WexEnergy

What WexEnergy does

WexEnergy, LLC is a privately held, woman-owned company headquartered in Rochester, NY that designs, manufactures, and sells WexWindows, a transparent custom-fit window insulation panel system. The panels mount onto existing windows to create an optimized insulating air gap between the existing glass and the WexWindows panel, delivering thermal performance comparable to double- or triple-pane replacement windows at roughly 20% of the cost of new ENERGY STAR units. The company markets two product variants today — PolarSkin for cold-climate thermal retention and the upcoming SolarSkin for hot-climate solar heat gain reduction — supported by patented WindoWare measurement software that is licensed from a sister company, WexEnergy Innovations LLC. Independent validation by Taitem Engineering demonstrated a 33% reduction in heat transfer rate for single-pane windows and 23% for double-pane windows, with energy modeling showing average decreases of roughly 11.5% in natural gas usage and 26% in electric energy usage.

WexEnergy's competitive position is anchored by regulatory and intellectual property assets rather than scale. WexWindows is the first window insulation panel approved by the NYC Department of Buildings and has been approved for customer incentives by Con Edison, and the underlying technology is protected by six granted US patents plus eight pending international patent applications. Materials are Greenguard Certified (the same material used in COVID face masks), and the product has received the Solar Impulse Foundation Efficient Solution Label. Installation requires no tools, no construction, and takes 5-6 minutes per window, and the product does not disturb lead paint, making it suitable for pre-1978 buildings.

The company sells directly to building owners, facility managers, property managers, and educational institutions through a quote-based website and phone sales channel, with custom-manufactured panels produced for each measured window. Target segments include facilities and building owners (primary), schools and educational institutions, and property managers under pressure from energy code compliance mandates such as NYC Local Law 97. WexEnergy was co-founded by Ron Wexler, Ph.D. (CTO/CPO) and is led by CEO Rachel Rosen, who joined in June 2017 and brings 27 years of commercial and multifamily real estate experience. Across 2017-2020 the company raised approximately $1.36 million across a mix of small equity rounds and non-dilutive grants from investors and programs including Excell Technology Ventures, NYSERDA, ACRE, FuzeHub, NextCorps, The New York Community Trust, and DeltaClimeVT.

Name

WexEnergy

Legal name

WexEnergy, LLC

Website

https://wexenergy.com

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

1–10 employees

Short description

WexEnergy designs, manufactures, and sells WexWindows, a custom-fit transparent window insulation panel that retrofits onto existing windows to reduce thermal energy loss at roughly 20% of replacement cost, serving commercial building owners, property managers, and educational institutions in the Northeast US.

Ownership category

akta.pro rank

Product category

Window Insulation Panels (Building Envelope Products)

NAICS

Blind and Shade Manufacturing (337920)

akta.pro industry

PRIMARYIMADAIAC

Windows

Industrials, Manufacturing & Construction/Building Materials & Products/Doors, Windows & Architectural Openings

Keywords

• Window insulation panels
• Building envelope retrofits
• Energy efficient windows
• Window retrofit systems
• Thermal insulation products

Headquarters

HQ city

Rochester

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales

Revenue model

1. WexWindows Product Sales: One-time sale of custom window insulation panels to building owners and facility managers. The product is sold directly to customers who install the panels on their existing windows for improved energy efficiency.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

WexEnergy manufactures and sells WexWindows™, custom-fit transparent interior window insulation panels that snap onto existing windows without tools, creating an insulating air gap that reduces thermal energy loss by 33% for single-pane and 23% for double-pane windows. The product line includes climate-specific variants (PolarSkin™ for cold climates and SolarSkin™ for hot climates) and is sold at approximately 20% of the cost of full ENERGY STAR window replacement, primarily to commercial building owners, facility managers, and educational institutions in North America.

Differentiator

Problem solved

Functional benefit

Brands

• WexWindows: Affordable, easy-to-install window insulation panels that reduce thermal energy loss at the window. Custom-fitted transparent panels that snap onto existing windows without tools.
• PolarSkin
• SolarSkin
• WindoWare

Products and services

• WexWindows™ Window Insulation Panels

Quantifiable outcome

• 33% reduction in heat transfer rate for single-pane windows
• +5 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Taitem Engineering P.C.coreStrategic or Co-development PartnerIndependent third-party validation of WexWindows technology conducted at Taitem's window performance testing facility in Ithaca, NY. Validated 33% heat transfer reduction for single-pane and 23% for double-pane windows.
• Metro IAF Clean Energy InitiativecoreStrategic or Co-development PartnerMetro IAF Clean Energy Initiative connected MUMC with WexEnergy and contracted Transsolar KlimaEngineering to quantify the WexWindow Solution impact in the pilot study.
• Transsolar KlimaEngineeringcoreStrategic or Co-development PartnerEngineering firm contracted to quantify WexWindow Solution impact in MUMC pilot study. Preliminary analysis showed 12-15% reduction in heating and cooling demand.
• WexEnergy Innovations LLCcoreOEM/ Whitelabel/ Licensing PartnerSister company that developed WindoWare measurement software. WexWindows patents and know-how licensed from WexEnergy Innovations LLC for window measurement technology.
• Solar Impulse FoundationminorOthersWexWindows received the Solar Impulse Efficient Solution Label, recognizing it as a clean and profitable solution to protect the environment.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Cardinal Glass Industries: Cardinal Glass Industries is a major US-based manufacturer of residential and commercial insulating glass units, including high-performance low-E and triple-pane products. It competes indirectly with WexEnergy by offering the replacement-window alternative to the retrofit panel approach, with deep relationships with window fabricators and builders.
• Andersen Corporation: Andersen is one of the largest US window and door manufacturers, offering a broad portfolio of ENERGY STAR-rated replacement windows including its 100 Series, 400 Series, and A-Series. As an incumbent, it competes with WexEnergy by offering the full replacement alternative, with deep contractor and big-box retail distribution.
• Pella Corporation: Pella is a major US replacement window and door manufacturer offering ENERGY STAR-rated products across price points. It represents the incumbent replacement-window alternative that WexEnergy's retrofit solution is positioned against, with significant dealer and installer networks.
• Pilkington (NSG Group): Pilkington/NSG Group is one of the world's largest architectural glass manufacturers, producing high-performance products such as Pilkington Spacia vacuum glazing and various low-E / double/triple-pane units that compete with WexEnergy's value proposition of better window thermal performance. As an incumbent, it serves the broader market with replacement-grade glazing rather than retrofit overlays.
• Marvin Windows and Doors: Marvin is a premium US window and door manufacturer with a strong presence in commercial, institutional, and high-end residential markets — overlapping with WexEnergy's facility owner and school district segments. Marvin offers high-performance replacement windows as the incumbent alternative to WexEnergy's retrofit panels.
• Alpen High Performance Products: Alpen (formerly Serious Materials) manufactures high-performance, energy-efficient windows including commercial-grade fiberglass and insulating glass units with aggressive thermal performance claims. It competes with WexEnergy in the energy-efficiency-at-windows space, particularly for code-driven commercial and multifamily projects.

Emerging players

• Zola Windows: Zola Windows produces high-performance European-style tilt-and-turn windows for the US passive house and net-zero building market. It targets the same deep-energy-retrofit and institutional buyer segments as WexEnergy with a premium replacement window offering, serving as an emerging competing solution for the energy-conscious property owner.

Direct peers

• Magnetite: Magnetite manufactures acrylic and magnetic secondary glazing panels that attach to existing window frames to create an insulating air gap, reducing thermal transfer and noise. It competes directly with WexEnergy in the window insulation panel category, addressing the same retrofit problem (avoiding full window replacement) with a similar panel-based solution, though primarily serving Australian and UK markets.
• Indow Windows: Indow Windows makes compression-fit acrylic window inserts that press into existing window frames to reduce drafts and improve comfort without replacing the original window. It is the closest direct competitor to WexEnergy's WexWindows product in the secondary glazing / window insulation panel category, targeting residential and commercial retrofit customers with a similar no-tools, custom-measured installation approach.
• Heat Mirror (Eastman Chemical): Eastman's Heat Mirror is a suspended low-emissivity film technology used inside insulating glass units to create multiple insulating cavities, addressing the same thermal performance problem WexEnergy solves. While it is typically integrated into manufactured glazing units rather than retrofitted, it competes for the same energy-efficiency-at-windows value proposition.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds5 records

Investors7 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about WexEnergy