Monthly Archives: May 2026

By the INDEX Editorial Team | Based on peer-reviewed research INDEX (Indoor Exposure Index) is a 501(c)(3) nonprofit focused on connecting everyday indoor problems to practical, science‑grounded solutions. We have no financial incentive to favor one brand over another; our…

The H4H model functions as a "force multiplier," using professionalization to solve the industry’s traditional labor hurdles. H4H Features 1. Pre-Qualification Require evidence-based training before hiring. Filters for motivated individuals; reduces turnover. 2. Wage Alignment Pay professional wages (e.g., $30/hr)…