Glass u value chart. Namely, you have to divide 1 by U-value to get R-value.

Glass u value chart. 090" interlayer) 10 glass: Temp.

Glass u value chart 750" to 0. 65 2. Join as we dive deeper to understand the differences and why this is important for both commercial and residential properties. K) A measure of the air-to-air heat transfer due to thermal conductance and the difference in indoor and outdoor temperatures. A U-value is a means of measuring ‘thermal transmittance’, i. U-VALUE The U-value is the measure of how much heat is transferred through the window. So called 'Low-emissivity' or 'Low E' glass offers improved thermal insulation denoted by very low U-values. 61 5. Note: Measurement of improved U-values are calculated using a baseline of a Double Low-e 1” IGU Solarban ® 70 (2) Clear + Clear 1” with argon from Vitro Architectural Glass, with a U-value of 0. 5 Exterior tint may vary from unit to unit. and center of glass U‐values for various Vitro glass products. Thus, a single-paned window’s U-Value with a basic aluminum frame is above 1, usually around 1. 74 20% UV Tdw-ISO 0. Double glazing (with air cavity) U value = 2. 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. ” In other words, a u-value is used to measure how well or how badly a building component transmits heat from the inside to the outside. 12 8. The higher the U-value of glazing or windows, then the higher the energy conductivity through them. Stainless Steel “Warm Edge” Standard Aluminum Spacer. 15 1. The lower the number the better the glass. New Fineo vacuum insulated double-glazing has a U-value of just 0. • Argon figures are based on a standard 90% fill. %PDF-1. 840 0. R-value is the reciprocal of U-value or U-factor (the Heat Transfer coefficient). Figure 3 - U Value Comparison with Varying Emissivity 0. This coating option provides better protection against radiant heat transfer than single layer metallic Low E coatings. 34 . U Value. Use the following product selection tool to find specific glass products by their performance statistics. 78 15. It is NOT a measurement of the rest of the window, and does not reflect the thermal efficiency of the frame and other window components. Therefore, R-Value multiplied by U-Value always equals 1. 52mm grey 43 5 5 0. Namely, you have to divide 1 by U-value to get R-value. In Trans. How Is U-Value Determined? Learn the difference between R-value and U-factor ratings is how they are measured. 7 %âãÏÓ 44 0 obj > endobj xref 44 48 0000000016 00000 n 0000001586 00000 n 0000001731 00000 n 0000001787 00000 n 0000002944 00000 n 0000003074 00000 n 0000003589 00000 n 0000004168 00000 n 0000004570 00000 n 0000004998 00000 n 0000005347 00000 n 0000005460 00000 n 0000005993 00000 n 0000006615 00000 n 0000006867 00000 n 0000006892 U-Value Chart Triple Glazed Units 6 8 10 1412 16 18 20 Clear Float/Air/Clear Float/Air/ Clear Float Clear Float/Argon/Clear Float/Argon/ Clear Float Clear Float/Air/Climaguard A 1. 29 BTU/ ft. 38mm green 68 6 6 0. 73 30. Triple-pane glass features one additional pane of glass and one additional argon-gas blend filled air space. 6 0. 38mm grey 41 5 5 0. e. Calculating u value of glass is simple. The U-Value measures the rate of heat transfer through a window or other elements of a building’s envelope. The lower the number the better performance. U-value is sometimes known as thermal transmittance. 2/Air/ Clear Float Glass Only performance data for our Full range of Glass Products. 76 Visible Light 81% 59% UV Tdw-ISO 0. The U-value of a window is a measurement of the rate of heat loss indicating how well your windows are keeping valuable heat in. 43 0. 340" in addition to a standard pane of 0. Misunderstanding 2: The thicker spacer of insulated glass, the better energy efficient performance. 1 Product name – refer to product for more information. sg Testing 18/08/2020 27/05/2022 calculator , Glass , shading coefficient , shgc , u-value 0 Comment Related services Glass optical & thermal properties Mar 11, 2021 · Insulating glass unit (IGU) manufacturers report the overall, center-of-glass (COG), and edge-of-glass (EOG) U-factors for the IGU. over laminated temp. 2 Nominal thickness – the glass thickness or the makeup of a ThermoTech unit. 65 0. 48 SHGC 0. Nov 14, 2017 · The quick response is as follows: ¼” (6mm) laminated glass has an approximate winter nighttime U-Value of 1. com Framing, cladding, frame type and other items will affect the overall thermal values of a complete window. Jul 15, 2021 · A user-fiendly online glass U-value, SHGC & shading coefficient calculator, for single, double or triple glazing systems, developed by OTM Solutions Pte Ltd One Inch Insulating Glass Unit Comparisons with PPG Architectural Glass Transmittance Reflectance U-Value offering significantly improved thermal insulation when compared with uncoated glass. For windows, skylights, and glass doors, a U-factor may refer to just the glass or glazing alone. (5) UV Damage Weighted Transmittance (Tdw) is the weighted average for wavelengths 300 - 700 nm (based on CIE 89/3). 27 1. U-value: Measures the ease of heat flow (a lower value is better) Achieving lower U-values and higher R-values in glazing is key to meeting high performance targets, and VIG is a powerful solution. 7 1. 030" interlayer) 06 glass: Tempered over laminated HS (0. Glass Type Emissivity (low‐e) U‐Value* (air) U‐Value* (argon) Clear 0. While difference in U-Factor is relatively minimal, note that surface temperature warms by 3 to 4 °F at standard conditions, forestalling condensation Glass Spacer . High • U-Values are quoted in W/m2/K, rounded down to the nearest 0. 04 glass: Tempered over laminated HS (0. Calculating the U-factor of Kawneer systems has never been easier. 2-hr-°F (low-e IG)-Edge of Glass (EOG) Typical value 0. 34 Relative Heat Gain W/m2 535 427 332 565 414 308 262 U-Value The rating given to a window based on how much heat loss it allows. 60 5. 6 10. Consult the product U-Factor charts to see how they will affect the overall system U-Factor. fz@otm. Hence: the lower the U-value the better (similarly, the higher the R-value the better). 70 1. The lower the value, the greater is the insulating value. It quantifies how well a material can insulate against heat loss or gain. So we take our R-Value of 21 and divide one by that number, and we get a U-Value of . Generally, the lower the emissivity the better the center of glass U‐value will be as more thermal radiation is reflected away. The U-value will be the same for that glass regardless of the window the glass is in. 0476. Indicative U values for windows with wood or PVC-U frames εn is the emissivity of the low E glass. 9 2. NFRC U-factor ratings, however, represent the entire window performance, including frame and spacer material. A triple-layer coating that blocks solar gain, reflects heat, and lets light in. 5 5 10 15 20 25 30 /m 2 K) Cavity 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 tinted pvb continued 8. Hot southern climates need only a 0. 7 — that’s 12. Table 6. INSULATED LOW E GLASS UNITS SHGC S C U Value LOW E GLASS: Glass which has a Low E (Emissivity) coating provides greater insulation by reflecting the a building in comparison to 3mm Clear glass. Glass Handling and Safety Guide . 23/. 9 1. 25 SHGC 0. Noise Reduction Solution Charts This is why window U-values are improved using warm edge spacer bar but centre pane U-values are not. This means it allows heat to pass through it quickly. The lower the U-value the better the insulation May 13, 2024 · The higher the VT rating (value from 0 to 1), the more light the glass lets into the home. It is expressed as Watts per square metre Kelvin W/m2 K. 75 0. 24. 030, we get an R-Value for the window of 3. 65 Solar Heat Gain Coefficient 0. 26/. 125". how easily heat gets through windows and doors. 15 . 3 software and represents center of glass performance data. Keeps the view while beating the heat. 55 0. Double glazing with low emissivity glass (with air cavity) U value = 1. 5. 88 1. In warmer climates A large amount of glazing configurations means the perfect glass can be yours. 3800-3900 Series Glass Package IG Thick Interior Glass Exterior Glass U-Value SHGC VLT U-Value SHGC VLT Clear 3/4" 2. Energy Efficiency Content TBC. 5 85 8 8 65 7 <1 5. U-Value. Misunderstanding 1:Thicker glass has much better U value than thin glass, laminated glass U value is significantly lower than that of the same thickness glass. What is a U-Value? “U-value is the measure of the overall rate of heat transfer through a particular section of construction. Heat loss is quantified by the thermal transmittance or U-value (U). Center-of-glass coefficient Center-of-glass U-Values are calcu­ Window and door energy Data resources. U-Value Chart Triple Glazed Units 6 8 10 1412 16 18 20 Clear Float/Air/Clear Float/Air/ Clear Float Clear Float/Argon/Clear Float/Argon/ Clear Float Clear Float/Air/Climaguard A 1. For this reason laminated glass is U Value. Northern North-Central South-Central: Low U-Factor Medium Solar A good U-value does not indicate a surface quickly allowing heat to pass through it. 65 3. The lower the number is, the better the insulating qualities of the glass. In layman’s language, the lower u value, the better the thermal performance of the glass. Transmittance and reflectance values based on spectrophotometric measurements and energy distribution of solar radiation. The lower the number, the better Glass Spacer . units (Système Internationale d’Unités) of W/m²K, is the heat flux density through a given structure divided by the difference in environmental temperatures on either side of the structure in steady state conditions. com, or call 1-855-VTRO-GLS (887-6457). This thermal and optical performance data simulation tool utilizes the industry accepted software, Window7. The lower the U-Value is, the less heat escapes through the window. As the u-value decreases, so does the amount of heat that is transferred through the glazing material. Insulating Glass Unit Performance for 1-inch (25 mm) units with 1/2-inch (13 mm) airspace and two 1/4-inch (6 mm) lites Glass Type Outdoor Lite: Indoor Lite: Coating if Any + Coating if Any (Surface) Glass (Surface) Glass Visible Light Transmittance (VLT)2 % Visible Light Reflectance 2 (Btu/hr•ft2•˚F) NFRC U-Value 3 Solar Heat Gain One-inch insulating glass data and comparisons can be found at www. Double glazing with low emissivity glass (with argon gas cavity) U value = 1. 3mm Clear 2. 67 1. To convert U-value to R-value, you will need this key U-factor to R-value formula: R-Value = 1 / U-Value. 8 operated by Lawrence Berkeley National Laboratory (LBNL) using International Glazing Database (IGDB) v102. Jun 27, 2019 · What is the best R-value for windows and doors? Improved education and awareness of the cost of heating and cooling that escapes from poorly insulated components and glass panes have led to window and door manufacturers developing energy efficient windows and doors typically labeled "R5 U. to the glass plane. Impact-rated IG's will have a pane of glass that is approximately 0. 20 1. 20 and an R-value of R-5. Whereas the U-value measures how good a window is at preventing heat loss, and Energy Rating takes numerous factors into account – such as G-value and L-factor – to give a window an overall energy efficiency score. Laminated glass is a safety glass product and can be used in insulating (double Glasscraft U-values The U-value of a sealed unit is determined by the elements that are used to make up the sealed unit. Single glazing U value = 5. I. 20 . 15 12. 3 2. 25 or lower. Feb 5, 2024 · How are U-Values for windows calculated? Calculating U-values can seem complex, but it is really quite simple. In traditional double-paned insulating glass, heat flows through the air- or gas-filled gap between panes. Solar Heat Gain Coefficient (SHGC): A measurement of the sun's heat energy that passes through the glass. Where (#2) appears, this identifies the glass’ coated surface that is glazed to the inside of a building or the inside of a ThermoTech unit. frame. 6 w/m2K. Values for each contribution by: U0 = (Uc 9·Acg + Ue ·Ae9 + U(A1) I (Acg + Aeg + A1) , (2) where the subscripts cg, eg, and f refer to, respectively, the center-of-glass, edge­ of-glass and frame. Choosing windows with low U-values will also help to reduce your carbon footprint. By filtering by Visible Light Transmission, Solar Heat Gain, Reflectance and U-Value you can… Apr 26, 2024 · The U-Factor is a commonly used measurement (ranging from 0-1) of the rate at which heat flows through a window or patio door due to differences between indoor and outdoor air temperatures. All performance data is calculated using LBNL Window 7. 38mm grey 42 5 5 0. Refl. Solar Control Low-E Glass Standard Clear Insulating Glass Solarban® 60 (2) Insulating Glass U-Value 0. While difference in U-Factor is relatively minimal, note that surface temperature warms by 3 to 4 °F at standard conditions, forestalling condensation In cold climates, the best U-factor is anything at or lower than 0. The below chart shows the relationship between coating emissivity and U value for a unit with a 16 mm Argon (90%) filled cavity. 41 0. 67 5. It’s important to note, that these values are “whole window values”, not glass alone. May 20, 2015 · Glass type; U-value is an inverse measure; the lower the U-factor, the better insulated the window. 02/. The lower the value (from 0 U-Value (W/m2. Now, in the above-noted code requirements, we had a window U-value requirement of 0. and U-Factor. 3. 6 11. Each pane of glass is typically 0. Low U-Factor High Solar Heat Gain: Low E2: Features a double layer of silver on an inside surface of IG glass. These values are available for all Vantage aluminum windows and aluminium door products as part of their WERS rating. 3 1. A leader in tools for the glass industry. Those quoted are normal emissivities – uncoated glass is assumed to have a normal emissivity of 0. Read more about the tools below A measure of heat gain or heat loss through glass due to the thermal conductance and the difference in indoor and outdoor temperatures. 5 1. 6 w/m2K (Watts / square metre Kelvin). A high U-value means a high overall heat transfer. Skip to Main Content. (3) Comfort Indoor Glass Temperatures are for the center portion of the glass. without edge effects, and expresses the steady-state density of heat transfer rate per temperature difference between the environmental temperatures on each side. Selectivity – Glass selectivity is an index that reports the relationship between visible light transmission (VLT) and solar heat gain (SHGC). It provides year round performance and comfort. National Processing Capabilities . U-Factor. R-Value vs U-Value U-Value. Start now. The lower the U-Value rating of the aluminium window, the more efficiently it insulates heat loss / gain. U-Value – A measure of the insulating characteristics of the glass or how much heat gain or loss occurs through the glass due to the difference between indoor and outdoor temperatures and is measured Btu/ hr•ft2 and the IG unit thermal transmittance (U-Value). 21/. Choosing the wrong U-factor for your climate can lead to inefficiency and high utility bills. ppgideascapes. 5 85 8 8 64 6 <1 5. For further questions please contact a Marvin Dealer in your area. 090" interlayer) 10 glass: Temp. com or by calling PPG at 1-888-774-4332. 3333. 28: Pella manufacturers stipulate that ratings conform to applicable NFRC procedures for determining whole product performance. 90 . 8 w/m2K. Please see the charts below for each product's specific U-Values: Energy Star Qualification Chart – All Jun 8, 2022 · Difference Between U-Value and Window Energy Rating. (0. U-Values range anywhere from 0. 2-hr-°F (aluminum spacer)-Frame. The center-of-glass is the Jun 23, 2020 · In fact, you don’t need to click the “Calculate Glass U-value” button and the results are updated instantly after your changes. 030" interlayer) 08 glass: Same as 04, with white interlayer 99 93 glass: Same as 05, with i89 coating on interior surface 05 glass: Tempered over tempered VS Tested Performance Information In this case, you can use different components that are not specifically called for to meet the U-Factor specification. Solar Heat Gain Coefficient We goal to create much more worth for our customers with our rich resources, state-of-the-art machinery, experienced workers and exceptional providers for Laminated Glass U Value Chart, Tinted Tempered Glass Panels, Tempered Glass 1/2, Toughened Clear Glass,Curtain Wall Glass Specifications. A number which describes, in specific terms, the ability of a material or assembly to transmit heat from outside to inside surfaces. Double glazing (with argon gas cavity) U value = 2. 58 Performance documents for altitude limits, NFRC ratings, center of glass, joining window load table, air infiltration, and more. 71 0. 2/Air/ Clear Float 2. 02 while a 1” (25mm) insulating glass unit made with clear glass and with no coatings of any kind has an approximate winter nighttime U-Value 0f . Chevron Glass Pty Ltd has taken all care but accepts no responsibility for information contained within these charts. The latter also offers three opportunities to include a Low-E coating, versus only two on dual-pane glass. 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. Just because a unit is triple glazed, it Example: A 2-inch concrete insulating block has a U-value of U-0. 19/. Because Low-E glass improves (lowers) the IG unit U-Value, using Low-E glass will increase the unit’s interior glass surface temperature. United States R-values are given in Imperial units (ft2 ºF hr/Btu), but R-values can also be expressed in Metric units. • For multi cavity and low-E combinations please contact Customer Services. 18/. Finding the U-factor of our systems is simple and has never been more accessible. 760". 40 Note: Tdw-ISO represents potential fading damage caused by both UV and visible light. How are U Values Calculated? Once you are familiar with what is u value, the second question arises about how u values are calculated. The higher the U-Value, the more heat leaves the house via the system. 1 1. S. U-Value (COG) W/m2K 3. 7 10. 0. Out Refl. These could include thermal pressure plates in a curtain wall or warm edge spacers in glass units. U Value: the total heat transfer out of a window (Btu/hr-sq ft-F or W/sq m- C). 62 5. Assemblies with lower U-Values transmit less heat than those with higher values. Spacer. 31/. A lower U-Value indicates better insulation properties and is particularly important in colder climates where thermal insulation is critical. 32 . The U-value, usually expressed in S. 55 Visible Light 72% U-Value 0. 5 87 8 8 71 7 <1 5. This can improve What is a U-Value? “U-value is the measure of the overall rate of heat transfer through a particular section of construction. 5 0. Click here to view the declaration of conformity to EN 673: 2011 for U-values. 48 0. 78 20. . Thermal transmittance, called U-value, is the amount of thermal energy, measured in W (Watts) flowing through one m² (square meter) of a building component like a window, door, wall, or other part of the building structure if the temperature difference between both sides of the component amounts to 1 K (Kelvin), The unit of measurement is W/m²K. New informative (non-mandatory) Annex B22, included with this addendum, provides an example procedure for estab- Glass Designs 6'8" Height Doors Glass Size (Inches) 22x64 20x64 16x64 14x64 22x47 22x36* 20x36 22x27 8x36*16x40 8x42R 22x10A 22x10R 22x6 7x18 8x67x64 8x47 8x44S Decorative Glass 1. The lower the u-value the more restrictive the fenestration product is to heat transfer; reciprocal of r-value. 1. Aug 28, 2019 · For opening glass walls, the U-Value measures the heat that escapes from inside of the house, through the glass wall system, to the outside. 2" meaning the glass is the most energy efficient possible at a "5" rating and the window or door with all spacer. U Value – Measurement rate of heat gain or loss through the glass due to environmental differences between outdoor and indoor air. The lower the U-Value, the better the window acts as a heat insulator. 25. It measures the insulation efficiency across the material’s thickness, unlike U-values which indicate heat loss. It is measured in watts over m2 per degree Celsius (w/m2°C). 20 to 1. 08 Glass construction: Dual-pane glass has two panes of glass with an argon-gas blend in between for added insulation. Builders, the U. 47 0. annealed glass can be cut, machined, drilled, edged and polished. This Part provides indicative U-values for windows, rooflights and doors. 1 (800) 929-3667 (Door) Low E Insulated Glass. It is more U value is typically measured in Watts per square metre Kelvin or W/m2K. Solar Performance of Glass When the solar spectrum (sunlight) strikes glass, one of three things occurs, it is either reflected The Center-of-glass U-value is a measurement of ONLY one location on the glass. 60 U-factor, while mixed climates (with high temperatures in summer and low temperatures in winter), require a U-factor at or equal to 0. Please see the charts below for each product's specific U-Values: Energy Star Qualification Chart – All Determining the U-Values of the glass and complying with the National Energy Act may be easier than you think. 5?? w/m2K. U Value Calculator: Please choose the depth of foam glass that can be put down - 150, 200, 250 or 300mm 4 Values are based on comparison of Renewal by Andersen® double-hung window U-factor to the U-factor for clear dual pane glass non-metal frame default values from the 2006, 2009, 2012, 2015 and 2018 International Energy Conservation Code "Glazed Fenestration" Default Tables. For this reason laminated glass is Feb 5, 2024 · How are U-Values for windows calculated? Calculating U-values can seem complex, but it is really quite simple. 45 For more information about Solarban® 60 low-e glass and other Cradle to Cradle Certified® architectural glasses by Vitro Glass, visit vitroglazings. 30. The overall U-Value is l')Stimated using area-weighted U. (4) The UV Transmittance is determined as an average for wavelengths 310 -380 nm. 125" thick, so the air gap for a 1" IG with two panes of glass will be approximately 0. The lower the U-value, the better. The more similar the U-value of a unit’s components, the more similar the U-value of the finished product will be. But what is a U-value? And, for that matter, what are G-values and L-values, and why are they important? U-values explained. What you need to do is determine the U-Value in relation to your relevant fixtures, and estimate their cost in relation to Aug 18, 2020 · Online glass U-value, SHGC & shading coefficient calculator: V2. Values include; Colour, Visible Light Transmittance and Reflections, UV Blockage, U-Value, SHGC, Selectivity ratio, Acoustics and Weight: calculate U-Factor:-Center-of-glass (COG) Typical value 0. To calculate a U-value, the heat transference rate is divided by the temperature difference on either The U-value of a window is a measurement of the rate of heat loss indicating how well your windows are keeping valuable heat in. 38mm bronze 50 5 5 0. 4 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. This means that lower U-values mean better performance in terms of insulation. 5 "U" Value. The lower the U-Factor, the better the insulating value. 2 applies to windows with metal frames, See full list on vitroglazings. The lower the U-value the better the thermal performance of the glass. Surprisingly, insulating glass spacers can affect . Using the U-Factor data, the R-Value can be determined. Typical value 0. 0 chen. 1 to 1. Clear 6. Is the glazing parameter that characterizes the heat transfer through the central part of the glazing, i. Winter and Summer U-Values are the only performance values available for spandrel glazing. 27 . 48/. Thus an additional benefit of using Low-E glass is that it permits a higher relative humidity in a room before condensation will occur. 2-hr-°F (thermal break) Frame U-Factor includes heat transfer through surfaces perpendicular . Full compliance to ISO 10292 or EN 673 Accuracy has been validated with other independent codes. U-Factor Describes the resistance of the door glass to conducting heat and cold through the unit. float glass (also called “flat” glass) that has not been heat-strengthened or tempered is annealed glass. ENERGY STAR does not consider center-of In this section, we will explore the difference between two of the most significant glass performance measures; U-Value and R-Value. Outperforms tinted glass. A. 5% more energy efficient than triple glazing. Shading Coefficient (SC): A measurement of the heat gain through the glass compared to a single lite of clear 1/8" glass. A laminate is two or more sheets of glass with an inner layer of transparent plastic (interlayer material) to which the glass is adhered. Department of Energy, American Society of Heating Refrigerating and Air Conditioning Engineers, and the National Fenestration Rating Council are used for the Sec-tion 7 test cases. Here is how it works: Thermal resistance, or the R-value, indicates how well a material holds onto heat. 1 applies to windows (and rooflights) with wood or plastic frames. Enter the details of your project into our Thermal Calculator and measure thermal performance for any system, solar heat gain and visible light transmittance in less than 60 seconds. A single-pane window has a U-value of about 1. Materials with very different U-values that are used to make a unit like a window can reduce the unit’s overall ability to stop the transfer of heat. Quick Summary:At a quick glance - the U-value is the measure of how well a material resists heat flow. 1 2. 57 0. Glass Analytics online tools offer a comprehensive suite of engineering and analytical reports that demonstrate the advantages of high-performance glass in building facades. A standard double-pane window has a U-value of about 0. This is why our customers often want lower U-values as they are Numbers: U-Factor / Solar Heat Gain Coefficient x: Indicates Product Availability Indicates Product is Energy Star Qualified in Northern Zone Indicates Product is NOT Energy Star Qualified Glass Designs 6'8" Height Doors Glass Size (Inches) 25x66 25x51* 10x51 25x42* 21x35 25x35 15x38 10x42 10x8 Decorative Glass. 25, while triple-pane windows may have U-values around . 08 A higher U-value means there is more heat transfer and a low U-value is less heat transfer which means a higher insulated structure. 7 0. U-Factor more than . 12 10. The overall IGU U-factor can be determined using the EOG and COG values and will be affected by the IGU make-up, including spacer type, IGU gas fill type, coatings, overall thickness, etc. Warmly welcome to cooperate and develop with us! we Cardinal's LoĒ³-366 glass is the new standard in energy efficiency. SHGC Download technical files for window and door size charts, product design and performance information, BIM files, architectural specifications and more. Full details about calculating the U-value of a window or door are given in BS EN ISO 10077-1. When applied to building components such as windows, the lower the U-value, the greater the energy efficiency. 89 The gas mixture is assumed to consist of 90% argon and 10% air Alternatively, specify Pilkington Insulight™ Therm 1. The lower the U-value the better insulation performance of the unit, which is why our customers often want lower U-values, because they are proof of better performing products. U-factor is the rate at which a window, door, or skylight transmits non-solar heat flow. Jan 14, 2017 · The glazing on the glass has its own U-value. It is expressed as Watts per square meter Kelvin W/m2 K. 3mm Clear 0. EOG. 47. 64 0. Glass has a low R-value, so by 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. U-value scores typically range from 0. BTU/ ft. If we do our reciprocal calculation using a U-Value of . 7 The shaded boxes VIRIDIAN GLASS GUIDE™: GLASS PERFORMANCE - SINGLE GLAZING Product Name Nominal Thickness Visible Solar UV Trans U Value SHGC Weight kg/m2 Selectivity Trans. 74 25. For data on: Solargreen® Glass — see AtlanticaTM Glass Solex® Glass — see SolexiaTM Glass Azurlite® Glass — see AzuriaTM Glass At Energlaze we specialise in providing glazing solutions to increase the comfort of your home and lower your heating bills. Glass construction: Dual-pane glass has two panes of glass with an argon-gas blend in between for added insulation. As you can see, U-value is the inverse of the R-value. Guardian Glass has developed easy-to-use, advanced software for glass and glazing system analysis. bggcf jrpc rmufmu ljpilqo ivf ehqe lpv bysjpt baguvy yzltnx jxpldz pvftwdw fpr lpbacy tjgfzaut