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NFRC 200

2014 Edition, 2014

Complete Document

Flexible Couplings - Nomenclature for Flexible Couplings

Includes all amendments and changes through Change/Amendment , 2014


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Description / Abstract:

Products and Effects Covered

The following products and effects are within the scope of NFRC 200 and shall be permitted to be rated in accordance with this procedure.

A. Products of all frame materials including (but not limited to) aluminum, steel, thermally broken aluminum, wood, vinyl, reinforced vinyl, fiberglass, and plastic, used independently or in combination;

B. Products of all operator or unit types including (but not limited to) vertical sliding windows, horizontal sliding windows, casement windows, projecting windows, fixed windows, non-standard shaped windows, glazed wall systems, glazings for site built fenestration products, bay or bow windows, skylights, and vehicular (garage/rolling) access doors (with or without glazed areas);

C. Single or multiple assemblies of exterior doors;

D. Products of any size;

E. Products of all glazing materials, tints, and types, including (but not limited to) clear glass, tinted glass, laminated glass, fritted glazing, etched glazing, sandblasted glazing, thin plastic films (internally suspended, internally applied, or externally applied), rigid plastics with or without any solar control, low-E, or any other partially transparent coating;

F. Products with any or no gap width between glazing layers;

G. Products with any gas-fill between glazing layers, including (but not limited to) air, argon, krypton, CO2, or mixes of these gases; H. Products with any spacer or spacer systems between glazings, including (but not limited to) metallic, non-metallic, or composite spacers; I. Products utilizing any and all glazing dividers, including (but not limited to) interior, exterior, or between glazing grilles, muntin bars, caming, true divided lites, simulated divided lites, or simulated caming bars; J. Products designed for installation at any tilt; K. Film attachment products that consist of a flexible adhesive-backed polymer film which may be applied to the interior or exterior surface of an existing glazing system in an installed fenestration product (i.e., as a retrofit, ‘field-installed,' or ‘daylight-installed'). [Note: Films factory-applied to glazing prior to fenestration product fabrication and installation are already covered as glazing options by NFRC 200 and shall not be rated according to the procedure of Section 5.7] L. Products utilizing shading or diffusing systems that are an integral part of the product as shipped from the manufacturer, including Dynamic Glazing Products; M. Dynamic Glazing Products, such as but not limited to electrochromic glazed products; and N. Dynamic Attachments for Swinging Door.

PURPOSE

To specify a method for calculating solar heat gain coefficient (SHGC) and visible transmittance (VT) at normal (perpendicular) incidence for fenestration products containing glazings or glazing with applied films, with specular optical properties calculated in accordance with ISO 15099 [8] (except where noted) or tested in accordance with NFRC 201 [2], NFRC 202 [3], and NFRC 203 [4].

[Note: This standard specifies a method for calculating the solar heat gain and visible transmittance from direct solar radiation through most fenestration products at normal incidence only. This procedure is limited to normal incidence calculations because solar optical data needed for such calculations is typically only available at normal incidence. While solar radiation rarely enters a fenestration product at normal incidence, SHGC and VT at near normal angles of incidence (less than 30o off normal) are typically very similar to those at normal incidence; for other angles, the SHGC and VT at normal can be used, to first order, as an indicator of the relative magnitude of solar heat gain (SHG) and VT.]