The project measured indoor air pollutants in 70 new California homes with gas appliances. The measurements included PM2.5, formaldehyde, NO2, CO2, temperature and humidity. The measurements were made over one week and included samples both from outdoor and indoor locations for each home. The results show pollutants were at acceptable levels in the homes with ventilation systems operating, and the levels have generally decreased in new homes compared to those from previous studies. The results suggest the new proposed 2016 ventilation fan sizing for minimum air flow in Title 24 is a significant improvement over earlier methods. Results also suggest that occupants have limited awareness of their actions' affect on health-related air quality, such as using a range hood when cooking to minimize pollutants in the home. The final report will be available in Fall 2018. (Link: ___)
This project studied indoor air quality conditions after the implementation of building standards required mechanical ventilation in 2008. This project includes a two-tiered field study, analysis and modeling that extrapolate the field study results, and investigation of the changes in indoor air quality associated with further tightening of the building envelope. The field study gathered data directly from occupants and natural gas homes meeting or exceeding the 2008 standards. The study measured indoor air quality (IAQ) and characterized mechanical ventilation, and then used that data to provide recommendations to stakeholders, such as the Energy Commission and homeowners, on how to achieve adequate ventilation while reducing the energy associated with conditioning infiltration air.
Key Project Members
Institute of Gas Technology dba GTI Energy
Chitwood Energy Management
Wilson Environmental Associates
Southern California Gas Company (SoCalGas)