NDLI: Thermal Performance of Unvented Attics in Hot-Dry Climates: Results From Building America

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Hendron, Robert Farrar-Nagy, Sara Anderson, Ren Reeves, Paul Hancock, Ed
Copyright Year	2003
Abstract	As unvented attics have become a more common design feature implemented by Building America partners in hot-dry climates of the United States, more attention has been focused on how this approach affects heating and cooling energy consumption. By eliminating the ridge and eave vents that circulate outside air through the attic in most new houses and by moving the insulation from the attic floor to the underside of the roof, an unvented attic becomes a semiconditioned space, creating a more benign environment for space conditioning ducts. An energy trade-off is made, however, because the additional surface area (and perhaps reduced insulation thickness) increases the building loss coefficient. Other advantages and disadvantages, unrelated to energy, must also be considered. This paper addresses the energy-related effects of unvented attics in hot-dry climates based on field testing and analysis conducted by the National Renewable Energy Laboratory.
Sponsorship	Solar Energy Division
Starting Page	73
Ending Page	80
Page Count	8
File Format	PDF
ISBN	0791836762
DOI	10.1115/ISEC2003-44070
e-ISBN	0791836649
Volume Number	Solar Energy
Conference Proceedings	ASME 2003 International Solar Energy Conference
Language	English
Publisher Date	2003-03-15
Publisher Place	Kohala Coast, Hawaii, USA
Access Restriction	Subscribed
Subject Keyword	Design Insulation Energy consumption Climate Renewable energy Ducts Vents Tradeoffs Roofs Heating and cooling Testing
Content Type	Text
Resource Type	Article

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