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13.October.

2022
PERFORMANCE
By VALLEJO GOMEZ, Santiago
CALCULATOR

New Project 01

Thermal
Visible Light Ultraviolet Solar Energy Properti
es

Glass 1 & Glass 2 & U-Value


Make-up Name
Coating Coating Transmit Reflectance
Transmit Reflecta (Ug
Skin Secondary
tance CIE Damage tance nce Solar Factor Btu/hr·ft²·
Damage Heat
Factor (τdf) (g%) F)
Factor (Fsd) Transfer (qi)
Visible (τv [per ISO
ρv % out ρv % in Solar (τe %) ρe % out
%) 10292]

Guardia Guardia
Default Make-up n n
78 14 15 0.00 0.42 52 10 0.60 7.91 0.5
01 ExtraCle ExtraCle
ar (CE) ar (CE)

Calculation Standard: ISO 9050: 2003

Default Make-up 01

Outdoors
Guardian ExtraClear (CE) #1 -----
GLASS 1
Thickness = 3/8" (10mm) #2 -----
INTERLAYER 1 PVB Clear 2.28mm (CE)
Guardian ExtraClear (CE) #3 -----
GLASS 2
Thickness = 3/8" (10mm) #4 -----

GAP 1 100% Air, 1/2" (12.7mm)

Guardian ExtraClear (CE) #5 -----


GLASS 3
Thickness = 3/8" (10mm) #6 -----

Total Unit (Nominal) = 1 23/32 in Slope = 90°


Estimated Nominal Glazing Weight: 14.42 lb/ft²

Indoors

Important Notes

Calculations and terms in this report are based on ISO 9050: 2003 and ISO 10292: 1994. The performance values shown above
represent nominal values for the center of glass with no spacer system or framing.

Laminated products:
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. It is the user’s
responsibility to assess whether the laminated glass makeup meets relevant regional standards and complies with applicable
laminated glass safety regulations.

In addition, when the laminated glass makeup includes a coating facing the interlayer material, there may be a loss of thermal
insulation performance and a color change compared to non-embedded coated class.

Non-specular products (translucent or diffuse):


The performance measurement for non-specular (translucent or diffuse) materials such as translucent interlayers or acid
etched glass surface, or surface with ceramic frit is limited by the current experimental technologies. Since measurements
capture physically only a part of the resulting radiation, calculated performance results provided herein and based on such
measurements are not compliant with any standard (including EN 410) and may only be used as a general reference. Actual
values may vary significantly based upon exact fabrication process, as well as type, thickness and color of used non-specular
material.

Page 1 of 3
PERFORMANCE
CALCULATOR

Explanation of Terms according to ISO 9050: 2003 and ISO 10292: 1994.

Visible Light Transmittance (Tv, %) is the percentage of incident light in the wavelength range of 380 nm to 780 nm that is
transmitted by the glass.

Ultraviolet (UV) Transmittance (Tuv, %) is the percentage of the incident solar radiation transmitted by the glazing in the 300
nm to 380 nm range. The relative spectral distribution, Sλ, used to calculate the UV-transmittance is derived from the
global solar irradiance given in ISO 9845-1:1992, Table 1, column 5.

Solar Energy Direct Transmittance (Te, %) is the percentage of solar energy at normal incidence directly transmitted by the
glass. Solar Energy is the radiant energy from the sun having a wavelength range of 300 nm to 2500 nm at an air mass of
1.0, global, per CIE #85: 1989.

Visible Light Reflectance Outdoors/Indoor (Rv out/in, %) is the percentage of incident visible light directly reflected by the
glass.

Solar Direct Reflectance Outdoors/Indoors (Re out/in, %) is the percentage of incident solar energy directly reflected by the
glass.

Solar Energy Absorptance (Ae, %) is the percentage of the sun's energy that is absorbed by glass.

Shading Coefficient (sc) is Solar Factor divided by 0.87. It is a measure of the solar heat gain referenced to 3 mm clear glass
which has the designated value of 1.00.

Solar Factor or Total Solar Energy Transmittance or g-value (g%) is the total solar radiation transmitted by the glass.

Secondary Heat Transfer Coefficient (qi) ) is the result of heat transfer by convection and longwave IR-radiation of that part of
the incident solar radiation which has been absorbed by the glazing.

CIE damage factor (τdf) is the factor associated with solar radiation in the wavelength range of 300 nm to 600 nm which may
contribute to damage of materials.

Skin damage factor (Fsd) is the factor associated with solar radiation in the wavelength range of 300 nm to 400 nm which may
contribute to damage of skin.

Colour Rendering Index in transmission, D65 (Ra) is the change in colour of an object as a result of the light being transmitted
through the glass.

U value - parameter of glazing which characterizes the heat transfer through the central part of the glazing, i.e. without edge
effects, and states the steady-state density of heat transfer rate per temperature difference between the environmental
temperatures on each side.

The U value is given by: 1/U = 1/he +1/ht + 1/hi

Where he and hi are the external and internal heat transfer coefficients; ht is the total thermal conductance of the glazing.
The U value is given in watts per square metre Kelvin [W/(m²×K)].

The external heat transfer coefficient (he) is a function of the wind speed near the glazing, the emissivity and other climatic
factors. For ordinary vertical glass surfaces the value of (he) is standardized to 23 W/(m²×K) for the purposes of
comparison of glazing U values.

Corrected emissivity of uncoated soda lime and borosilicate glass surface is 0,837. This procedure does not consider the
improvement of the U value due to the presence of externally exposed coated surfaces with an emissivity lower than
0,837. Temperature difference between bounding glass surfaces is 15 K. Mean temperature of gas space is 283 K.

Emissivity is the ratio of the radiance from the surface to that from a black body viewed under identical optical and
geometrical conditions and at the same temperature. The emissivity value given to a material is the ratio of heat emitted
compared to a black body, on a scale of 0 to 1. A black body would have an emissivity of 1 and a perfect reflector would have a
value of 0.

Normal Emissivity (εn) refers to the ratio, in a direction normal to the surface, of the emissive power of the surface of the
glass to the emissive power of a black body.

Corrected Emissivity (ε) is calculated by multiplying the normal emissivity (εn) by a suitable correction coefficient, selected
according to the normal emissivity value. The values of the correction coefficients were decided on the basis of extensive

Page 2 of 3
PERFORMANCE
CALCULATOR

measurements of the angular emissivity of uncoated glass, borosilicate glass and glass ceramics and of architectural
coated glass. The corrected emissivity of uncoated float glass, borosilicate glass and glass-ceramics at 283 K was
standardized at 0.837.

Disclaimer
This performance analysis is provided for the limited purpose of assisting the user in evaluating the performance of the glass
products identified on this report.

Spectral data for products manufactured by Guardian reflect nominal values derived from typical production samples or CE
Initial Type Testing and subject to variations due to manufacturing and calculation tolerances. Spectral data for products not
manufactured by Guardian were derived from the LBNL International Glazing Database and have not been independently
verified by Guardian. Guardian recommends a full-size mock-up be approved.

The values provided herein are generated according to established engineering practices and applicable calculation standards.
Many factors may affect glazing characteristics, including glass size, building orientation, shading, wind speed, type of
installation, production process and others. The applicability and results of the analysis are directly related to user inputs and
any changes in actual conditions can have a significant effect on the results. It is the responsibility of the users of the analysis
to ensure that the intended application is appropriate and complies with all relevant laws, regulations, standards, codes of
practices, processing guidelines and other requirements. Guardian makes no guarantee that any glazing modeled herein is
available from Guardian or any other manufacturer. The user has the responsibility to check with the manufacturer regarding
availability of any glass type or make-up.

While Guardian has made a good faith effort to verify the reliability of the tools used for this analysis, they may contain
unknown programming errors that could result in inaccurate results. The user assumes all risk relating to the results provided
and is solely responsible for selection of appropriate products for user's application. Guardian makes no express or implied
warranty of any kind with respect to the tools used by Guardian and this analysis. There are no warranties of merchantability,
non-infringement or fitness for a particular purpose with respect to the tools used by Guardian and this analysis and no
warranty shall be implied by operation of law or otherwise. The only warranties applicable to Guardian products are those
separately provided in writing for each product. In no event shall Guardian be liable for direct, indirect, special, consequential
or incidental damages of any kind relating to or resulting from use of Guardian tools and analyses.

Trademarks owned by Guardian Industries, LLC and/or its affiliates may be registered in the United States and other
jurisdictions. All other trademarks are property of their respective owners.

By accessing this calculator, you agree not to alter or modify the generated report data and information, by any means. Any
manual alteration will be your own responsibility and will annul all the content of the report.

Program Version: 4.1.0.9532


Database Version: 20221010

Page 3 of 3

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