When people ask about the UNiCUBE, the questions usually start with the vibration or the far-infrared heat. Rarely does anyone ask about the wood. But the choice to build the UNiCUBE from solid natural cedar — rather than engineered wood, composite panels, or any of the cheaper materials that could have been used — is one of the most deliberate decisions in the pod's design. It affects the acoustics, the thermal environment, the air quality inside the pod, and the way the body responds to the session.
Here's why cedar was chosen, and what it contributes to the experience.
The UNiCUBE works by translating sound waves into full-body mechanical vibration through Sonic Pulse Core Technology, developed by Dida Doctor. For that vibration to be transmitted effectively throughout the pod — and felt as a coherent, enveloping resonance rather than a localised buzz — the material the pod is built from needs to behave like a resonance chamber.
Cedar is one of the few woods that does this naturally. Its low density and straight, tight grain give it an exceptionally high acoustic radiation coefficient — the ratio of sound velocity to density that determines how efficiently a material transmits and amplifies vibration [1]. This is the same property that makes cedar a preferred tonewood for acoustic guitar tops: it responds quickly to vibration, produces a warm, full resonance, and sustains that resonance evenly across a wide frequency range [2].
In the context of the UNiCUBE, this means the cedar walls, floor, and ceiling don't just contain the vibration — they participate in it. The Sonic Pulse Core generates the primary vibration signal, and the cedar structure amplifies and distributes it throughout the pod, creating a whole-body immersive experience that would not be achievable in a metal or composite enclosure.
The UNiCUBE incorporates a far-infrared heat system using graphene and ceramic heating elements. For that heat to be distributed evenly and retained efficiently, the pod's construction material needs to have low thermal conductivity — meaning it should insulate rather than conduct, keeping the warmth inside the pod rather than dissipating it through the walls.
Cedar's cellular structure contains millions of tiny air pockets that act as natural insulation [3]. This gives it thermal conductivity properties that are significantly lower than most hardwoods, and far lower than metal or stone. The practical result is that the pod heats evenly and retains warmth efficiently — and crucially, the cedar surface itself remains comfortable to the touch even as the interior temperature rises, because it does not conduct heat aggressively to the skin.
Western Red Cedar — the species used in the UNiCUBE — is particularly prized for its dimensional stability under heat. It expands and contracts very little at sauna temperatures, which means the pod maintains its structural integrity and acoustic properties session after session, without the warping, cracking, or off-gassing that can occur with engineered wood products under repeated thermal cycling [4].
This is the property most people don't expect. Cedar is not just structurally and acoustically exceptional — it is biologically active. When cedar wood is warmed, it releases phytoncides: volatile organic compounds produced by trees as part of their natural defence system. The primary phytoncide in cedar is cedrol, along with alpha-cedrene and thujopsene.
Research published in the International Journal of Immunopathology and Pharmacology found that phytoncide exposure significantly increases the activity of natural killer (NK) cells — a class of immune cells that play a central role in the body's defence against pathogens and abnormal cells [5]. The same research found that phytoncides reduce levels of stress hormones including adrenaline and noradrenaline, and increase the expression of anti-cancer proteins perforin and granzyme.
The broader literature on forest bathing (Shinrin-yoku) — which works largely through phytoncide inhalation — consistently shows reductions in cortisol, blood pressure, and heart rate, alongside improvements in mood, immune function, and parasympathetic nervous system activity [6]. These are the same physiological directions the UNiCUBE is designed to support through its vibration and heat systems.
When the UNiCUBE's far-infrared heat warms the cedar walls during a session, it gently activates this phytoncide release. The enclosed environment of the pod means the client is breathing cedar-infused air throughout the session — a passive, natural complement to the vibration and heat that most clients never consciously register, but that contributes to the distinctive quality of the experience.
Cedar's natural oils also give it significant antimicrobial properties. Cedarwood oil has demonstrated antibacterial and antifungal activity in laboratory studies, inhibiting the growth of common pathogens including Staphylococcus aureus and various mould species [7]. In a wellness environment where the pod is used by multiple clients throughout the day, this natural resistance to microbial growth is a meaningful hygiene advantage over synthetic materials.
This is not a substitute for regular cleaning protocols — Cubehouse maintains rigorous sanitation standards between every session. But the cedar's inherent antimicrobial character means the material itself is not a passive surface for microbial accumulation in the way that plastic, foam, or composite panels can be.
The UNiCUBE is built around four integrated technologies, each chosen because it amplifies the others:
| Technology | Primary Function | Cedar's Role |
|---|---|---|
| Sonic Pulse Core (Dida Doctor) | Multi-directional low-frequency vibration | Cedar acts as resonance chamber, amplifying and distributing vibration throughout the pod |
| Graphene & Ceramic Far-Infrared Heat | Deep tissue warming at 4–14µm wavelength | Cedar insulates the pod, retains heat efficiently, and stays comfortable to touch |
| Bian Stone Foot Plates | Far-infrared emission, ultrasonic pulses, negative ions | Cedar's thermal stability maintains consistent foot plate temperature |
| Natural Solid Cedar Construction | Acoustic resonance, thermal regulation, phytoncide release | The foundation that makes the other three systems work together |
Cedar is not a passive container. It is an active participant in the session — resonating with the vibration, insulating the heat, and releasing compounds that support the same physiological state the other systems are working to create.
Most clients don't walk into the UNiCUBE thinking about the wood. What they notice is the smell — a warm, clean, slightly resinous scent that signals something different from a standard wellness environment. They notice that the warmth feels even and enveloping rather than directional. They notice that the vibration seems to come from everywhere rather than from a single point beneath them.
These are the acoustic, thermal, and olfactory signatures of solid cedar doing exactly what it was designed to do.
The UNiCUBE is a holistic wellness tool, not a medical device. In the United States, it is offered for general wellness purposes — stress reduction, recovery support, and nervous system regulation — and is not intended to diagnose, treat, cure, or prevent any medical condition. The phytoncide and antimicrobial properties described in this article are based on general research into cedar wood and forest bathing; they are not claims specific to the UNiCUBE system.
Ready to experience it? Your first session at Cubehouse is free. Book online or visit us at 2179 Pineapple Ave, Unit 8, Melbourne, FL.
To understand the full technology inside the UNiCUBE, visit our Technology page.
Brémaud I et al. What do we know on "resonance wood" properties? Selective review and ongoing research. HAL Science, 2012. https://hal.science/hal-00811117v1/document
Acoustic Guitar Forum. Cedar/redwood tops and sympathetic resonance. http://acousticguitarforum.com/forums/showthread.php?t=410908
Haven of Heat. Thermally Modified Wood vs Cedar Wood for Saunas. https://havenofheat.com/blogs/sauna-guides/thermally-modified-wood-vs-cedar-wood-which-is-better-for-your-sauna-and-why
NW Immersion. Japanese Cedar vs Western Red Cedar. https://nwimmersion.com/japanese-cedar-vs-western-red-cedar-for-sauna/
Li Q et al. Phytoncides (wood essential oils) induce human natural killer cell activity. International Journal of Immunopathology and Pharmacology, 2006. https://pubmed.ncbi.nlm.nih.gov/16873099/
Leelanau Conservancy. The Therapeutic Effects of Forest Bathing. https://leelanauconservancy.org/2024/08/the-therapeutic-effects-of-forest-bathing/
Nikura. 10 Benefits and Uses of Cedarwood Oil. https://nikura.com/blogs/essential-oils/benefits-and-uses-of-cedarwood-oil