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Performance and finishes • Insulation factors <br />320 • • Technical data manual • Book Rev. 08/30/17 • Page Rev. 04/30/08 <br />Insulation factors <br />General information <br />Exterior doors are often used to block the transmission of <br />temperature from one side to the other. Energy lost through a <br />door opening is the result of both: <br />• Thermal transmission, through the door assembly, is <br />stated as either the U-Factor or the R-Factor. These factors <br />are covered on this page. <br />• Air infiltration, around the perimeter of the door, is stated <br />as air leakage in CFM. This rating is covered on Page 2 of <br />this sheet. <br />Thermal tests <br />Doors are tested in accordance with ASTM C1363 and SDI 113. <br />The door assembly (or door only) is subjected to heat with the <br />amount of loss measured. <br />Honeycomb core doors provide insulation through the small air <br />pockets created by the hexagonal cells. The insulation of the <br />honeycomb core is far better than a solid core wood door, <br />insulated glass and concrete block walls. Polystyrene and <br />polyurethane core doors are recommended where extreme <br />temperature variations are prevalent. <br />Thermal factors <br />The following terms are used to describe thermal transmission <br />through building products: <br />• U-Factor: Overall co-efficient of heat transmission passage <br />through a built-up panel section. Technically, it is heat <br />transmission in BTU per hour per square foot per degree <br />Fahrenheit of temperature difference from air to air for a <br />complete panel sectional (the lower the U-factor, the better <br />the insulation). <br />• R-Factor: Thermal resistance is a measure of ability to <br />retard heat flow. R is an expression of the total resistance to <br />heat flow through a complete panel section or construction <br />assembly. R represents a value of the thermal resistance, <br />per hour per square foot of a typical panel section. R is the <br />numerical reciprocal of the U-factor (the higher the R, the <br />higher the insulating value). <br />• K-Thermal: Conductivity (K) is the amount of heat that <br />passes through a homogenous material one inch thick and <br />one square foot in area per hour. Values of K are expressed <br />in BTU per hour (the lower the K, the higher the insulating <br />value). The K unit is for a single component material one <br />inch thick and one square foot in area. Therefore, it does not <br />apply to a 1-3⁄4" thick door panel consisting of several <br />materials. (Conductivity is not a method of measuring heat <br />transmission through built up panels.) <br />Thermal performance test results per SDI 113-01 <br />Door series Core Tests per ASTM C1363 U-Factor Tests per ASTM C1363 R-Factor <br />B18 Series Steel Stiffeners 0.50 2.01 <br />B16 Series Steel Stiffeners 0.53 1.89 <br />L18 Series Honeycomb 0.56 1.80 <br />L18 Series Polystyrene 0.38 2.64 <br />L18 Series Polyurethane 0.36 2.81 <br />L16 Series Honeycomb 0.57 1.74 <br />L16 Series Polystyrene 0.39 2.54 <br />L16 Series Polyurethane 0.38 2.67 <br />CE18 Series Polystyrene 0.41 2.44 <br />H16 Series Honeycomb 0.60 1.67 <br />H16 Series Polystyrene 0.42 2.36 <br />A14 Series Honeycomb 0.78 1.28 <br />Note: Corrected to ASHRAE winter design with 15 mph wind outside, still air inside. <br />Historical statement <br />Historically, SDI 113 required thermal transmission testing in accordance with ASTM C236-89(1993) “Standard Test Method for <br />Steady-State Thermal Performance of Building Assemblies by Means of a Guarded Hot Box”. In 2001ASTM C236-89(1993) was <br />withdrawn as an ASTM standard. SDI 113-01 was subsequently revised to require testing in accordance with ASTM C1363-05 <br />“Standard Test Method for Thermal Performance of Building Materials and Envelope Assemblies by Means of a Hot Box Apparatus”. <br />This change in test methods results in significant changes in performance values which are not comparable between the current <br />standard ASTM C1363 and the old standard ASTM C236. Architectural specifications must be carefully reviewed for compliance <br />with the appropriate standard.General InformationFramesDoorsLights and LouversElevationsHurricaneSpecialtyHardwareFire Rated ProductsPerformanceArchitecturalVariationsVariationsTornadoHome <br />DocuSign Envelope ID: 97A9508F-537F-4A89-96AD-A82F9ABD3708