Most older homes in the United States lack adequate insulation and air sealing, according to ENERGY STAR. Air leaks drive up utility bills, and can cause discomfort from drafts and uneven temperatures. With rising energy costs, many California homeowners are air sealing and insulating their homes to keep heating and cooling costs down. Property assessed clean energy (PACE) is a means of finance energy-saving home improvement projects in California through property tax bills, making it affordable to many homeowners. Air sealing a home can, however, cause air quality issues to arise, increasing the importance of mechanical ventilation.
