Glass performance data chart. LBNL International Glazing Database (IGDB) version 27.

Glass performance data chart 8 6mm 88 7 7 0. This manual presents useful information, technical and performance data and the installation guidelines for laminated glass products. 82 5. 37 SHGC. 27 0. annealed glass can be cut, machined, drilled, edged and polished. Read more about the tools below Glass Only performance data for our Full range of Glass Products. PPG architectural glass and coating combinations by product description and performance data, including winter U-value, outdoor visible light reflectance, Solar Heat Gain Coefficient (SHGC), Visible Light Transmit-tance (VLT) and Light to Solar Gain (LSG) ratio. architectural glass performance data and comparisons energy select | solarshield | stopsol 888-234-8380 | 800-251-0441 | info@us. All tabulated data is based on NFRC methodology using the LBNL Window 7. Brochures & Sell Sheets. 81 5. Warranties A leader in tools for the glass industry. These coatings control solar heat gain while optimizing light transmission. 3 software representing center of glass performance data. Combined with PPG A large amount of glazing configurations means the perfect glass can be yours. Comparative Residential IG Data Table; Tinted Glass with Low-e Glass Comparative Data Table; Vitro Monolithic Glass Comparisons Note: Data is based on laboratory spectrophotometric measurements and produced using Windows software for AFRC 100-2010 conditions, which is the internationally recognised method for describing glass performance. On a clear-over-clear double-glazed configuration, its superb 68% visible light transmission with only 11% reflectivity can help illuminate interiors, expand views, and connect indoors and out. A potential 6 dB performance loss between a based center-of-glass performance for many prospective glazing Performance Data and Comparisons The performance characteristics of Cardinal’s LoĒ® products are shown on the attached insulating glass performance charts. For those who demand more from their windows – enhanced style, great versatility and high performance – there’s American vinyl windows with Low-E insulated glass. Shading Coefficient. Using Glass with Low-e Coatings, such as Sungate ® or Solarban ® glass can help provide higher performance and reduce energy costs. 8 software program according to the procedures in ANSI/NFRC 100, ANSI/NFRC 200, and NFRC 300. Performance Data and Comparisons The performance of Cardinal’s LoE™ products are shown on the attached “Insulating Glass Performance Comparison” charts. 2 software. Laminated glass data is from the following sources: 1. Vitro Architectural Glass Performance Calculator: Calculates center-of-glass thermal and optical properties based on the selected IGU elements. 29 0. for describing glass performance. Insulating Glass Performance Data1, 10 Pilkington Uncoated Float Glass Outer Lite and Clear Float Glass Inner Lite [ Insulating units constructed of equal glass thicknesses and 1/2 (12. vitroglazings. 3 software for center of glass. Performance Data 1 of 6 and Comparisons The performance characteristics of Cardinal’s LoĒ® products are shown on the attached “Insulating Glass Performance Comparison” charts. 5. The adhesion of the interlayer material to the glass acts to firmly hold the pieces of the assembly together even if breakage of the glass should occur. 28 0. The same pairing yields a Visible Light Transmittance (VLT) of 51 percent, which fits well within the Comparison Chart The bar chart diagram is for indication only, for performance data please refer to the glass performance data tables at the end of this document. Actual values Coinglass Data Metrics Charts page is a tool for displaying the changes in important indicators of the cryptocurrency market. Technical Service Bulletins. A leader in tools for the glass industry. For Monolithic Glass Increase glass thickness For Laminated Glass Increase glass thickness Use different glass thickness for individual glass lites, i. 7mm ARO - 242 West 53rd Street. Data applies to: *Cambridge double-pane insulated glass units using double-strength glass with 11/16″ air space. When paired with clear glass in a standard one-inch insulating glass unit (IGU), Solarban® 90 glass offers a Solar Heat Gain Coefficient (SHGC) of 0. 7 12mm 84 7 7 0. 2 Tested using GED’s Intercept® ULTRA low-conductance warm-edge spacer system. Within ∓ 10% ≤ to SHGC:. This performance data is not a commitment for Cardinal to produce. Oceania Glass Window For glass make-ups that are the most optimal we can send you detailed information that will show a cross section of the glass make-up as well as more detailed performance specifications. Glass Analytics online tools offer a comprehensive suite of engineering and analytical reports that demonstrate the advantages of high-performance glass in building facades. Oceania Glass Window Performance Estimation Guide for IGU 20200909 Oceania Glass’ Insulated Glazing Unit Window Performance Estimation Guide specifies indicative The cryptocurrency data and indicators charts page of CoinGlass provides various data and indicators for multiple cryptocurrencies, including price, market capitalization, volume, and volatility. Calculations provided by Lawrence Berkeley Energy & NFRC ratings, Glass Performance, Performance Grade, Air Infiltration, Sound Transmission, Altitude Limits, Wind Load tables, and more. Data is based on testing ~36″ x 84″ glass to ASTM E413-87 in an acoustical wall. Hard coat glass is produced by heating the glass to a high temperature and exposing it to a chemical vapor. Title: GGI Clear Vistacool® glass is not available for first-surface applications. 24mm IGU consisting of 6mm glass /12mm argon/6mm glass. • (#) after coating is IGU coating surface number. 72 5. The results represent Center-of-Glass performance data based on ANSI/NFRC 100 and ANSI/NFRC 200 Environmental Design Conditions utilizing the LBNL Window 7. NFRC 100-2001 conditions have been used. For detailed information on the methodologies used to calculate the aesthetic and performance values in this table, please visit vitroglazings. 33 0. The same pairing yields a Visible Light Transmittance (VLT) of 51 percent, which fits well within the Comparison Chart While the primary focus is on residential applications, much of the information can be used to gain a better understanding of glass performance in all types of buildings. , ¼” glass + interlayer + 3/ 8” glass For Insulating Glass Units Increase glass thickness Increase air space dimension May 5, 2015 · This document provides performance data for various glass products from China Southern Glass (Australia). LBNL Optics 5 (version 5. 84 5. Actual values may vary due to production tolerances. Glass surfaces are counted from the exterior face of the building. GLASS 0; GLASS - REPAIR 0; COMMON QUESTIONS (FAQS) 0; All performance data calculated using LBNL Window 7. LBNL International Glazing Database (IGDB) version 44. U Value. 9 4mm 89 8 8 0. (#2), this identifies the position of the coated surface of the glass. Within ∓ 10% ≤ to Shading:. The values are based on double glazed units incorporating inner panes of 6mm clear glass and the outer pane is as shown in the table which has a low e coating incorporated into the glass. 52mm Clear PVB + 6mm Sunergy #4 All data are calculated using spectral measurements that conform to standards ISO 9050 (2003) (light & energy performances), EN 673 and NFRC 100-2010/ float glass (also called “flat” glass) that has not been heat-strengthened or tempered is annealed glass. R-Value: the amount of heat retained by the window. 67 0. The chart provides the ideal starting point in finding overall window performance data for single glazed and Insulated glass units combined with a range of generic framing types. Performance comparison chart Single Glazing Insulated Glass Unit Insulated Glass Unit with EnergyTech on surface #3 Product Insulation Solar Daylight Insulation Solar Daylight Insulation Solar Daylight Sep 9, 2020 · The Window Performance Estimation Guide specifies indicative overall window performance data for a range of glass and frame combinations. It is important to note that the above listed glass performance will differ to that of a window assembly using these products. The lower the number the better the glass. SHGC (Solar Heat Gain Coefficient). Generally, the following four terms are considered very important when it comes to evaluating glass performance: Visible Light Transmittance (VLT) Solar Heat Gain Coefficient (SHGC) Light to Solar Gain Ratio (LSG) U-Value, in both Winter and Summer single glass performance values vlt visible light transmission vlr visible light reflectance vlri visible light reflectance shgc u-value colour and type % external % internal % w/m2k clear float 3mm 90 8 8 0. The insulating glass units are constructed with two plies of glass and an airspace. 3mm - Double Pane IGU Tinted Glass Performance Data Notes: • Values are center of glass calculated using LBNL Window per NFRC 100, actual values may vary due to production tolerances. Argon fill is 90% and air fill is 100%. Performance Charts for an IG Unit, 1”OA with ½” air space and two lites of ¼” glass-With a Clear Inboard Lite: When paired with clear glass in a standard one-inch insulating glass unit (IGU), Solarban® 90 glass offers a Solar Heat Gain Coefficient (SHGC) of 0. Installing "Heavy" Inert Gas in the IG unit, such as argon or krypton, reduces heat loss across the air space by minimizing convection heat loss. Please see below for performance value definitions and page 2 for product information, recommendations and simulation conditions. The information is for the standard stock items in the Viridian Australia range. Soft coat glass is created by applying a thin film to a pre-cut glass sheet in a vacuum chamber. annealing float glass is the process of controlled cooling to prevent residual stress in the glass and is an inherent operation of the float glass manufacturing process. LBNL International Glazing Database (IGDB) version 27. Read more about the tools below process, though the context of the data is crucial. These are U-Valuew and SHGCw – but it is important to note that these are Total System Values (glass Pilkington Eclipse AdvantageTM Reflective Low-E Glass Outer Lite (#2 Surface) and Clear Float Glass Inner Lite For footnotes, please refer to page 21. 77 Aug 20, 2024 · Low-E glass coatings come in two types: soft and hard. Select either toughened, toughened heat soaked, heat strengthened, laminated or annealed float glass depending on application; Solarban ® 60 Starphire ® glass can help you achieve your design vision of a glass building with the ultimate in transparency and visual clarity combined with energy efficiency. 6 15mm 83 6 performance data These comprehensive charts present an in-depth breakdown of performance characteristics across vital categories for our diverse glass products. 9 5mm 88 8 8 0. The performance data below applies to triple insulating glass units Vistacool™ and Solarcool ® with Solarban z50 Solar Control Low-E Glass Vistacool (2) Azuria + Solarban z50 (3) Optiblue 9 30 12 20 11 0. Keyword search through the glass descriptions. The data is glass only and care should be exercised when evaluating manufacturer’s published data that the same Almost all of Therma-Tru's Classic-Craft, Fiber-Classic and Smooth-Star fiberglass door systems with or without clear and decorative glass doorlites have been tested and approved for coastal use. Solarcool® glass is available for both first- and second-surface applications. Read more about the tools below Performance Data U Value (W/m2. *OITC is estimated based on this test. Based on vendor testing, clear acid-etched glass performance data is estimated using regular clear glass of equivalent Thermal Performance Data Premium Double Hung Windows (8120) or U-Value A measurement of how much energy a material conducts. Understanding These Charts Technical Information Laminated glass data is from the following sources: 1. 47 0. Visit vitroglazings. Floor to ceiling windows provide light, transparency and sweeping views of Central Park The performance data below applies to lamin ated glass units constructed with two plies of glass and an interlayer . This coating is then allowed to harden. The following products and combi-nation of products are compared. 7 10mm 86 7 7 0. 9 1. 20 One Inch Insulating Glass Unit Comparisons with PPG Architectural Glass The performance characteristics of Cardinal’s LoĒ® products are shown on the attached “Insulating Glass Performance Comparison” charts. Winter and Summer U-Values are the only performance values available for spandrel glazing. Solar Heat Gain Coefficient (SHGC) Measures how well a window or door prevents heat from passing through it. Glass size and glazing system will affect STC rating. For this reason laminated glass is Oct 18, 2023 · Using the Performance Calculator, the user configures a suitable glazing make-up for their project and can view the corresponding performance data. The higher the number the better the glass. *3/4" (19mm) Insulating Glass Unit Performance Using 1/8 Product Performance and Comparison Data. The lower the U-Value, the greater the insulating effect. com specification section 088000 | us. Laminated Glass Construction STC OITC 100 125 160 00 2 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 Frequency (Hz) Sound Transmission Loss (dB) LAMINATED ACOUSTICAL DATA The performance data below applies to laminated glass units. The laminated glass units are constructed with two lites of glass and an interlayer. performance data These comprehensive charts present an in-depth breakdown of performance characteristics across vital categories for our diverse glass products. Access free data for Bitcoin and altcoins, both current and historical. * Data based on using Starphire® glass for both interior and exterior lites. Read more about the tools below All performance data calculated using LBNL Window 7. Whole of Window (WOW) data provides the thermal performance for the complete window including glass and frame. 34 0. Solar Heat Gain Coefficient: the amount of solar radiation which enters the house through radiation. Vendor supplied data. This Laminated Glazing Reference Manual is an updated edition of the original manual developed by the Glass Association of North American (GANA) in 2009. 70 95 ACUITY ® + ACUITY 82 15 15 0. You can see an example of one of these glass make-ups and performance specifications in the illustration below. Standard industry glass performance product data. It represents the heat gain through 3mm clear Product Data Sheet Vitro Architectural Vitro Monolithic Glass Comparisons Table of Performance Values*1 Glass Thickness Visible Light Transmittance (VLT)2 Visible Light Reflectance2 (Btu/hr°ft2°˚F) NFRC U-Value3 Solar Heat Gain Coefficient (SHGC)4 Light to Solar Gain (LSG)5 Inches mm Exterior % Interior % Winter Nighttime Winter Argon Feb 6, 2025 · HeatLock® Glass FAQ; Interpreting Performance Ratings for Andersen® Glass; Glass Flex or Movement; Related Topics. Select either Duo Plus™ or Duo Ultra™ High Performance IGU from Energy Performance Data chart. Clear Glass Resources CSI 3-Part Specifications available on GGI website, RIB (BSD SpecLink), and ARCAT. Video Gallery. 77 5. 29 1. In the winter, Low-E insulating glass units reflect heat back into the room, blocking as much as 71% of the heat that can escape through conventional double pane glass units. Glass colors represented herein are included only for the general purpose of glass selection. agc. Architectural Products Windows Projected 1100; 2727i; 3100i; 3232xpt; 3527i A leader in tools for the glass industry. com for more product information. The data is glass only and care should be exercised when evaluating manufacturer’s published data that the same environmental conditions have been used. 7mm) airspace ] 3/32 2. By Appearance. Contact sales Performance Data. This data is calculated using LBNL’s THERM and Window software Use the following product selection tool to find specific glass products by their performance statistics. Performance data is based on representative samples of factory production. Glass Glossary. The following products and combination of products are compared: • IG units with nominal 3 mm and 6 mm glass substrates; • IG units with clear, green, gray, and bronze non-coated glass substrates; (Surface) Glass (Surface) Glass Visible Light Transmittance (VLT)2 % Visible Light Reflectance 2 (Btu/hr•ft2•˚F) NFRC U-Value 3 Solar Heat Gain Coefi f ent i c (SHGC)4 Color Rendering Index (CRI) 5 Exterior % Interior % Winter Nighttime Winter Argon Uncoated CLEAR Glass + Clear 79 15 15 0. 6 0. Apr 4, 2017 · Explanation of performance data tables The following chart is an extract from the performance data table. com Viracon's solar and optical performance data is center of glass data based on the National Fenestration Rating Council measurement standards, calculated using Lawrence Berkeley National Laboratory's (LBNL) WINDOW 7 software. There are two fundamental values that stand out due to dictated minimum performance requirements of the National Construction Code (NCC). Annealing float glass is the process of controlled cooling to prevent residual stress in the glass and is an inherent operation of the float glass manufacturing process. Note: Data is based on laboratory spectrophotometric measurements and produced using Windows software for AFRC 100-2010 conditions, which is the internationally recognised method for describing glass performance. When choosing windows, it can help architects, designers and manufacturers make a more informed decision. The following products and combination of products are compared: • IG units with nominal 3mm and 6mm glass substrates; • IG units with clear, green, gray, and bronze To obtain samples of any Vitro Glass product, call 1-855-VTRO-GLS (887-6457) or visit samples. Our patented, world-class, sputtered LoĒ coatings remain unmatched for their quality, aesthetics and performance. K) (Summer- NFRC) VLR ext (%) VLR Int (%) ER (%) Light Performances Energy Performances SF (%) Sunergy SC Laminated, 6mm Clear + 1. 3mm Exterior Glass Interior Glass Visible Light SHGC Aug 4, 2021 · The key is in understanding what is trying to be achieved or controlled when considering glass performance. com or request our Architectural Glass Catalog. Emissivity is a measure of a surface’s ability to emit long-wave infrared radiation or room temperature radiant heat energy. ppgideascapes. 0; 2. Insulating Glass Unit (IGU) Performance Data Cardinal LoĒ™ glass sets the industry standard for energy-efficient coated glass products. Glass Type. Guardian Glass has developed easy-to-use, advanced software for glass and glazing system analysis. Energy AdvantageTM Low-E Insulating Glass Performance Data1,10 [ Insulating units constructed of equal glass thicknesses and 1/2 (12. Values are center of glass calculated using LBNL Window 7 per NFRC100 conditions. This thermal and optical performance data simulation tool utilizes the industry accepted software, Window7. PPG Glass Performance Calculator — This online tool The Performance Calculator allows the user to model a wide variety of laminated glass makeups using different float glass substrates, coatings and interlayer material, including those makeups where the coating faces the interlayer. Mar 3, 2025 · 1 Windows tested per NFRC 100. Less than or equal to. LBNL Optics 6 (version 6. Performance comparison chart To assist with selecting Viridian products we have developed a performance comparison arranged into three tables:. Environmental These glass solutions are available in UL752 Levels 1 through 8, catering to various security needs. The performance data below applies to monolithic glass. • Argon calculations based on 90% gas fill level. Glass size and glazi ng system will a˜ect STC rating. *OITC is estimate d based on this test. Mar 9, 2025 · The results represent Center-of-Glass performance data based on ANSI/NFRC 100 and ANSI/NFRC 200 Environmental Design Conditions utilizing the LBNL Window 7. Solarban ® 60 glass has up to 70% light transmittance and block 62% solar energy which can help you achieve your design vision with the ultimate transparency with energy efficiency. It is the user’s responsibility to assess whether the laminated glass makeup meets relevant regional standards and CoinGlass provides real-time data analysis for top-ranked cryptocurrencies, including current prices, charts, market capitalization, and trading volume. First-surface performance data can be modeled in our online eView Construct tool. This is expressed as a dimensionless number between 0 and 1. Data applies to double-pane insulating glass units using double-strength glass and laminated double-strength glass with a ½” airspace. Performance comparison chart Single Glazing Insulated Glass Unit Insulated Glass Unit with EnergyTech on surface #3 Product Insulation Solar Daylight Insulation Solar Daylight Insulation Solar Daylight Bitcoin Quarterly, Monthly, and Weekly Price Performance tracks Bitcoin’s price fluctuations over different time frames, highlighting trends, volatility, and market momentum across short, medium, and long-term periods. Each order is custom-made, allowing you to select from a variety of enhancements, including low-E coatings, low iron glass, privacy mirror tinting, and options to minimize or eliminate small. The data is glass only and care should be exercised when evaluating manufacturer’s published data that the same Centre of Glass Versus Whole of Window Data Glass only, or Centre of Glass (COG) performance data is an evaluation of the glass, with no contribution from the frame. For doors, the data applies to double-pane insulating glass units using tempered double-strength glass and laminated double-strength glass with a 9∕16″ airspace. Sep 9, 2020 · The chart provides the ideal starting point in finding overall window performance data for single glazed and Insulated glass units combined with a range of generic framing types. Values include; Colour, Visible Light Transmittance and Reflections, UV Blockage, U-Value, SHGC, Selectivity ratio, Acoustics and Weight: Mar 3, 2025 · Data applies to double-pane insulated glass units using a double-strength glass with a 1/2″ airspace. 5 76 17 18 62 16 48 0. ® ® ® A leader in tools for the glass industry. It includes 4 tables that list glass compositions and their properties such as visible light transmission, solar energy transmission, and U-value. Emissivity varies from 0 (no emitted infrared) to 1 (100% emitted infrared). For Consumers. 23, an improvement of 15 percent compared to Solarban® 70 glass. Search. 86 5. Product Name – Where # appears, i. This includes configured door systems with one sidelite, two sidelites and double doors. 5 software, NFRC 100 – 2010 conditions have been used. Solarban ® 60 Starphire ® glass allows ultra-clear glass to be used for vision glass, skylights, atriums, storefronts and entryways without sacrificing energy Float glass (also called “flat” glass) that has not been heat-strengthened or tempered is annealed glass. The monolithic glass is one lite of glass. Find the perfect glass solutions for your projects today. Glass surfaces are counted from the exterior to the interior of the building. 45 0. One-Inch Insulating Glass Units (IGUs) This table compares Vitro Architectural Glass product performance data when assembled in a one-inch (25 mm) insulating glass unit with a ½-inch (13 mm) air space and two ¼-inch (6 mm) lites. Oct 4, 2016 · The Performance Calculator – developed by Guardian’s technical team as part of the Guardian Glass Analytics Software suite and freely available – calculates the light and energy performance of any Guardian® glass, either used as a single sheet or any combination of type and thickness for double and triple insulating glass units. † IG units with nominal 3 mm and 6 mm glass substrates. 800 Park Drive, Owatonna, MN 55060 US | (800) 533-2080 ©2023 Viracon All Here we introduce the Vitro high performance low-E coated insulated glass performance,and recommend our matched coatings: 1. All performance data calculated using LBNL Window 7. The glazing can be virtually any construction, ranging from monolithic glass to multiple layers of glass, coatings and interlayers. The role glass is generally tasked with performing in a building or even a vehicle is to provide protection from outside elements (i. 8 operated by Lawrence Berkeley National Laboratory (LBNL) using International Glazing Database (IGDB) v103. The View and download the performance data and energy efficiency ratings for Anlin windows and doors (Thermal, Sound STC, Structural, Min/Max Sizes). 20 Vistacool (2) Caribia + Solarban z50 (3) Optiblue 5 30 12 20 11 0. Fabrication and Availability performance of glass products. Select appropriate overall thickness and glass types - Eg. The vapor bonds to its surface as the glass . The performance data below applies to an insulating unit. Technical Glass Guide. 75 5. e. Users can gain deeper insights into the development trends and characteristics of the cryptocurrency market and make more informed decisions for investment and trading through interactive charts and SunGuard SN 68 low-E coated glass provides a beautiful, natural look with balanced thermal performance and a 0. com. Stay informed about the latest price trends, market capitalization, and 24-hour price changes for Bitcoin and other leading cryptocurrencies, all in one convenient platform. Glass Performance Calculator Performance Data Single Glazing Noise Reduction Solution Charts . The values given are centre of glass values. All performance data is calculated using LBNL Window 7. Glass Performance Data. Each category serves as a crucial indicator, offering precise insights into the functional attributes of the glass and facilitating effective comparisons for informed decision-making. 25 1. rain, wind, cold or heat), while at the same time providing transparency (a good view), and Confirming Performance Data is crucial for compliance and suitability of glass solutions for your buildings’ needs. 1 Maintenance Pack 2); 3. 8 8mm 87 7 7 0. Annealed glass can be cut, machined, drilled, edged and polished. † IG units with clear, green, gray, and bronze non- Performance for Insulating Glass Units of 4 mm Outer Lite + 12 mm Airspace + 4 mm Inner Lite Glass Configuration 4 mm + 12 mm Gap + 4 mm UV % Visible Light Solar Energy U-Values W/m2*°K Reflectance % SF Win-NFRC Sum-NFRC EN 673 LSG Trans % Ext Int Refl %Trans %EN410 SHGC SC air argon air argon air argon SOLARBAN® 90 Quad Silver Neutral Low-E Table of Performance Values*1 Glass Thickness Transmittance2 Reflectance2 One-inch insulating glass data and comparisons can be found at www. It should be noted that the ENERGY STAR and The bar chart diagram is for indication only, for performance data please refer to the glass performance data tables at the end of this document. Vendor supplied spectral data files; 4. com or Commercial Glazing Options. A laminate is two or more sheets of glass with an inner layer of transparent plastic (interlayer material) to which the glass is adhered. These ratings provide measurements of a glass option's center of glass performance only. 1 Vitro Architectural Glass | Glass Performance Tables for International Markets On Cover Frasers Tower Product: Solarban® R100 on Optiblue® Location: Singapore All performance data is determined using LBL window 7. We provide real-time market data and historical data, as well as interactive charts and tools to help users better understand the market trends and changes in different cryptocurrency markets. By filtering by Visible Light Transmission… The table above shows performance data relating to high performance neutral solar control glasses available on the market with normal lead-in times. 0 Maintenance Pack 1); 3. Center of Glass Performance Data. The following products and combination of products are compared: • IG units with nominal 3 mm and 6 mm glass substrates; All performance data is calculated using LBL Windows 5. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. By Performance. 3 software and represents center of glass performance data. Solarban 60. Oct 10, 2024 · Understanding glass performance begins by understanding some key glass performance terms. flucm tcxk npri fwgu fadg jqwz afwv kqdkep gsqvoe mnws agtue fwwszeg yxvq qllas txgon