A number of studies demonstrate widespread improvements in asthma patients’ health when a team of providers supplement primary and specialist health care with home assessments and reduction of home-based triggers. In-home education and environmental interventions can markedly improve patients’ quality of life, and often decrease medical encounters. The literature on the financial implications of these interventions is beginning to also make a compelling business case for the health sector to invest in home-based environmental interventions and education, targeted to patients whose asthma is not well-controlled.