Data from: Mechanical ventilation and indoor air quality in recently constructed homes in the humid climate of the southeast U.S.

This study is part of the Building American Ventilation and Indoor Air
Quality (BAVIAQ) field study. This study examines whole-house mechanical
ventilation (WHMV) and indoor air quality (IAQ) in 51 single-family homes
constructed since 2013 in the humid southeastern U.S in Florida, South
Carolina, and Georgia. A total of 67 weeks of data were collected from
homes monitored over one or two weeks, with whole-house mechanical
ventilation (WHMV) systems either operated or not. Eleven homes were
monitored under both WHMV conditions. The dataset includes time-resolved
measurements of CO₂, PM2.5, formaldehyde, and radon; and time-integrated
measurements of gravimetric PM2.5, NO₂, NOₓ, and formaldehyde. Occupants’
activities, including ventilation equipment usage, cooking, window
opening, and other usage related to IAQ, were also monitored. Participants
were asked to provide the household characteristics, their practices
related to ventilation and pollutant sources and controls, and their
satisfaction with air quality, thermal comfort, and other environmental
factors in the home. Building envelope and duct leakage, and mechanical
ventilation airflows were measured. WHMV system type, control, labeling,
operational status, and ASHRAE 62.2–2010 compliance were documented. The
dataset supports research on IAQ impacts of WHMV systems, building
performance gaps, occupant behavior, and pollutant exposure in
energy-efficient residential buildings. It enables paired comparisons
under controlled conditions and provides a foundation for evaluating
compliance with ventilation standards and their effects on indoor
pollutant levels.