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

This dataset was collected as part of the Building America Ventilation and
Indoor Air Quality (BAVIAQ) field study. The BAVIAQ study aimed to measure
indoor air quality (IAQ) parameters, characterize ventilation equipment
and other house and household characteristics, and actions that impact
IAQ, with a focus on the role of whole-house mechanical ventilation
(WHMV). This dataset was obtained from visits and monitoring in 32
single-family homes constructed since 2013 in the cool and humid climate
of Illinois. A total of 41 weeks of data were collected. These included
one week of data collection in each home under the “as-found” condition of
no WHMV, and a second week of data collection in nine homes, during which
an exhaust fan was operated to provide WHMV. The dataset includes
time-resolved measurements of CO2, PM2.5, formaldehyde, and radon at one
or multiple indoor locations, and time-integrated samples of gravimetric
PM2.5, NO2, NOx, and formaldehyde collected both indoors and outdoors.
Occupants’ activities, including ventilation equipment usage, cooking,
window opening, and other usage related to IAQ, were also monitored.
Participants also provided household characteristics, practices
influencing ventilation and pollutant sources, and self-reported
satisfaction with air quality, thermal comfort, and other environmental
factors. Building performance metrics were documented, including envelope
and duct leakage, mechanical ventilation airflow rates, WHMV system type,
controls, operational status, labeling, and compliance with ASHRAE
62.2–2010. The dataset can be used to support research on IAQ impacts of
WHMV systems, building performance, occupant behavior, and pollutant
exposure in recently constructed, energy-efficient homes. It enables
paired-condition comparisons, facilitates evaluation of ventilation
standard compliance, and provides a foundation for examining the
effectiveness of WHMV in reducing indoor pollutant levels.