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The scope covers rectangular ducts designed to operate at 1/2 in. w.g. (125 Pa) static pressure or less, defines limits for maximum unreinforced duct sizes, and addresses operating temperature and typical residential air velocities. It also describes compatible flexible duct installation techniques, notes that overall system design is outside scope, and references related NAIMA, ADC, and ACCA resources plus UL closure system requirements. The document outlines responsibilities, warranty disclaimers, revision basis, and adoption guidance.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/fibrous-glass-residential-duct-construction-standard-third-edition-preface/663223/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/fibrous-glass-residential-duct-construction-standard-third-edition-preface/663223.png","ImageObject",300,407,{"name":92,"@type":93},"awa","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-28",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What residential duct static pressure range does this standard cover?","Question",{"text":112,"@type":113},"The standard covers rectangular residential ducts designed to operate at 1/2\" w.g. (125 Pa) static pressure or less.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What temperature and velocity limits are referenced for fibrous glass duct products?",{"text":117,"@type":113},"Fibrous glass duct products are intended for internal air temperatures from not less than 40°F (4°C) to not greater than 250°F (121°C). Residential systems typically operate at air velocities of 1,200 feet per minute (6 m/sec) or less.",{"name":119,"@type":110,"acceptedAnswer":120},"Why does the standard reference UL 181A and related closure requirements?",{"text":121,"@type":113},"UL 181A incorporates key provisions of UL 181 and adds additional closure requirements, providing a basis for ensuring that properly applied closure systems perform under varied environmental conditions.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},663223,1793225867,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":144},3985747858093,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","􀀁 􀀃􀀄FBR LA RE DENTAL D T N T T N TANDARDI OUSG SS SI I UC CO S UC IO S   \nFIBROUS GLASS RESIDENTIAL DUCT CONSTRUCTION STANDARD  \nTHIRD EDITION, 2002  \nFABRICATION  \nAND INSTALLATION TECHNIQUES FOR THE RESIDENTIAL HVAC DUCT CONTRACTOR  \nCOPYRIGHT  c 2002, NAIMA, ALL RIGHTS RESERVED $10.00  \nFIBROUS GLASS RESIDENTIAL DUCT CONSTRUCTION STANDARD  \nLOW VELOCITY SYSTEMS  \n1/2\" w. g. (125 Pa) Maximum Static Pressure  \nTHIRD EDITION, 2002  \nFIBROUS GLASS RESIDENTIAL DUCT CONSTRUCTION STANDARD  \nPREFACE  \nThe North American Insulation Manufacturers Association (NAIMA) presents this Standard as a recommended method of fabricating and installing air transmission ducts in residential buildings using fibrous glass material as specified herein.  \nRectangular residential ducts covered by this Standard are designed to operate at 1/2\" w.g. (125 Pa) static pressure or less. Maximum unreinforced duct size covered by this Standard is 36”(900mm) for 475 and 800 EI board and 42”(1050mm) for 1400 EI board. For fabrication of rectangular ducts of larger sizes or for operation at greater static pressures, refer to NAIMA Publication AH116, Fibrous Glass Duct Construction Standard. Applicable portions of that Standard have been adapted for use by the residential fibrous glass duct contractor.  \nFibrous glass duct products are designed for use in comfort heating and cooling systems operating at internal air temperatures not less than 40oF (4oC) and not greater than 250oF (121oC) .  \nWhile fibrous glass duct board is rated at 2,400 feet per minute (12 m/sec) air velocity or greater, residential duct systems typically operate at velocities of 1,200 feet per minute (6 m/sec) or less.  \nFlexible duct installation techniques covered by this Standard are designed to complement rectangular, ten-sided, or round fibrous glass duct systems. More comprehensive information on the subject of flexible ducts may be found in the current edition of the Air Diffusion Council (ADC) publication, Flexible Duct Performance and Installation Standards.  \nOverall HVAC duct system design issues are beyond the scope of this Standard. However, if satisfactory duct system performance is to be achieved, it is important for the system designer to calculate HVAC loads on a room-by-room basis and to size ducts accordingly. It is recommended that industry information, such as Air Conditioning Contractors Association (ACCA) Manuals D (duct sizing) and J (load calculation), be consulted for guidance in these critical areas.  \nUnderwriters Laboratories Inc. Standard for Closure Systems for Use With Rigid Air Ducts and Air Connectors, UL 181A, incorporates key provisions of the UL 181 Standard, as well as additional provisions developed by NAIMA and various closure material manufacturers. The resultant standard provides the means for assuring the contractor and building owner that the selected closure system will, when properly applied, perform within varied environmental conditions.  \nThis Standard was developed using reliable engineering principles and research, plus consultation with and information obtained from manufacturers, contractors, testing laboratories, and others having specialized experience. They are subject to revision as further experience and investigation may show is necessary or desirable. Construction and products which comply with this Standard will not necessarily be acceptable if, when examined and tested, they are found to have other features which impair the result contemplated by these requirements. The North American Insulation Manufacturers Association assumes no responsibility and accepts no liability for the application of the principles or techniques contained in this Standard.  \nIn particular, NAIMA makes no warranty of any kind, express or implied, regarding merchantability or fitness for any particular purpose, in connection with the information supplied herein.  \nAuthorities considering adoption of this Standard should review all Federal, state, local and ","cbCaiqFOFMjRwyW1","https://ap.wps.com/l/cbCaiqFOFMjRwyW1","pdf",2680130,100,"English","# Preface\n# Contents\n# SECTION I. PERFORMANCE CRITERIA\n## Performance characteristics, fibrous glass duct board\n## Characteristics and limitations for residential systems\n## Performance characteristics, flexible duct\n## Installation check list","[{\"question\":\"What residential duct static pressure range does this standard cover?\",\"answer\":\"The standard covers rectangular residential ducts designed to operate at 1/2\\\" w.g. (125 Pa) static pressure or less.\"},{\"question\":\"What temperature and velocity limits are referenced for fibrous glass duct products?\",\"answer\":\"Fibrous glass duct products are intended for internal air temperatures from not less than 40°F (4°C) to not greater than 250°F (121°C). Residential systems typically operate at air velocities of 1,200 feet per minute (6 m/sec) or less.\"},{\"question\":\"Why does the standard reference UL 181A and related closure requirements?\",\"answer\":\"UL 181A incorporates key provisions of UL 181 and adds additional closure requirements, providing a basis for ensuring that properly applied closure systems perform under varied environmental conditions.\"}]","Fibrous Glass Residential Duct Construction Standard - Third Edition - Preface | PDF",252]