Ventilation and Air Quality in New California Homes with Gas Appliances and Mechanical Ventilation PDF Download
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Author: Wanyu R. Chan
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 94
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Book Description
Author: Wanyu R. Chan
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 94
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Book Description
Author:
Publisher:
ISBN:
Category : Dwellings
Languages : en
Pages : 240
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
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Book Description
Today's high performance green homes are reaching previously unheard of levels of airtightness and are using new materials, technologies and strategies, whose impacts on Indoor Air Quality (IAQ) cannot be fully anticipated from prior studies. This research study used pollutant measurements, home inspections, diagnostic testing and occupant surveys to assess IAQ in 24 new or deeply retrofitted homes designed to be high performance green buildings in California. Although the mechanically vented homes were six times as airtight as non-mechanically ventilated homes (medians of 1.1 and 6.1 ACH50, n=11 and n=8, respectively), their use of mechanical ventilation systems and possibly window operation meant their median air exchange rates were almost the same (0.30 versus 0.32 hr-1, n=8 and n=8, respectively). Pollutant levels were also similar in vented and unvented homes. These similarities were achieved despite numerous observed faults in complex mechanical ventilation systems. More rigorous commissioning is still recommended. Cooking exhaust systems were used inconsistently and several suffered from design flaws. Failure to follow best practices led to IAQ problems in some cases. Ambient nitrogen dioxide standards were exceeded or nearly so in four homes that either used gas ranges with standing pilots, or in Passive House-style homes that used gas cooking burners without venting range hoods. Homes without active particle filtration had particle count concentrations approximately double those in homes with enhanced filtration. The majority of homes reported using low-emitting materials; consistent with this, formaldehyde levels were approximately half those in conventional, new CA homes built before 2008. Emissions of ultrafine particles (with diameters
Author:
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Category :
Languages : en
Pages :
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Intake of chemical air pollutants in residences represents an important and substantial health hazard. Sealing homes to reduce air infiltration can save space conditioning energy, but can also increase indoor pollutant concentrations. Mechanical ventilation ensures a minimum amount of outdoor airflow that helps reduce concentrations of indoor emitted pollutants while requiring some energy for fan(s) and thermal conditioning of the added airflow. This work demonstrates a physics based, data driven modeling framework for comparing the costs and benefits of whole-house mechanical ventilation and applied the framework to new California homes. The results indicate that, on a population basis, the health benefits from reduced exposure to indoor pollutants in New California homes are worth the energy costs of adding mechanical ventilation as specified by ASHRAE Standard 62.2. This study determines the health burden for a subset of pollutants in indoor air and the costs and benefits of ASHRAE's mechanical ventilation standard (62.2) for new California homes. Results indicate that, on a population basis, the health benefits of new home mechanical ventilation justify the energy costs.
Author: Max H. Sherman
Publisher:
ISBN:
Category : Dwellings
Languages : en
Pages : 112
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Author:
Publisher:
ISBN:
Category : Air quality
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Air quality
Languages : en
Pages : 40
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Author: Charles Nehme
Publisher: Charles Nehme
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 42
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Book Description
Ventilation is an indispensable aspect of our built environment, yet it often operates quietly in the background, unseen and unheard. It is the invisible force that breathes life into our homes, workplaces, and public spaces, influencing our health, comfort, and overall well-being. The quality of the air we breathe indoors profoundly affects our lives, from our ability to concentrate and be productive to our susceptibility to illnesses and allergies. This book delves into the world of ventilation, unveiling its significance, principles, and applications across diverse settings. Whether you are a homeowner seeking to enhance indoor air quality, an architect striving to create sustainable buildings, or an engineer working on cutting-edge ventilation technologies, this book is a comprehensive guide to understanding, implementing, and optimizing ventilation systems. Ventilation is not a static field; it evolves in response to advancing technologies, changing environmental concerns, and the pursuit of healthier, more efficient indoor environments. In each chapter, we explore different facets of ventilation, from its role in mitigating the spread of respiratory diseases like COVID-19 to its pivotal role in green building practices aimed at reducing our carbon footprint. As we navigate the intricate world of ventilation, we emphasize best practices, emerging trends, and innovative solutions that are shaping the future of indoor environments. Whether you are seeking practical advice for improving ventilation in your home, insights into sustainable building design, or a glimpse into the technologies that will revolutionize the field, this book equips you with the knowledge to make informed decisions and contribute to creating spaces that prioritize health, comfort, and environmental responsibility. In our exploration of ventilation, we aim to illuminate the importance of this often-overlooked aspect of our daily lives. By understanding its principles and embracing best practices, we can breathe easier, work more productively, and live healthier lives in the spaces we call home, work, and play. We invite you to embark on this journey through the world of ventilation, and we hope you find the insights and knowledge within these pages both enlightening and empowering. Sincerely, Charles nehme
Author: Paul Raymer
Publisher: McGraw Hill Professional
ISBN: 0071625283
Category : Technology & Engineering
Languages : en
Pages : 385
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Book Description
Mold, radon, and poor indoor air quality have made it into the news and into home insurance policies and builders' liability insurance
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
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The Healthy Efficient New Gas Homes (HENGH) is a field study that will collect data on ventilation systems and indoor air quality (IAQ) in new California homes that were built to 2008 Title 24 standards. A pilot test was performed to help inform the most time and cost effective approaches to measuring IAQ in the 100 test homes that will be recruited for this study. Two occupied, single-family detached homes built to 2008 Title 24 participated in the pilot test. One of the test homes uses exhaust-only ventilation provided by a continuous exhaust fan in the laundry room. The other home uses supply air for ventilation. Measurements of IAQ were collected for two weeks. Time-resolved concentrations of particulate matter (PM), nitrogen dioxide (NO2), carbon dioxide (CO2), carbon monoxide (CO), and formaldehyde were measured. Measurements of IAQ also included time-integrated concentrations of volatile organic compounds (VOCs), volatile aldehydes, and NO2. Three perfluorocarbon tracers (PFTs) were used to estimate the dilution rate of an indoor emitted air contaminant in the two pilot test homes. Diagnostic tests were performed to measure envelope air leakage, duct leakage, and airflow of range hood, exhaust fans, and clothes dryer vent when accessible. Occupant activities, such as cooking, use of range hood and exhaust fans, were monitored using various data loggers. This document describes results of the pilot test.
