Download Indoor Air Quality Guide - Best Practices for Design, by American Society of Heating Refrigerating and PDF

By American Society of Heating Refrigerating and Air-Conditioning Engineers

This advisor, as a result of a collaborative attempt of six top enterprises within the construction neighborhood and written by means of a committee of a few of the main skilled contributors within the box of indoor air caliber (IAQ), offers top practices for layout, building, and commissioning that experience confirmed winning in different construction initiatives. It offers info and instruments architects and layout engineers can use to accomplish an IAQ-sensitive development that integrates IAQ into the layout and building strategy besides different layout ambitions, price range constraints, and sensible necessities. whereas a few key matters within the box of IAQ stay unresolved, this rfile provides the easiest to be had details to permit practitioners to make proficient judgements for his or her construction tasks. The consultant addresses the economic and institutional constructions lined by means of ASHRAE general 62.1.
Content:
entrance topic
• Abbreviations and Acronyms
• Message to development vendors
advent
• desk of Contents
•Part I. precis Guidance
• evaluate info for layout, development, and Commissioning for IAQ
target 1. deal with the layout and development strategy to accomplish strong IAQ
aim 2. regulate Moisture in development Assemblies
goal three. restrict access of out of doors Contaminants
goal four. keep watch over Moisture and Contaminants on the topic of Mechanical platforms
target five. restrict Contaminants from Indoor resources
target 6. seize and Exhaust Contaminants from development gear and actions
goal 7. lessen Contaminant Concentrations via air flow, Filtration, and Air cleansing
aim eight. observe extra complicated air flow methods
• half I References and Bibliography
•Part II. particular Guidance
• specific details for layout, building, and Commissioning for IAQ
target 1. deal with the layout and development method to accomplish sturdy IAQ
goal 2. keep watch over Moisture in construction Assemblies
goal three. restrict access of outside Contaminants
target four. regulate Moisture and Contaminants on the topic of Mechanical structures
goal five. restrict Contaminants from Indoor resources
target 6. catch and Exhaust Contaminants from development apparatus and actions
aim 7. lessen Contaminant Concentrations via air flow, Filtration, and Air cleansing
target eight. follow extra complicated air flow ways
Appendices

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Additional resources for Indoor Air Quality Guide - Best Practices for Design, Construction, and Commissioning

Sample text

1-E Damage from Failure of the Roof Flashing Termination Photographs copyright Liberty Building Forensics Group®. 28 This file is licensed personally to you for use at your computer. Distribution to others prohibited Limit Condensation of Water Vapor within the Building Envelope and on Interior Surfaces The moisture content of building materials increases due to water vapor transport across enclosure assemblies either due to infiltrating, exfiltrating, or convecting air in contact with surfaces that have a temperature lower than the dew point of the air coming in contact with the surface and/or by diffusion due to a difference in water vapor pressure across the assembly or by capillary transport through the microscopic voids in building materials.

Thermal bridges in the form of highly conductive materials that penetrate the insulated enclosure can drop temperatures of indoor surfaces to levels promoting condensation. Properly designed enclosure assemblies that have greater drying potential than wetting potential and that achieve a moisture balance over time are not always implemented, and many building designs do not get scrutinized for appropriate enclosure design. Introduction Designing for Airtightness • Air Barrier Design Requirements Air Pressures that Cause Infiltration and Exfiltration • Wind Pressure • Stack Pressure • HVAC Fan Pressure Air Barrier Systems • Continuity • Structural Support • Air Impermeability • Durability • Air Barrier System Requirements • Air Barrier Materials • Air Barriers Subject to Temperature Changes • Roof Air Barriers Controlling Convection in Enclosure Assemblies Controlling Condensation due to Diffusion Recommendations for Building Enclosures References and Bibliography Building enclosures are often designed without a proper understanding of the performance of the assembly when it is subjected to the exterior weather and interior boundary conditions.

The drywall in this project was installed after exposure to the elements. Before installation, the drywall had been stored outside and exposed to the weather and not properly protected. This allowed for moisture to invade the drywall and create an opportunity for microbial growth. 4 This file is licensed personally to you for use at your computer. Distribution to others prohibited Facilitate Effective Operation and Maintenance for IAQ • Consider the owner’s expected level of O&M capability when selecting systems.

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