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Author : ESCO PRESS
Publisher :
ISBN 13 : 9781930044241
Total Pages : 40 pages
Book Rating : 4.0/5 (442 download)
Download or read book Duct and Envelope Tightness written by ESCO PRESS and published by . This book was released on 2012-09-21 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Erik Rasmussen
Publisher : ESCO Press
ISBN 13 : 1930044542
Total Pages : 86 pages
Book Rating : 4.9/5 (3 download)
Download or read book Duct and Envelope Testing written by Erik Rasmussen and published by ESCO Press. This book was released on 2015-01-01 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: To comply with the International Energy Code, most states now require duct testing for both new construction and retrofit. Duct and Envelope Testing provides an in-depth understanding of envelope and duct leakage testing procedures, methods of expressing results, and terminology. This five-section manual provides an understanding of the terminology and building science affecting energy efficiency. The tools and testing procedures used to evaluate a building's envelope and duct systems are covered in detail. The manual provides the methods for expressing and recording envelope or duct leakage test results and explains what the numbers mean to the home owner and local code officials. The manual contains a worksheet for each section.
Author : John Diem
Publisher : ESCO Press
ISBN 13 : 1930044380
Total Pages : 82 pages
Book Rating : 4.9/5 (3 download)
Download or read book Duct Leakage Testing written by John Diem and published by ESCO Press. This book was released on 2015-05-01 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: To comply with the International Energy Code, most states now require duct testing for both new construction and retrofit. Duct leakage testing provides an in-depth understanding of duct leakage testing procedures, methods of expressing results, and terminology. Building Science is the study of a building's interaction between the structure and its components. A structure's occupants, mechanical systems, and the surrounding outdoor environment all play a role in the performance of a building. Duct Leakage Testing covers: * Duct leakage testing methods or total leakage. * Leakage to the outside using a duct pressurization tester. * Modified blower door subtraction methods.
Author :
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (684 download)
Download or read book Reducing Uncertainty for the DeltaQ Duct Leakage Test written by and published by . This book was released on 2004 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermal distribution system couples the HVAC components to the building envelope, and shares many properties of the buildings envelope including moisture, conduction and most especially air leakage performance. Duct leakage has a strong influence on air flow rates through building envelopes (usually resulting in much greater flows than those due to natural infiltration) because unbalanced duct air flows and leaks result in building pressurization and depressurization. As a tool to estimate this effect, the DeltaQ duct leakage test has been developed over the past several years as an improvement to existing duct pressurization tests. It focuses on measuring the air leakage flows to outside at operating conditions that are required for envelope infiltration impacts and energy loss calculations for duct systems. The DeltaQ test builds on the standard envelope tightness blower door measurement techniques by repeating the tests with the system air handler off and on. The DeltaQ test requires several assumptions to be made about duct leakage and its interaction with the duct system and building envelope in order to convert the blower door results into duct leakage at system operating conditions. This study examined improvements to the DeltaQ test that account for some of these assumptions using a duct system and building envelope in a test laboratory. The laboratory measurements used a purpose-built test chamber coupled to a duct system typical of forced air systems in US homes. Special duct leaks with controlled air-flow were designed and installed into an airtight duct system. This test apparatus allowed the systematic variation of the duct and envelope leakage and accurate measurement of the duct leakage flows for comparison to DeltaQ test results. This paper will discuss the laboratory test apparatus design, construction and operation, the various analysis techniques applied to the calculation procedure and present estimates of uncertainty in measured duct leakage.
Author :
Publisher :
ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (683 download)
Download or read book Sensitivity of the House Pressure Test for Duct Leakage to Variations in the Distribution of Air Leakage in the House Envelope written by and published by . This book was released on 1998 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: The house pressure test for air leakage in ducts calculates the signed difference between the supply and return leakage from the response of the air pressure in the house to operation of the system fan. The currently accepted version of this calculation was based on particular assumptions about how the house envelope leakage is distributed between the walls, ceiling, and floor. This report generalizes the equation to account for an arbitrary distribution of envelope leakage. It concludes that the currently accepted equation is usually accurate to within "5%, but in a small proportion of cases the results may diverge by 50% or more.
Author : Smacna
Publisher :
ISBN 13 : 9781617210273
Total Pages : 0 pages
Book Rating : 4.2/5 (12 download)
Download or read book HVAC Air Duct Leakage Test Manual 2nd Ed written by Smacna and published by . This book was released on 2012-01-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hank Rutkowski
Publisher : ACCA
ISBN 13 : 1892765357
Total Pages : 573 pages
Book Rating : 4.8/5 (927 download)
Download or read book Manual J - Residential Load Calculation written by Hank Rutkowski and published by ACCA. This book was released on 2011-11-01 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manual J 8th Edition is the national ANSI-recognized standard for producing HVAC equipment sizing loads for single-family detached homes, small multi-unit structures, condominiums, town houses, and manufactured homes. This new version incorporates the complete Abridged Edition of Manual J. The manual provides quick supplemental details as well as supporting reference tables and appendices. A proper load calculation, performed in accordance with the Manual J 8th Edition procedure, is required by national building codes and most state and local jurisdictions.
Author :
Publisher :
ISBN 13 :
Total Pages : 71 pages
Book Rating : 4.:/5 (684 download)
Download or read book Leakage Diagnostics, Sealant Longevity, Sizing and Technology Transfer in Residential Thermal Distribution Systems written by and published by . This book was released on 1998 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: This field study concentrated on measurement of duct leakage to outside the conditioned space because this is most useful in energy calculations. For room by room load/comfort requirements, the total duct leakage (including leaks to conditioned space) is more appropriate, particularly for additional comfort considerations. The objective of this field study is to help to identify major sources of uncertainty and to quantify the trade offs between different test methods. The identification of the areas requiring significant improvement will aid in future development of duct leakage test methods. For example, during the course of this study a new method for correcting house pressure tests to account for the presence of duct leakage in measured envelope leakage was developed. Each of the measurement techniques investigated has resulted from a different set of priorities and hence compromises. Thus each one of them is measuring a different physical quantity, although they all report the same parameter; duct leakage to outside at operating conditions. Given that real houses do not meet all of the simplifying assumptions that must be made to achieve similarity, the same numbers from each test method are not expected. Potentially these differences can be quite large and one of the benefits of field measurement is that the differences in the measurements helps put a realistic bound on how different some of these leakage diagnostics may be.
Author : Joe Loyer
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.:/5 (318 download)
Download or read book Alternative Procedure to Home Energy Rating System Rater Nonresidential Duct Leakage Test Verification written by Joe Loyer and published by . This book was released on 2017 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Armando Casillas
Publisher :
ISBN 13 : 9781392473306
Total Pages : pages
Book Rating : 4.4/5 (733 download)
Download or read book Building Leakage Diagnosis Using IoT Enabled MEMS Sensors written by Armando Casillas and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Building envelope and duct leakage are leading contributors to thermal losses and increased fan power in buildings and Heating, Ventilation and Air Conditioning (HVAC) systems. Codes established by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), and the International Energy Conservation Code (IECC) for air tightness are intended to address these inefficiencies through air-tightness performance requirements. The time, labor, and disruption of standardized tests based upon fan pressurization limits their use as tools to promote energy efficiency or air flow control. As a result, performance of standardized testing on commercial buildings is quite limited. A new method that determines building-specific envelope and duct leakage with minimal disruption to normal building operations has been identified. The methodology utilizes an array of Micro Electro-Mechanical Systems (MEMS) absolute pressure, temperature and humidity sensors placed at key building and ductwork locations, and makes use of mass/species conservation and flow characterization equations. The "MEMS protocol" was applied to a dataset aggregated from a series of controlled tests performed over a 3-month period in a building on the UC Davis campus. In this application, sensors transmitted differential pressure, relative humidity and temperature to the cloud on a 5-second basis. The influence of ambient conditions on the accuracy and stability of the pressure transducers was also studied in lab testing. In the field, the building's thermostats were programmed to create test patterns that pressurized the building space and generated air moisture differences. Temperatures and absolute humidity were used as tracers to calculate changes in energy and water content in the air between zones to estimate duct leakage. A comparison with standardized testing indicated that this method was able to estimate envelope leakage to within 10% of the standardized test result, and to within 17% of the standardized test result for duct leakage as a percentage of total fan flow. In addition, the building leakage was found to be 55% higher than current air-tightness standards set by the United States Army Corps of Engineers (USACE).
Author : Heinz R. Trechsel
Publisher : ASTM International
ISBN 13 : 0803104693
Total Pages : 445 pages
Book Rating : 4.8/5 (31 download)
Download or read book Measured Air Leakage of Buildings written by Heinz R. Trechsel and published by ASTM International. This book was released on 1986 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HVAC Air Duct Leakage Test Manual written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (727 download)
Download or read book Residential Air-distribution Systems written by and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residential air distribution systems, used both for heating and cooling and less commonly for ventilation, have important interactions with the building envelope. These systems can either be enclosed within the envelope or pass outside the envelope (in which case they represent an extension of the envelope). This paper addresses the three major types of interaction between air distribution systems that pass outside the envelope and single-family buildings: (1) duct leakage and duct conduction when the distribution fan is off, which act like a thermal bridge in the envelope; (2) duct leakage during system operation, which creates large changes in the quantity and location of air infiltration and exfiltration through the envelope; and (3) supply/return flow imbalances within individual zones during fan operation, which create elevated envelope pressure differentials, infiltration rates, and exfiltration rates. A simulation tool that was developed to take into account all of these interactions is presented and applied. The simulation tool, based upon the DOE-2 thermal simulation model, a multi-zone airflow network model (COMIS), and an equipment model for the ducts, is used to examine the magnitude of all three interactions. The interaction issues examined include air infiltration/exfiltration magnitude and location, overall thermal exchange when the system is off, and air exchange when the system is operating, with and without internal doors closed. The most surprising result of the analyses presented was that the thermal siphon effect for perfectly sealed ducts was shown to have an impact on the heat exchange between the house and unconditioned spaces that can be more than four times larger than that due to typical duct leakage when the fan is not in operation. This result suggests that this issue merits more careful examination than it has received in the past.
Author : Judy Alice Roberson
Publisher :
ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.:/5 (34 download)
Download or read book Effect of Building Airtightness and Fan Size on the Performance of Mechanical Ventilation Systems in New U.S. Houses written by Judy Alice Roberson and published by . This book was released on 2004 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sheet Metal and Air Conditioning Contractors' National Association (U.S.)
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (134 download)
Download or read book HVAC Air Duct Leakage Test Manual written by Sheet Metal and Air Conditioning Contractors' National Association (U.S.) and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alejandro Zaera-Polo
Publisher : Actar D, Inc.
ISBN 13 : 163840948X
Total Pages : 498 pages
Book Rating : 4.6/5 (384 download)
Download or read book The Ecologies of the Building Envelope written by Alejandro Zaera-Polo and published by Actar D, Inc.. This book was released on 2021-05-11 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ecologies of the Envelope theorizes the building envelope as a literal embodiment of the social, political, technological, and economic contingencies which have become embedded within it over the last century, analyzing the historical lineages, heroes and villains that helped define the complex material ecologies we see within the envelope today. While the façade is one of the most thoroughly theorized elements of architecture, it is also one of the most questioned since the end of the 19th century. Within the discipline of architecture, the traditional understanding of the façade focuses primarily on semiotic and compositional operations (such as proportional laws and linguistic codes), which are deployed on the building's surface. In contrast to this, our material and environmental theory of the envelope proposes that the exponential development of building technologies since the mid-19th century, coupled with new techniques of management and regulation, have diminished the compositional and ornamental capacities of the envelope in favor of material, quantitative, and technical performances. Rather than producing a stylistic analysis of the façade, we investigate the historical lineages of the performances, components, assembly types, and material entanglements that constitute the contemporary building envelope.
Author : Mat Santamouris
Publisher : Routledge
ISBN 13 : 1136570721
Total Pages : 332 pages
Book Rating : 4.1/5 (365 download)
Download or read book Building Ventilation written by Mat Santamouris and published by Routledge. This book was released on 2006-06-01 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ensuring optimum ventilation performance is a vital part of building design. Prepared by recognized experts from Europe and the US, and published in association with the International Energy Agency's Air Infiltration and Ventilation Centre (AIVC), this authoritative work provides organized, classified and evaluated information on advances in the key areas of building ventilation, relevant to all building types. Complexities in airflow behaviour, climatic influences, occupancy patterns and pollutant emission characteristics make selecting the most appropriate ventilation strategy especially difficult. Recognizing such complexities, the editors bring together expertise on each key issue. From components to computer tools, this book offers detailed coverage on design, analysis and performance, and is an important and comprehensive publication in this field. Building Ventilation will be an invaluable reference for professionals in the building services industry, architects, researchers (including postgraduate students) studying building service engineering and HVAC, and anyone with a role in energy-efficient building design.
