Applications of Low-emissivity Glass in Industrial Manufacturing

As a producer of advanced chemical glass materials, we deliver low-emissivity (Low-E) glass for performance-driven sectors. The following scenarios demonstrate how manufacturers integrate our Low-E solutions to achieve targeted energy savings, regulatory compliance, and enhanced end-product functionality.

1. Architectural Glazing for Commercial Buildings

Manufacturers in the architectural sector apply Low-E coatings to float glass during off-line magnetron sputtering or pyrolytic processes. The resulting products support building projects seeking superior thermal insulation, solar control, and daylight performance. Users select coating composition and thickness based on climate zone, building orientation, and project certification needs, while balancing visible light transmission with minimized solar gain. This glass plays a pivotal role in achieving green building certification and long-term HVAC cost reduction for office towers, educational facilities, and hospitality venues.

Industry compliance standards

• EN 673: Determination of thermal transmittance (U-value)
• EN 410: Determination of luminous and solar characteristics
• LEED (Leadership in Energy and Environmental Design) project criteria
• ASHRAE 90.1 – Energy Standard for Buildings Except Low-Rise Residential Buildings

Typical usage ratio

• Low-E coating thickness typically ranges from 10 nm to 150 nm, applied to 4–12 mm clear float glass; specific layer stack (Ag/oxide/SiNx) varies by climate, window orientation, and performance targets

Downstream process integration

• Glass undergoes off-line magnetron sputter coating or on-line pyrolytic application; integrated into insulating glass units (IGU) with air or inert gas fill; units then framed, sealed, and installed as facades, curtain wall, or fenestration

Final product types

• Double- and triple-glazed windows
• Architectural curtain wall panels
• Skylight and atrium assemblies
• Storefront window systems

2. Residential Window Systems

Window system OEMs utilize Low-E treated glass to boost the energy efficiency of exterior windows in single and multi-family dwellings. In-situ tempering or lamination processes follow the base layer application, ensuring durability and compliance with local weathering standards. Performance is balanced between wintertime heat retention and summertime solar rejection according to regional regulations. End users benefit from lower heating/cooling bills and increased comfort without sacrificing daylight or color neutrality.

Industry compliance standards

• NFRC 100 & 200: Procedure for determining fenestration U-factor and solar heat gain coefficient
• Energy Star Most Efficient criteria
• ASTM E2190: Insulating glass unit durability
• Local residential building codes (e.g., International Residential Code sections N1102.3.2)

Typical usage ratio

• Coated single lite or insulating glass assemblies, using 6–10 mm glass sheets; silver-based Low-E layer between 15 nm and 120 nm, adjusted for SHGC and U-factor per customer project

Downstream process integration

• Glass receives hard or soft Low-E coatings; units then tempered, laminated, or screen-printed as needed; processed into IGUs in semi- or fully automated lines before window frame assembly

Final product types

• Residential double- and triple-glazed windows
• Sliding and casement window assemblies
• Low-E skylights
• Balcony and patio doors

3. Automotive Glazing and Windshields

Automotive glass producers incorporate durable Low-E coatings to meet stringent thermal comfort, condensation control, and emission reduction goals for OEM vehicles. Integration occurs in flat and curved windshield as well as sidelights, where coatings require robust scratch resistance to withstand assembly and on-road wear. Low-E layers help stabilize interior temperatures, minimize air conditioning demand, and assure defrost and demist performance without optical distortion, meeting automotive homologation standards.

Industry compliance standards

• ECE R43: Uniform provisions concerning the approval of safety glazing
• ISO 3538: Road vehicles – Safety glazing materials – Methods of test
• FMVSS 205: Glazing materials for US automotive production
• OEM program-specific sun load and durability tests

Typical usage ratio

• Coating thickness ranges from 20 nm (functional Low-E) to 100 nm (solar reflective), applied to 2.1–4.76 mm automotive glass types; ratio adjusted for visible transmission (VLT) and solar reflectance within regulatory limits

Downstream process integration

• Coated on float or bent glass, then laminated with PVB interlayer for safety; glass cut and shaped to finished size, edge processed, and fitted with mounting hardware or heating elements at Tier-1 suppliers

Final product types

• Windshields (laminated, solar control)
• Side windows and rear lights
• Sunroofs and panoramic roof panels
• Electrically heated glazing for demisting

4. Refrigerated Display and Cold Storage Equipment

Appliance and commercial refrigeration manufacturers adopt Low-E glass to improve insulation and reduce condensation in chilled and frozen display cases, walk-in coolers, and glass doors for retail and industrial cold storage. Coating processes ensure the glass faces the warm zone, minimizing heat exchange and frost build-up, thus lowering compressor run time and enhancing product visibility. Integration targets compliance with food storage safety, anti-fog requirements, and high cycle life in demanding retail environments.

Industry compliance standards

• EN 62552: Household refrigerating appliances – Characteristics and test methods
• NSF/ANSI 7: Commercial refrigerators and freezers (section on glass and condensation control)
• UL 471: Outline for Commercial Refrigerators and Freezers
• EU EcoDesign Directives for commercial refrigeration equipment

Typical usage ratio

• Low-E coatings applied to 3–8 mm glass, with multi-layer silver or tin oxide stacks between 40–130 nm total thickness; adjusted by humidity control and visibility requirements for clear viewing

Downstream process integration

• Glass coated and then fabricated into IGUs; units receive anti-fog films as needed; assembled as door panels, partitions, or lids; gaskets and handles affixed for installation in refrigeration enclosures

Final product types

• Refrigerated display case glass doors
• Walk-in cooler glazing
• Freezer cabinet observation panels
• Beverage cooler door assemblies

5. Solar Energy Photovoltaic Module Manufacturing

Photovoltaic module fabricators specify Low-E glass as a component for solar collector covers and building-integrated photovoltaic (BIPV) products. Low-E layers, either beneath or above anti-reflective coatings, support high solar transmittance while limiting thermal emission losses, improving panel conversion efficiency and module lifespan. Careful control of coating uniformity and spectral selectivity governs the overall yield and reliability under outdoor exposure and UV cycling.

Industry compliance standards

• IEC 61215: Terrestrial photovoltaic (PV) modules – Design qualification and type approval
• IEC 61730: PV module safety qualification
• UL 1703: Flat-Plate Photovoltaic Modules and Panels
• TÜV Rheinland 2 PfG 1169/08.2007: Requirements for PV glass

Typical usage ratio

• Low-E functional layers between 10–80 nm, typically applied to 3.2 mm high-transparency float glass; ratio chosen to maximize solar transmission (>90%) and minimize IR emission

Downstream process integration

• Glass cleaned and coated before anti-reflection treatments; patterned for electrical contacts if used in BIPV; laminated with encapsulant (EVA, PVB), PV cells, and backsheet; modules assembled, framed, and tested for outdoor use

Final product types

• Pleated-front BIPV façade/roof panels
• Standard crystalline silicon PV modules
• Thin-film photovoltaic panels
• Solar thermal collector glazing

6. Greenhouse and Controlled Environment Agriculture

Agricultural infrastructure providers select Low-E glass to construct high-performance greenhouses for year-round horticulture and vertical farming. The application of advanced Low-E coatings strikes a balance between required solar transmission for photosynthesis and reduced longwave heat loss, stabilizing interior temperatures in both temperate and cold climates. UV-stable coatings maintain performance without compromising mechanical strength or transparency, extending the crop growing season and reducing greenhouse heating loads.

Industry compliance standards

• EN 13022-1: Glass in building – Structural use of glass in greenhouses
• CE certification for greenhouse glass (EU Construction Products Regulation)
• ISO 9050: Glass in building – Determination of light transmittance, solar direct transmittance, total solar energy transmittance
• Relevant local energy efficiency regulations (e.g., Dutch horticultural climate requirements)

Typical usage ratio

• Coating thickness 15–60 nm on 4–6 mm low-iron horticultural glass; value adjusted to optimize PAR (photosynthetically active radiation) transmission versus ambient energy loss

Downstream process integration

• Coated glass cut to size and edge polished; panels assembled into greenhouse frames using weatherproof sealants; units integrated with automated window opening and climate control systems

Final product types

• Commercial greenhouse panels
• Vertical farm enclosure walls
• Research facility glazing for horticulture
• Curtain wall structures for botanical gardens