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Title: Truss-Integrated Thermoformed Ductwork Final Technical Report

Abstract

This report summarizes a multi-year research effort to develop a leak-free duct system that can be readily installed within the thermal envelope. There are numerous efforts underway to improve duct system efficiency. Most of these involve modifications to current technology such as air sealing techniques like mastic and aeroseal, snap together duct connections, and greater levels of insulation. This project sought to make a more significant stride forward by introducing a duct system of a material that can be more readily sealed and can exhibit lower friction losses. The research focused on the use of smooth internal surface, low friction plastic ducts that could be easily installed with very low air leakage. The initial system concept that was proposed and researched in Phase I focused on the use of thermoformed plastic ducts installed in a recessed roof truss underneath the attic insulation. A bench top thermoformed system was developed and tested during Phase I of the project. In Phase II, a first generation duct system utilizing a resin impregnated fiberglass duct product was designed and specified. The system was installed and tested in an Atlanta area home. Following this installation research and correspondence with code officials was undertaken to alleviatemore » the continued concern over the code acceptance of plastic ducts in above ground applications. A Committee Interpretation response was received from the International Code Council (ICC) stating that plastic ducts were allowed, but must be manufactured from materials complying with Class 0 or Class 1 rating. With assurance of code acceptance, a plastic duct system using rotomolded high density polyethylene ducts that had passed the material test requirements by impregnating the material with a fire retardant during the molding process was installed in the basement of a new ranch-style home in Madison, WI. A series of measurements to evaluate the performance benefits relative to a similar control house with a standard sheet metal installation were made.« less

Authors:
; ;
Publication Date:
Research Org.:
Steven Winter Associates, Inc.
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); US - Atomic Energy Commission
OSTI Identifier:
913241
Report Number(s):
Final Technical Report
Amendment No. M009; TRN: US201001%%567
DOE Contract Number:  
FG02-01ER83325
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ATTICS; BASEMENTS; DUCTS; EFFICIENCY; FIBERGLASS; FRICTION; MODIFICATIONS; MOLDING; PERFORMANCE; PLASTICS; POLYETHYLENES; RESINS; ROOFS; residential HVAC, ducts, air distribution

Citation Formats

Winter, Steven, Griffiths, Dianne, and Gorthala, Ravi. Truss-Integrated Thermoformed Ductwork Final Technical Report. United States: N. p., 2007. Web. doi:10.2172/913241.
Winter, Steven, Griffiths, Dianne, & Gorthala, Ravi. Truss-Integrated Thermoformed Ductwork Final Technical Report. United States. https://doi.org/10.2172/913241
Winter, Steven, Griffiths, Dianne, and Gorthala, Ravi. 2007. "Truss-Integrated Thermoformed Ductwork Final Technical Report". United States. https://doi.org/10.2172/913241. https://www.osti.gov/servlets/purl/913241.
@article{osti_913241,
title = {Truss-Integrated Thermoformed Ductwork Final Technical Report},
author = {Winter, Steven and Griffiths, Dianne and Gorthala, Ravi},
abstractNote = {This report summarizes a multi-year research effort to develop a leak-free duct system that can be readily installed within the thermal envelope. There are numerous efforts underway to improve duct system efficiency. Most of these involve modifications to current technology such as air sealing techniques like mastic and aeroseal, snap together duct connections, and greater levels of insulation. This project sought to make a more significant stride forward by introducing a duct system of a material that can be more readily sealed and can exhibit lower friction losses. The research focused on the use of smooth internal surface, low friction plastic ducts that could be easily installed with very low air leakage. The initial system concept that was proposed and researched in Phase I focused on the use of thermoformed plastic ducts installed in a recessed roof truss underneath the attic insulation. A bench top thermoformed system was developed and tested during Phase I of the project. In Phase II, a first generation duct system utilizing a resin impregnated fiberglass duct product was designed and specified. The system was installed and tested in an Atlanta area home. Following this installation research and correspondence with code officials was undertaken to alleviate the continued concern over the code acceptance of plastic ducts in above ground applications. A Committee Interpretation response was received from the International Code Council (ICC) stating that plastic ducts were allowed, but must be manufactured from materials complying with Class 0 or Class 1 rating. With assurance of code acceptance, a plastic duct system using rotomolded high density polyethylene ducts that had passed the material test requirements by impregnating the material with a fire retardant during the molding process was installed in the basement of a new ranch-style home in Madison, WI. A series of measurements to evaluate the performance benefits relative to a similar control house with a standard sheet metal installation were made.},
doi = {10.2172/913241},
url = {https://www.osti.gov/biblio/913241}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Aug 30 00:00:00 EDT 2007},
month = {Thu Aug 30 00:00:00 EDT 2007}
}