delivery service, access requirements, warranty terms, and the service contact for this chair.
08 · The Fit Decision
Choose it 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 a settled shoulder-width figure before purchase.
- 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 verified 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. | HMC publishes 62-76 inches and a 300-pound maximum user weight. |
| Reclined length | 75 inches deep when reclined. | HMC publishes 77.2 inches reclined length and a 2-inch wall-clearance figure. |
| Feature emphasis | Health Sensor, Harman/Kardon audio, 49-inch Flex-Track, arm rollers, and the Circadian DualFlex control stack are explicit current features. | HMC emphasizes the tandem Syner-D back feel, 32 airbags with 66 cells, calf and foot systems, 8-inch tablet control, and Zero Wall Fit. |
Specification Index
The verified record.
Identity & purchase
Massage architecture
Lower body & heat
Controls & media
Body fit
Chair dimensions
Delivery & warranty
Specification note: HMC and Infinity currently disagree on the shoulder-width figure, and their warranty summaries do not present the base term consistently. Those items are deliberately not normalized here. Confirm both with HMC before purchase.
Exact-Model Questions
Frequently asked questions.
What is the current price of the Infinity Circadian DualFlex 4D?+
The current HMC product price is $14,999.00. Use the live purchase-area price as the final checkout reference.
What are the dimensions and wall-clearance requirements for the Circadian DualFlex 4D?+
The chair is 49 x 32 x 58 inches upright and 33 x 32 x 75 inches reclined. Zero Wall Fit slides it forward during recline, but no current numeric rear-clearance requirement is published, so confirm the wall gap with HMC.
What user height and weight range is appropriate for the Circadian DualFlex 4D?+
The published optimal user-height range is 62 to 78 inches, or 5 feet 2 inches to 6 feet 6 inches, with a 300-pound maximum. Confirm shoulder, calf, foot, and seat comfort when possible.
What massage mechanism and track does the Circadian DualFlex 4D use?+
It uses DualFlex Syner-D with two synchronized robotic back mechanisms and a 49-inch Flex-Track running from the neck toward the glutes and opening during recline.
What warranty and delivery terms apply to the Circadian DualFlex 4D?+
HMC lists a 5-14 business-day delivery estimate and White Glove availability, but its current surfaces differ on inclusion. HMC and Infinity also present the warranty term differently. Confirm the written warranty, White Glove inclusion, access requirements, and delivery service for your order.
What lower-body and control features are included on the Circadian DualFlex 4D?+
It includes calf kneading and oscillation, triple foot rollers, Shiatsu arm rollers, air compression, lumbar and foot heat, an 8-inch tablet, voice and quick-access controls, MyMassage memory, Harman/Kardon audio, SootheMe sounds, wireless charging, and USB-C.
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.
Contact HMC to confirm current Circadian DualFlex 4D showroom availability before you visit. View all showroom information.
The Decision
Infinity Circadian
DualFlex 4D.
Choose it when dual-back architecture is the point: two synchronized mechanisms, a 49-inch Flex-Track, active lower-body systems, scanning, heat, and practical controls. Before checkout, verify shoulder-width documentation and the written warranty term for your order.
Infinity Circadian DualFlex 4D Massage Chair · Sold by House of Massage Chairs. Current HMC price: $14,999.00. The chair is intended for relaxation and home wellness use, not diagnosis or treatment. Confirm final price, availability, White Glove inclusion, warranty terms, shoulder-width specification, delivery access, and showroom availability at the time of purchase.