ASHRAE F27-2009 (SI)
Thermal and moisture design as well as long-term performance must be considered during the planning phase of buildings. Installing appropriate insulation layers and taking appropriate air and moisture control measures can be much more economical during construction than later. Design and material selection should be based on
- Building use Interior and exterior climate Space availability Thermal and moisture properties of materials Other properties required by location of materials Durability of materials Compatibility with adjacent materials Performance expectations of the assembly This chapter draws on Chapter 25s fundamental information on heat, air and moisture transport in building assemblies, as well as Chapter 26s material property data. Examples here demonstrate calculation of heat, moisture, and air transport in typical assemblies. For design guidance for common building envelope assemblies and conditions, see Chapter 43 of the 2007 ASHRAE HandbookHVAC Applications.Chapter Table of ContentsHEAT TRANSFER
One-Dimensional U-Factor Calculation
Two-Dimensional U-Factor Calculation
MOISTURE TRANSPORT
Wall or Roof with Insulated Sheathing
Vapor Pressure Profile (Glaser or Dew-Point) Analysis
TRANSIENT HYGROTHERMAL MODELING
AIR MOVEMENT ISBN: 978-1-933742-55-7
ISSN: 1523-7282Units: SICitation: 2009 ASHRAE Handbook -- Fundamentals: Chapter 27, Heat, Air, and Moisture Control in Building Assemblies--Examples
Product Code(s): D-F272009SI
