WVA™ — Water Vapor Aloft™ designates the stable suspension of water vapor in the occupied or upper convective zone when all interior and envelope surfaces remain above the dew point. This condition prevents condensation, allowing vapor to remain energetically active within the air mass rather than being released at a boundary surface.
From this controlled condition arises LEA™ — Latent Energy Aloft™, which identifies the quantified energy field embodied in that aloft vapor. In the PortalWall® framework, WVA™ represents the observable equilibrium state, while LEA™ represents the latent-energy calculus that follows from it — transforming the traditional static notion of relative humidity (RH%) into an energy-centric design and control metric.
Together, WVA™ and LEA™ form a sequential conceptual lineage — the process of stability giving rise to energy definition. They mark the shift from environmental measurement (humidity) to energetic architecture (latent energy management).
Novelty Statement:
As of November 9, 2025, the term Latent Energy Aloft™ (LEA™) does not appear in ASHRAE terminology, HVAC literature, meteorological references, or patent databases. It is an original PortalWall® construct, coined and defined by Yonatan Zvi Margalit within the PortalWall® thermodynamic and architectural framework to denote the latent-energy field resident in vapor under dew-point-safe enclosure conditions.
Trademark Use:
The marks WVA™ — Water Vapor Aloft™ and LEA™ — Latent Energy Aloft™ are used in commerce exclusively by PortalWall® as integral elements of its intellectual property and scientific vocabulary.
© Yonatan Zvi Margalit — Copyright Protected
PRIOR - State of the Art Complexity & Energy Transfer Paths - Designed-In
In the time it takes others to assemble metal framing, install thermal modules and apply metal back pans, we can complete multiple PortalWall® FORTified Opaque INfill™ panels — because our design eliminates all of those separate parts entirely.
Complexity Eliminated
Energy transfer paths — eliminated.
Vertical framing — eliminated.
PortalWall® FORTified Opaque INfill™ (FOI™) and the Water Draining Spandrel Assembly™ (WDSA™) work together through flat-diaphragm Parallels™ Technology — a continuous structural logic with no interruptive energy paths.
About the WVA™ Logo: DNA of PortalWall®
I realized that if this principle were not captured by a symbol — a simple badge of truth — it would take too long to explain. Thus, Water Vapor Aloft™ (WVA™) was born.
Water Vapor Aloft™ (WVA™)
The WVA™ logo embodies PortalWall®’s core principle: keeping water vapor aloft in occupied spaces to preserve energy, comfort, and health. The triangle represents enclosure stability, the upward arrow shows vapor rising, and the symbols inside reflect the essential elements of air and water.
Why it Matters - The SIGNAL
When vapor remains aloft in occupied spaces, it is a signal that the enclosure is airtight, continuous, and free of thermal-bridging cold spots. Latent energy is preserved, condensation is prevented, and indoor comfort and health are optimized. WVA™ is a compact, patent-protected symbol of PortalWall®’s performance and stability.
Latent Energy and the Missed Reality
Latent energy stored in water vapor is not inconsequential.
Allowing it to condense into puddles inside vast opaque zones of building enclosures is the opposite of energy efficiency — a reality ignored by every other enclosure solution.
PortalWall® recognizes that maintaining vapor in its aloft state preserves energy, prevents hidden damage, and sustains true thermal balance.
The Science Behind WVA™
- Pascal Rivers™ — vapor naturally seeks the path of least resistance; PortalWall® stops hidden “vapor rivers,” preventing condensation and mold.
- Pascal-Logic™ — a slight positive pressure keeps vapor in the living zone, stabilizes air, reduces energy use, and supports health.
The PortalWall® Difference
Unlike conventional walls, PortalWall® restores energy and well-being: thermal bridging is eliminated, cold spots vanish, and conditioned air circulates efficiently. The result is a building enclosure that sustains comfort, health, and thermal efficiency simultaneously.
Full Description: For an in-depth explanation of WVA™, the physics behind it, and its role in PortalWall® assemblies, see the full [web page article].
© Yonatan Zvi Margalit — Copyright Protected
Water Vapor Aloft™ (WVA™):
Signals That Your Wall Works
People spend nearly 87% of their lives indoors, making the building enclosure critical to health, comfort, and energy efficiency.
The Signal
Water Vapor Aloft™ (WVA™) shows the wall assembly is performing correctly:
- Airtight, continuous enclosure
- No cold spots, thermal bridges, or hidden condensation
- Optimal humidity (40–60% RH) preserved without risk
- Reduced mold and sick building syndrome
PortalWall® Difference
Patent-protected and unique, WVA™ proves that design and physics work together to maintain comfort, efficiency, and well-being in the occupied space.
Full Details: See the complete [blog article] for the science behind WVA™.
© Yonatan Zvi Margalit — Copyright Protected
PortalWall® — Architecture as the First Fuel™
PortalWall® embodies energy in renewal, turning the IEA’s principle of efficiency as the “first fuel” into architecture itself.
By focusing on the opaque, non-vision zones of the façade, PortalWall® ensures performance that cannot be disrupted by occupant behavior — no open windows, no fragile settings, no variables to fail.
Signals:
- MC²™ — delivers cost efficiency, scalability, and simple deployment.
- WVA™ — proves the wall assembly maintains comfort, optimal humidity, and health.
The Result: A coherent, reproducible system that performs across climates and building types — extreme efficiency, no moving parts, just measurable performance. It simply saves the energy you bargained for.
Together, these principles define a new façade logic: conserving before consuming, allowing air, energy, and wellness to move freely within every structure.
IEA chief: Energy efficiency is the world's 'first fuel' | World Economic Forum
© Yonatan Zvi Margalit — Copyright Protected
MC²™
Signals Economy of Build
and Scalability
MC²™ is PortalWall®’s guiding principle: two major components, one shared logic, designed to deliver more performance for less cost.
Core Components:
- Fortified Opaque Infill™ (FOI™): Fascia + Insulated Panel
- Water-Draining Spandrel Assembly (WDSA™): Spandrel Beam + Draining Carrier
By uniting precision curtain walling with insulated-panel efficiency, MC²™ creates a single, aligned system that is:
- Structurally sound
- Thermally efficient
- Easy to procure and assemble
- Globally scalable
The Signal: High performance at lower cost, proving that affordability is the true measure of a better wall.
Full Details: See the [blog article] for complete explanation of MC²™, FOI™, and WDSA™.
© Yonatan Zvi Margalit — Copyright Protected
July 25, 2025 – THERM Analysis Summary
WVA™ communicates wellness and efficiency. Not theory, but a measurable signal: it proves the enclosure works in harmony with nature — preserving water vapor in the breathing zone where health and comfort belong.
A full thermal analysis conducted with LBNL’s industry-standard THERM software confirmed that the PortalWall® assembly exhibits zero condensation risk under design conditions.
Even at outdoor temperatures as low as 0°F, interior surface temperatures remain well above the dew point — ensuring dry, mold-resistant performance.
This superior result is driven by the system’s underlying thermal logic:
- Flat-sheet diaphragm — replaces conventional vertical framing, absorbing and distributing energy uniformly.
- No vertical framing members — eliminating weak points typical of conventional façades.
- Continuous Outsulate™ capability — the flat diaphragm creates a robust plane for uninterrupted exterior insulation.
- Integrated heat sink and insulation layers — strategically placed to balance energy and moisture.
The result: a high-performance enclosure that manages energy and moisture with exceptional reliability — and provides visible proof that wellness and efficiency can coexist in one wall system.
PortalWall® was lab tested before it was conceived, built upon the proven performance of a Kingspan QuadCore® 4-inch-deep insulated panel—but improved upon, a panel with published thermal and structural data. From this strong foundation, the system was continuously improved and validated.
The true breakthrough lies in the patented enhancements described in U.S. Patent No. 10,329,758 B2—my first granted patent. These innovations structurally reinforce the panel without compromising its core integrity.
In fact, the design is so precisely engineered that the original manufacturer's warranty remains fully intact and carries forward with the PortalWall® system.
No Accommodations. No compromise. Just improvement.
NYCHA MY LESSONS LEARNED
https://www.linkedin.com/pulse/why-me-portalwall-yonatan-margalit-kfaye
PortalWall® + VIG, The next level
https://www.linkedin.com/pulse/vacuum-insulated-glass-8-sealy-drive-yonatan-margalit-aul6e
PortalWall® and WVA™: Turning Building Envelopes into Health Engines
https://www.linkedin.com/pulse/wva-science-behind-water-vapor-aloft-yonatan-margalit-gijte
WVA™ WATER VAPOR ALOFT EXPLAINED GRAPHICALLY
PORTALWALL FORTIFIED OPAQUE INFILL™
https://www.linkedin.com/pulse/portalwall-opaque-infill-yonatan-margalit-yxpye
WE LIVE IN SILOS & MY SOLUTION SHARED WITH NYSERDA IN DECEMBER 2019
https://www.linkedin.com/pulse/nyserda-portalwall-pon-3519pdf-yonatan-margalit-idpwe
When Efficiency Without Airflow Fails & How PortalWall® Improves
WVA™ WATER VAPOR ALOFT & THE WHITE BLOOD CELL ANALOGY
https://www.linkedin.com/pulse/wva-concept-water-vapor-aloft-yonatan-margalit-w7iue
MY HISTROY
https://www.linkedin.com/pulse/my-journey-industry-began-1984-yonatan-margalit-qi5pc
WHY WE BUILD THE WALL
PortalWall® Fortified Opaque INfill™
PH & PortalWall®
PortalWall®: Passive House Performance, Delivered Consistently
PortalWall® Is the critical layer Passive House often overlooks—the dynamic, structural, performance-enhancing core that ties everything together.
Designed by a practical engineering mind with a holistic view, cost careful, PortalWall® solves what others neglect:
- The opaque water-draining spandrel assembly
- The airflow logic that avoids mold and stagnation
Passive House is a target. PortalWall® is the only path to massive deployement without Value Engineering Risk.
It doesn’t just comply—it improves, integrates, and elevates.
So next time you hear “Passive House,” remember:
PortalWall® is what makes it real.
Better yet, we can visit you.
Yonatan Zvi Margalit is the Exclusive Global Licensor
Active-Wall™ & Portalwall® IP, Inc., A New York State Corporation Opened and Wholly Owned by Yonatan Zvi Margalit.
Corporation Scope: Manage Licensees, Collect Licensing Fees,
Procure & Resell Key Components to Licensees, as Stipulated in the License Documents.
GRASS ROOTS approach to deploying Active-Wall™ & Portalwall® We can meet you anytime in the New York Metropolitan Area.
Today | By Appointment |
PortalWall®
Relative humidity isn’t just a number — it’s energy in suspension, vapor uncondensed and drifting through air.
This unseen layer defines Water Vapor Aloft™ (WVA™), the language of air in motion, and within it lies a deeper force: Latent Energy Aloft™ (LEA™).
Each gram of vapor holds invisible heat — a reservoir of balance and renewal.
LEA™ shows the atmosphere is not empty space but a living thermal field to be guided and designed.
PortalWall® is the framework.