ASHRAE 62.2-2016 Ventilation and Acceptable Indoor Air Quality in Residential Buildings defines the roles of, and minimum requirements for, mechanical and natural ventilation systems and the building envelope intended to provide acceptable indoor air quality in low-rise residential buildings, defined as spaces intended for human occupancy within single-family houses and multifamily structures, including manufactured and modular houses. The standard includes three primary sets of requirements (whole-building ventilation, local demand-controlled exhaust, source control) and a number of secondary requirements that focus on properties of specific items needed to achieve the main objectives of the standard. The standard considers chemical, physical and biological contaminants that can affect air quality and does not address thermal comfort requirements, specific pollutant concentration levels or certain potential pollutant sources. Major scope changes in this edition include (i) adding unvented space heaters as a potential contaminant source and (ii) by expanding "covered dwellings" to include all multifamily dwelling units. Also includes a number of other significant changes such as a minimal calculated mechanical ventilation rate is provided for existing buildings, below which installation of whole-house ventilation is not required; a distinction is now made between range hoods and other kitchen ventilation options; new methods are provided for determining an infiltration credit for horizontally attached multifamily dwelling units and for determining requirements for a variety of noncontinuous ventilation strategies; and a maximum short-term relative exposure limit is implemented for the first time.
ANSI approved.
Softcover.
